ZFX-13001 12V DC High Precision Capacitive Humidity Controller The ZFX-13001 12V DC high-precision digital humidity control controller is with wide humidity measuring range and controlling range and comes with a humidity controller sensor probe with cable. The humidity sensor uses a high-precision capacitive faster chip which has the advantage of high accuracy to reflect. The humidity measuring range is 1 percent - 99 percent RH and the control range is 1 percent RH. Humidification and dehumidification can be set through the menu, the parameters have been set for the power outage permanent memory function. The digital humidity controller can set a high or a low humidity limit when the humidity is beyond the compass of limits, it will humidify or dehumidify automatically With the humidity sensor, uses a high precision capacitive chip, high accuracy, and wide humidity measuring range. With a large and clear LED display for better readability. Anti-interference control: When the temperature control mode (code is HC) was H, eg. the setting control humidity is 50% RH, slewing range of temperature is 5% RH, when the environment humidity setting temperature (50% RH) + slewing range (5% RH), the relay will switch on and start the output load; when the environment humidity is setting temperature (50% RH) + slewing range (5%RH), the relay will switch off and stop the output load. Humidification control: When the temperature control mode (code is HC) was C, e. g. the setting control humidity is 50%RH. slewing range of temperature is 5%RH, when the environment humidity setting temperature (50%RH)-slewing range (5%RH). the relay will switch on and start the output load; when the environment humidity is set temperature (50% RH), the relay will switch off and stop the output load. Applications: Hatching device Refrigerator Greenhouse cultivation Freezer PACKAGE INCLUDED: 1 x ZFX13001 12V DC Humidity Controller

DHT11 Humidity and Temperature Sensor Module The DHT11 Humidity and Temperature Sensor Module is capable of sensing both temperatures as well as humidity. This makes it ideal for projects as well as automation. The board is also equipped with a high-performance 8-Bit microcontroller connected to the DHT11 sensor module. The output of the DHT11 Temperature Sensor Module is in the form of a digital signal on a single data pin. The sensing update frequency is to be measured every 2sec (0.5Hz). The DHT11 Sensor Module can be interfaced with any microcontroller like Arduino , Raspberry Pi , etc. This Sensor module integrates the DHT11 sensor and other required components on a small PCB. The DHT11 sensor includes a resistive-type humidity measurement component, an NTC temperature measurement component, and a high-performance 8-bit microcontroller inside, and it provides calibrated digital signal output. The Module has high reliability and excellent long-term stability, thanks to the exclusive digital signal acquisition technique and temperature & humidity sensing technology. Browse the wide range of Sensors at lowest prices. DHT11 sensor module pin description 1 Vcc Power +Ve (3.3VDC to 5.5VDC Max wrt. GND) 2 Out/Data Outputs both Temperature and Humidity through serial Data 3 Ground Power Ground or Power –Ve Read more : Interfacing the DHT11 sensor with the ESP32 board Applications: Measure temperature and humidity Local Weather station Automatic climate control Environment monitoring Home Automation

SHT20 MRS Type I2C Humidity and Temperature Sensor Probe -7Semi The SHT20 MRS Type I2C Humidity and Temperature Sensor Probe by 7Semi is a robust and precise sensing solution tailored for demanding environments. Utilizing advanced CMOSens technology, this sensor delivers highly accurate humidity and temperature measurements over a broad temperature range of -40°C to 125°C. It features a digital I2C interface, enabling seamless integration with microcontrollers and low-power operation. Housed in a stainless-steel breathable shell, the sensor is built to resist high pressure (up to 150 bar), extreme temperatures, and harsh chemical exposure. It comes factory-calibrated at multiple points for reliable readings and offers superior protection against dust and contaminants. With a 1-meter cable and Mini Round Shell connector, it ensures flexible and secure installation in tight or rugged spaces such as industrial pipelines, environmental test chambers, and hazardous locations. Features: Accurate and Stable Measurements: The CMOSens technology offers digital, linearized readings with little drift over time, and it supports temperatures ranging from -40°C to 125°C. Robust Metal Probe Construction: Stainless steel porous housing is resistant to high pressure, corrosion, and dust, making it perfect for long-term industrial applications. Advanced Breathable Shell Design: Provides high air permeability and a rapid humidity exchange rate while shielding inside electronics from dust and chemical contamination. Pre-calibrated and Digital Output: Fully factory-calibrated for humidity and temperature, with an I2C interface for seamless integration and low-power data transfer. High filtration efficiency: Precision pore diameters (5–120 microns) provide superior filtration, interception, and uniform dispersion performance. Exceptional Environmental Resistance: Reliable in difficult situations such as high humidity, heated drying operations, restricted spaces, vacuum chambers, and explosive conditions. Long-Term Durability: The anti-shedding design and superior material quality provide extended service life and consistent readings over time.

SenseCAP S2120 8-in-1 LoRaWAN Weather Sensor Delivers 8 Key Weather Metrics - Seeed Studio The SenseCAP LoRaWAN S2120 Weather Station is a high-precision LoRaWAN 8-in-1 weather sensor designed to capture and transmit key environmental parameters, including air temperature, humidity, wind speed and direction, rainfall intensity, light intensity, UV index, and barometric pressure. Supported by global LoRaWAN networks, it ensures reliable long-range data transmission with minimal power consumption. Engineered for durability and versatility, this hyperlocal outdoor weather station is ideal for gardens, agriculture, meteorology, and urban environmental monitoring. With built-in Bluetooth for fast OTA configuration and remote management, it offers both convenience and low maintenance costs, making it an efficient and long-lasting solution for professional and personal environmental monitoring needs. Features: Scan-and-Play Simplicity, Easy Configuration Over Bluetooth in About One Minute Built-in Bluetooth eliminates the need for time-consuming setting tasks, allowing those with little or no technical expertise to easily get started with weather detection. Powerful SenseCAP Mate App Data Visualization and Remote Device Management Compatibility with Many Networks and Platforms Easily interacts with existing global LoRaWAN networks. Other Features: 8-in-1 Weather Monitoring – Measures air temperature, humidity, wind speed, wind direction, rainfall intensity, light intensity, UV index, and barometric pressure in one device. LoRaWAN Connectivity – Uploads real-time data reliably over worldwide LoRaWAN networks. Quick Bluetooth Configuration – Set up in just 1 minute with the SenseCAP Mate App; supports remote management of real-time and historical data. Ultra-Low Power Consumption – Powered by a 0.5W solar panel with 3 × standard 1.5V AA dry batteries, lasting up to 2 years. Expandable Battery Capacity – Option to add an external compartment for 6 batteries, doubling service life. Durable Outdoor Performance – Resistant to high UV exposure, heavy rainfall, dust, and other harsh conditions. Built-In Remote Management – OTA configuration and device management through SenseCAP Mate App and SenseCAP Portal. Easy Installation & Flexible Layout – Includes poles, mounting stand, and accessories for fast deployment in diverse environments. How to Select a Gateway: LoRaWAN network coverage is essential when employing sensors, and there are two LoRaWAN network possibilities. Option 1: Sensors operate in areas covered by the Helium Network. Option 2: Sensors operate in a typical LoRaWAN network, such as The Things Network, Loriot, Chirpstack, etc. Applications: Backyard & Gardens: To safeguard your family, measure the air temperature and humidity in the backyard and garden, as well as the rainfall intensity and UV index. Smart Agriculture: Allow farmers to acquire climate data and information in real time, implement scientific management techniques in production, and increase agricultural output capacity and levels. Meteorology: Support applications in the professional meteorological sector, such as immediately reflecting the changes of various abnormal meteorological conditions in the field of traffic and transportation to give real-time scientific basis data for traffic management departments. Urban Weather: Provide real-time data for city squares, parks, scenic regions, golf courses, and other urban locations. Field Deployment SenseCAP S2120 8-in-1 LoRaWAN Weather Sensor Diagram How to Deploy

SenseCAP S1000 V2 Weather Sensor – 10-in-1 Environmental Sensor with CO₂, PM2.5, PM10 Monitoring -Seeed Studio The SenseCAP S1000 V2 10-in-1 environmental sensor delivers precise, real-time monitoring of 10 key parameters in a single, integrated device. It measures air temperature, humidity, barometric pressure, light intensity, precipitation, wind speed, wind direction, CO₂, PM2.5, and PM10 (air quality), making it a complete solution for outdoor, agricultural, and smart city applications. With an industrial-grade design, IP66-rated enclosure, and an operating temperature range from -40°C to +85°C, it ensures durability and reliability even in the harshest environments. Its output interfaces (RS485 MODBUS-RTU / SDI-12) enable seamless integration into existing monitoring systems and IoT platforms. Engineered for high performance and low maintenance, the S1000 features a thermostatically controlled heating system for cold climates, ultrasonic wind sensors with no moving parts for long-lasting use, and radiation shields for accurate measurements. It comes with a 3m cable and pole-mount accessories for easy deployment. To guarantee consistent accuracy and performance, the sensor undergoes six rigorous reliability tests, including wind tunnel calibration, high/low temperature trials, vibration, waterproofing, and structural validation. Compact yet powerful, the SenseCAP S1000 stands as a trusted 10-in-1 environmental sensor that measures CO₂, PM2.5, and PM10 (air quality) with exceptional precision and reliability. Features: 10-in-1 Measurement: Monitors air temperature, relative humidity, barometric pressure, light intensity, precipitation intensity, wind speed, wind direction, CO₂, PM2.5, and PM10 in a single device. Industrial-Grade Design: Operating temperature from -40°C to +85°C, IP66-rated waterproof and dustproof housing, built for outdoor environments. Multiple Output Interfaces: Supports RS485 (MODBUS-RTU) and SDI-12 for seamless integration with monitoring and IoT systems. Heating System for Cold Climates: Thermostatically-controlled independent power supply ensures stable operation in extreme cold. Durable Components: Includes a 3m pole-mount cable, radiation shields for accurate measurements, and ultrasonic wind sensors with no moving parts. Applications: Smart Agriculture, Smart City, Power Transmission, Renewable Energy, Transportation, and Traffic Today, data on localized weather, known as microclimates, represents the next frontier in more precise and accurate weather forecasting. As a result, the collection of weather data is becoming smaller and more gridded. In light of this, weather sensors, which are the most convenient way to collect weather data, are becoming increasingly popular. This SenseCAP ONE S1000 10-in-1 Compact Weather Sensor allows you to gather and monitor environmental and weather data, which is important in a variety of application situations, such as smart city projects, among others. It is IP66 rated and has high durability to survive even the harshest outdoor conditions. In place of a standard mechanical 3-cup or vane anemometer, wind speed and direction sensors employ ultrasound. The advantage of employing ultrasonic sensors is that minimizing the number of movable elements makes the sensor less likely to break, making maintenance easier without sacrificing precision or labor. SenseCAP ONE is a series of all-in-one small weather sensors that measure up to ten weather parameters simultaneously: air temperature, air humidity, atmospheric pressure, light intensity, wind speed, wind direction, precipitation, PM 2.5, PM 10, and CO2. The SenseCAP ONE series employs the RS485 (MODBUS-RTU) / SDI-12 communication protocol. As a result, the SenseCAP ONE tiny weather sensor is compatible with any data logger that supports RS485 (MODBUS-RTU) or SDI-12. Hardware Overview

10K Thermistor Temperature Sensor Module(3 Pin) Thermistor Temperature Sensor Module is very sensitive to ambient temperature. This electronic part generally used to detect the temperature of the surrounding environment. Through potentiometer adjustment, it is possible to change the temperature detection threshold. DO output can be directly connected to the microcontroller to detect high and low, by detecting temperature changes in the environment. The temperature detection range of the module is between 20 and 80 degrees Celsius. This sensor module can be replaced with a line temperature sensor for controlling the water temperature, water tank, etc. Generally, the 4-wire method of thermistor measurement is the most accurate because there is effectively no current flowing in either of the measurement cable wires and therefore no added resistance due to the cable wires. Also check the DC 3-5V MAX6675 Module + K Type Thermocouple Temperature Sensor Thermocouple Sensor Set M6 Screw and Jumper Wire F to F 5pcs

XM-18 Mini Digital Automatic Egg Incubator This is the XM-18 Mini Digital Automatic Egg Incubator, which is a researched product that uses microcomputer technology. This egg incubator is integrated with the latest electronic component for the highest accuracy. It features a digital temperature sensor and moisture-sensitive capacitance humidity sensor. This incubator is stable and reliable, time-saving, labor-saving, and easy to use. Features: High-quality circuit components, reliable quality, stable performance, leakage resistance, and durability. The automatic multi-function incubator equipping with the imported digital temperature sensor and France moisture-sensitive capacitance humidity sensor. Easy to control the temperature and humidity. The automatic multi-function incubator is miniaturized, intelligent, high measurement accuracy. This incubator is stable and reliable, time-saving, labor-saving, and easy to use. It is the ideal incubation equipment for the propagation of poultry and rare birds and small and medium-sized hatchery. Applications: Humidity and Temperature control in egg incubator

Sensirion SHT30-DIS I2C humidity & temperature sensor SHT3x-DIS is the next generation of Sensirion’s temperature and humidity sensors. It builds on a new CMO sensor chip that is at the heart of Sensirion’s new humidity and temperature platform. The SHT3x-DIS has increased intelligence, reliability and improved accuracy specifications compared to its predecessor. Its functionality includes enhanced signal processing, two distinctive and user selectable I2C addresses and communication speeds of up to 1 MHz. The DFN package has a footprint of 2.5 x 2.5 mm2 while keeping a height of 0.9 mm. This allows for integration of the SHT3x-DIS into a great variety of applications. Additionally, the wide supply voltage range of 2.4 V to 5.5 V guarantees compatibility with diverse assembly situations. All in all, the SHT3x-DIS incorporates 15 years of knowledge of Sensirion, the leader in the humidity sensor industry. Pin description: 1 Vin this is the power pin 2 GND common ground for power and logic I2C Logic pins 3 SCL I2C clock pin, connect to your microcontrollers I2C clock line 4 SDA I2C data pin, connect to your microcontrollers I2C data line 5 ADR This is the I2C address selection pin 6 RST Hardware reset pin 7 ALR Alert/Interrupt output

12V Mini Digital Air Humidity Control Controller MH13001 12V Digital Air Humidity Control Controller Range designed as digital humidity control controller. It comes with a wide humidity measuring range and controlling range consisting of a humidity controller sensor probe with cable. This humidity Capacitive Digital Temperature and Humidity Module is a temperature and humidity composite sensor providing a calibrated digital signal output. This digital output is displayed via an LCD. The display is red that shows three “LED” digits, which clearly shows the temperature full value (no decimal place). Humidity sensors make use of high-precision capacitive faster chip which has the advantage of high accuracy to reflect. It offers a Humidity measuring range of 1 percent ~ 99 percent RH and also has a control range of 1 percent RH. In this module, the humidification and dehumidification are set via the menu, thus the parameters have been set for the power outage permanent memory function.

XH-W3002 Intelligent Led Digital Microcomputer Temperature Controller Mini Thermostat Switch with Water-Resistant Sensor Probe 10A (Max) Multipurpose Controller This is XH-W3002 AC 220V 1500W Digital Temperature Controller Microcomputer Thermostat Switch. A temperature measurement and Controller tool with high accuracy and precision at a very low cost. It offers a high-temperature control precision of 0.1?. The temperature control range from -50? to 110?. TheLED Display shows the results clearly. One can directly install or embed the XH-W3002 in industrial control equipment panel, convenient and quick. It features a 1M probe made up of stainless steel material which makes it waterproof and does not let it rust easily. Also, all the delicate and sensitive components are kept safe in ABS flame retardant housing which is avirulent and environmental protective. Digital display LLL: If the digital tube displays LLL, the sensor is faulty. Please repair the sensor or replace the sensor. Digital display HHH: If the digital tube displays HHH, this is because the detected temperature is beyond the measurement range. Button functions of the XH-W3002 Controller: Press UP to show the start temperature button. On Long press of the UP button, the display starts flashing, then press the UP or DOWN button Set the beginning of the temperature value Press Down the display button to stop temperature. On the Long press of the Down button, the display starts flashing, then press the Up or Down button Set to stop the temperature value. Also check the XK-W2001 Adjustable Temperature Controller Socket with 1M Probe and AU Plug available on Iotcart. The adjustable temperature controller socket features a clear digital display for better readability and has a wide temperature measuring range from -50? to 110?.

DHT11 Humidity and Temperature Sensor The DHT-11 Digital Temperature And Humidity Sensor is a basic, ultra low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air and spits out a digital signal on the data pin (no analog input pins needed). It's fairly simple to use but requires careful timing to grab data. The only real downside of this sensor is you can only get new data from it once every 2 seconds, so in your code please use sensor reading interval at 2 seconds or more. Compared to the DHT22, this sensor is less precise, less accurate, and works in a smaller range of temperature/humidity. But despite its disadvantages over DHT22, it is a smaller and less expensive sensor for temperature and humidity measurement. APPLICATIONS: Measure temperature and humidity Local Weather station Automatic climate control Environment monitoring Also check the DHT11 Humidity and Temperature Sensor Module pack of 25, The module operates in the voltage range of 3.3VDC to 5.5VDC and is described as a basic, ultra-low-cost digital temperature and humidity sensor.

BME680 Digital Humidity Temperature Pressure High Altitude Sensor Module Discover an unparalleled sensor module, the BME680 Digital Humidity Temperature Pressure High Altitude Sensor Module, for precise environmental measurements. This module ensures accurate readings of humidity, temperature, and pressure, making it an ideal choice across various applications. Whether you're an enthusiast or professional, the BME680 module offers unmatched versatility. It seamlessly integrates with popular development platforms like Arduino and Raspberry Pi , simplifying the incorporation into IoT projects, home automation systems, and smart devices. Leveraging its advanced capabilities, this sensor module empowers you to monitor and analyze air quality, making it perfect for both indoor and outdoor environments. Stay updated on weather conditions, establish data logging systems, and enhance industry applications with the precise measurements provided by the BME680. Witness accuracy, efficiency, and innovation with the BME680 module. Features: BME680 Digital Humidity Temperature Pressure High Altitude Sensor Module Monitors humidity, temperature, and pressure for accurate data. Easily connects to popular development platforms like Arduino and Raspberry Pi. Keeps track of indoor and outdoor air quality. Suitable for weather monitoring and industry-specific needs. Enables creation of comprehensive data logging systems to track environmental changes. Designed for efficiency and reliability in measurement tasks. Applications: Personal air quality tracker Air quality mapping Air quality inside cars & public transport Enhanced context awareness Accurate step & calorie tracker Quick GPS fix & improved navigation Indicator of too high/low humidity Air quality & well-being indicator Sleep/recovery tracker Weather trend Stair counter Floor level detection

BME 280 Temperature Sensor Module This BME280 Sensor Breakout is the easy way to measure barometric pressure, humidity, and temperature readings all without taking up too much space. Basically, anything you need to know about atmospheric conditions you can find out from this tiny breakout. The BME280 Breakout has been designed to be used in indoor/outdoor navigation, weather forecasting, home automation, and even personal health and wellness monitoring. The on-board BME280 sensor measures atmospheric pressure from 30kPa to 110kPa as well as relative humidity and temperature. This bme280 sensor uses an environmental sensor manufactured by Bosch with temperature, a barometric pressure sensor that is the next generation upgrade to the popular BMP085/BMP180/BMP183 Sensor. This bme 280 sensor is great for all sorts of weather sensing and can even be used in I2C interface. This precision sensor from Bosch is the best low-cost, precision sensing solution for measuring barometric pressure with ±1 hPa absolute accuracy, and temperature with ±1.0°C accuracy. Because pressure changes with altitude and the pressure measurements are so good, you can also use it as an altimeter with ±1 meter accuracy. The BME280 is the next-generation of sensors from Bosch, and is the upgrade to the BMP085/BMP180/BMP183 - with a low altitude noise of 0.25m and the same fast conversion time. It has the same specifications but can use either I2C or SPI. For simple easy wiring, go with I2C. If you want to connect a bunch of sensors without worrying about I2C address collisions, go with SPI. Features: Multi-functional Sensor: Measures temperature, humidity, and barometric pressure. High Accuracy: Temperature accuracy of ±1°C, humidity accuracy of ±3%RH, and pressure accuracy of ±1 hPa. Wide Measurement Range: Temperature range from -40°C to +85°C, humidity range from 0% to 100% RH, and pressure range from 300 hPa to 1100 hPa. Compact Size: Small 2.5 x 2.5 x 0.93 mm package. Low Power Consumption: Designed for low power consumption, making it ideal for battery-operated devices. Communication Protocols: Supports both I2C and SPI communication protocols for easy integration with microcontrollers. Altitude Calculation: Can indirectly calculate altitude using atmospheric pressure. Applications: Context awareness, e.g. skin detection, room change detection Fitness monitoring/well-being Warning regarding dryness or high temperatures Measurement of volume and airflow Home automation control Control heating, ventilation, and air conditioning (HVAC) Internet of things GPS enhancement (e.g. time-to-first-fix improvement,dead reckoning, slope detection) Indoor navigation (change of floor detection, elevator detection) Outdoor navigation, leisure and Weather forecast Sports applications Also check the MLX90614ESF Infrared IR Temperature Sensor Module offered by Iotcart. It is an Infra-Red thermometer designed for non-contact temperature measurements. The sensor features an integrated IR-sensitive thermopile detector chip and a signal conditioning ASIC in the same TO-39 can.

Thermoelectric Peltier Refrigeration Cooling System DIY Kit With TEC-12706 Peltier Semiconductor coolers are a form of solid-state cooling that incorporates both semiconductor technologies and electronic assembly techniques. The thermoelectric Peltier refrigeration cooling system DIY kit is one such example. The DIY kit is a semiconductor cooling kit that uses a TEC1-12706 Thermoelectric Cooler Peltier Module. The kit has 2 heat sinks, the bigger one is for the hotter side and the smaller one is for the cooler side. The bigger the heat sink, the greater dissipation of the heat. The fan, also included in this kit acts as a radiator. This is attached to the bigger heat sink . The TEC1-12706 thermoelectric Peltier module is sandwiched between the two heat sinks. The module will reduce the temperature. Note: This is an unassembled kit. How To Assemble The Thermoelectric Peltier Refrigeration Cooling System DIY Kit: First, take the large heatsink and the cotton washer (which will hold the Peltier in place), remove the cotton washer’s sticker and place it on top of the large heat sink, making sure to align it. Apply thermal grease or heatsink compound before installing the TEC1-12706 Peltier module (the heatsink compound/thermal grease increases the heat transfer rate). Then, firmly press the TEC1-12706 Peltier module against the heatsink (Remember the cold side of the Peltier module is always the surface with letterings) Apply the heatsink compound/thermal grease above the TEC1-12706 Peltier module and place the small heatsink on top of it and attach the screws Place the brushless dc fan on top of the large heat sink, align it properly, and screw it in place. Next, attach the safety grill to the brushless dc fan and then screw it in place. Read our blog Peltier module working principle where we explained what is a Peltier Cooler, how it works, things to keep in mind while using a Peltier, and applications of Peltier. Features: Cooling Technology: Utilizes a TEC1-12706 Thermoelectric Cooler (Peltier module) for efficient heat transfer. Components Included: Comes with a Peltier module, heat sinks, a cooling fan, thermal paste, and necessary screws. Operation: The Peltier module creates a temperature difference when an electric current is applied, with one side becoming hot and the other cold. Power Supply: Typically operates at 12 volts. Heat Dissipation: Includes a heat sink and fan to dissipate heat from the hot side of the Peltier module. Compact Design: Small and easy to integrate into various cooling projects. Applications: Suitable for small-scale cooling projects like cooling electronic components, small refrigerators, or custom cooling solutions for CPUs Applications: Pet Air Conditioner. Portable refrigerators. Medical instruments. Mini Fridge Portable Cooler Projects Pet Space or Enclosure Cooling Electronics Component Cooling Medical and Laboratory Equipment Cooling IoT and Embedded System Thermal Management

10K Temperature Sensor (Thermistor) A 10K temperature sensor (also known as a thermistor) is a type of resistor that changes its resistance value in response to changes in temperature. The "10K" refers to its resistance value at a temperature of 25°C, which is 10,000 ohms. Thermistors are commonly used in temperature sensing and control applications because of their high sensitivity and fast response time. They are often preferred over other temperature sensors such as thermocouples and RTDs because they are smaller, cheaper, and easier to use. There are two main types of thermistors: negative temperature coefficient (NTC) and positive temperature coefficient (PTC). NTC thermistors have a resistance that decreases as the temperature increases, while PTC thermistors have a resistance that increases as the temperature increases. Thermistors are inexpensive, easily obtainable temperature sensors.  They are easy to use and adaptable.  Circuits with thermistors can have reasonable output voltages - not the millivolt outputs thermocouples have.  Because of these qualities, thermistors are widely used for simple temperature measurements.  They're not used for high temperatures, but in the temperature ranges where they work, they are widely used. Applications: Temperature control in HVAC systems Medical equipment Industrial processes Automotive systems Environmental monitoring Consumer electronics. Also check 10K Thermistor Temperature Sensor Module(3 Pin) Also check 10K Thermistor Temperature Sensor Module(4 Pin) . The module is small and low-cost. It can be used to detect the temperature of the surrounding environment.