What is temperature and humidity sensor?
Temperature and humidity sensors refer to equipment that can convert temperature and humidity into electrical signals which can be easily measured. Temperature and humidity sensors on the market generally measure temperature and relative humidity.
How does temperature and humidity sensor work?
Temperature and humidity sensors mostly use temperature and humidity integrated probes as temperature measurement components, which collect temperature and humidity signals, and after circuit processing, they are converted into current signals or voltage signals that have a linear relationship with temperature and humidity. It can also be directly passed through The main control chip performs interface output such as 485 or 232.
How to calibrate temperature humidity sensor?
The temperature and humidity sensor (SHT30 series) has been calibrated before leaving the factory, and the user can use it directly after receiving it. The second calibration is of little significance. If you still need to calibrate, you can find a temperature and humidity with the same measurement range and accurate values. Equipment for comparison. Adjust the value by manually pressing the key or modifying the communication protocol parameter.
How to choose the best temperature and humidity sensor?
The temperature and humidity sensor selection is based on the measurement accuracy, which is the most important indicator of the humidity sensor. Every increase of one percentage point is a step up or even the last level for the humidity sensor. Because to achieve different accuracy, the manufacturing cost varies greatly, and the selling price also varies greatly. Therefore, users must choose according to their own needs, and it is not advisable to blindly pursue “high, precise, and sophisticated”. If the humidity sensor is used at different temperatures, the display value should also consider the influence of temperature drift.
As we all know, relative humidity is a function of temperature, and temperature seriously affects the relative humidity in a given space. The temperature changes by 0.1°C. A humidity change (error) of 0.5% RH will occur. If it is difficult to achieve a constant temperature in the application, it is inappropriate to propose that the humidity measurement accuracy is too high. In most cases, if there is no precise temperature control method, or the space to be measured is not sealed, and the accuracy of ±5% RH is sufficient.
For local spaces that require precise control of constant temperature and humidity or occasions where humidity changes need to be tracked and recorded at any time, then choose a humidity sensor with an accuracy of ±3%RH or more. The requirement of accuracy higher than ±2%RH may be difficult even for the standard humidity generator to calibrate the sensor, not to mention the sensor itself.
Relative humidity measuring instrument, even at 20-25℃, is still very difficult to reach the accuracy of 2%RH. Usually, the characteristics given in the product information are measured at room temperature (20℃±10℃) and clean gas.
TOP10 best temperature and humidity sensors to buy.
The following recommends 10 different temperature and humidity sensor devices for different use environments:
RS-WS-*-2-*
The RS-WS-*-2-* temperature and humidity sensor is the most cost-effective sensor device. The external design of the measuring probe allows users to replace probes with different functions according to different needs, with high flexibility. This product can also add an LCD to display temperature and humidity in real-time. The overall structure has good airtightness and can be used in both indoor and outdoor environments. Wall-mounted installation is used to centrally monitor the temperature and humidity of multiple places in the industry.
Power supply: DC 10-30V
Working environment: -40℃~+60℃, 0%RH~80%RH
Temperature range: -40℃~+80℃
Humidity range: 0%RH-100%RH
Temperature accuracy: ±0.5℃ (25℃)
Humidity accuracy: ±3%RH (5%RH~95%RH, 25℃)
Resolution 0.1℃, 0.1%RH
Long-term stability: humidity ≤1%RH/y, temperature ≤0.1℃/y
Output signal RS485 or 4-20ma, 0 -5v, 0-10v
The retail price of this product is $25.7
If the space you need to monitor is relatively large, you need more equipment, and the installation location is relatively concentrated, you can choose this equipment. This device has a high protection level of IP65 and can work normally in rainy, snowy days or environments with high smoke and dust concentrations.
RS-WS-N01-8
RS-WS-N01-8 temperature humidity sensor is a common temperature and humidity measurement equipment in the power distribution cabinet. It has a standard DIN35 rail mounting slot on the back. It can be directly installed on the chassis rail. The standard Modbus RTU transmission protocol is adopted, and the communication is stable.
Power supply: 10-30V DC
Temperature range: -40℃~+60℃
Humidity range: 0%RH~80%RH
Temperature accuracy: ±0.5℃ (25℃)
Humidity accuracy: ±3%RH (5%RH~95%RH, 25℃)
Resolution: 0.1℃, 0.1%RH
Long-term stability: temperature ≤0.1℃/y, humidity ≤1%RH/y
The retail price of this product is $10
The probe is built-in and small in size, so it is often used in relatively small spaces, such as cabinets, electrical boxes, and other places. The product shell has many vents and is not waterproof.
RS-WS-*-5 EE
RS-WS-*-5 EE temperature and humidity sensor is a typical EE10 wall-mounted sensor. It has an excellent cost-performance ratio and is easy to install. It can be single humidity or integrated temperature and humidity. The output signal can be voltage, a current signal, or an RS485 signal. The RS485 output signal can also provide an LCD (liquid crystal) display.
Power supply: 10~30V DC
Humidity accuracy: ±3%RH (5%RH~95%RH, 25℃)
Temperature accuracy: ±0.5℃ (25℃)
Temperature range: -40℃~+80℃
Humidity range: 0%RH-100%RH
Long-term stability: humidity≤1%RH/y, temperature≤0.1℃/y
Output mode: RS485, 4-20ma, 0-5v, 0-10v
The retail price of this sensor without a display is $25.8, and the retail price with a display is $35.2
The EE10 indoor temperature and humidity sensor series is an ideal solution for applications such as residential and office buildings. Management of residential and office buildings, environmental control of power distribution rooms, museums, and hotels.
RS-WS-*-1-*
RS-WS-*-1-* temperature and humidity sensor is a temperature and humidity device with a built-in probe and a display. There are two signal output modes: analog and RS48. The square shell design makes the installation very exquisite.
Power supply: 10~30V DC
Temperature range: -40℃~+80℃
Humidity range: 0%RH-100%RH
Humidity accuracy: ±3%RH (60%RH, 25℃)
Temperature accuracy: ±0.5℃ (25℃)
Long-term stability: humidity≤1%RH/y, temperature≤0.1℃/y
The retail price of this product is $22
It is mostly used in residential buildings, office buildings, warehouses, and automatic control, and other places that require temperature and humidity monitoring.
RS-WS-N01-6
RS-WS-N01-6 temperature and humidity sensor is a temperature and humidity device with a storage function, which can store 65,000 records at one time. The device has buttons, which can not only display the temperature and humidity values in real-time but also adjust various values through the buttons. The built-in buzzer has an alarm function. RS485 signal output is an excellent intelligent industrial-grade temperature and humidity transmitter and recorder.
Power supply: 10~30V DCTemperature range: -40℃~+80℃Humidity range: 0%RH-100%RH
Humidity accuracy: ±3%RH (60%RH, 25℃)
Temperature accuracy: ±0.5℃ (25℃)
Storage records: 65,000
Alarm mode: sound and light alarm
This product has different prices according to different functions, and the price range is $37.2~$75.5
This industrial-grade temperature and humidity recorder are commonly used in production workshops, laboratories, computer rooms, warehouses, clean rooms, etc. in industries such as food and medicine, biological products, special storage, electronic chemicals, health care systems, server rooms, and scientific research laboratories. 24-hour monitoring of temperature and humidity data.
RS-WS-*-9TH
RS-WS-*-9TH temperature and humidity sensor is an EE series sensor for pipe installation, which is easy to install on-site. With an anti-interference circuit design, it can withstand various strong electromagnetic interferences such as on-site inverters. The equipment adopts a waterproof shell design, optional color LED display temperature transmitter, wheel display real-time temperature and humidity.
Power supply: 10-30V DC
Humidity range: 0%RH-100%RH
Temperature range: -40℃～+80℃
Humidity accuracy: ±3%RH (60%RH, 25℃)
Temperature accuracy: ±0.5℃ (25℃)
Output mode: RS485, 4-20ma, 0-5v, 0-10v
The retail price of this product without a display is $28.9
It is used to measure the temperature and humidity in fan ducts, HVAC ducts, control humidification, dehumidification and temperature adjustment, industrial environments, hotels, office buildings, hospitals, museums, laboratories, indoor homes, Internet of Things, and other measurement places.
RS-WS-WIFI-6-*
RS-WS-WIFI-6-*Temperature and humidity data logger is an industrial-grade temperature and humidity transmitter for WIFI wireless data transmission, which can collect temperature and humidity data and upload it to the server via WIFI. It adopts a large-screen LCD display, with double-layer control of upper and lower limits of temperature and humidity. Users can freely adjust the temperature and humidity values. The internal integrated alarm module can realize high temperature or low-temperature alarm, high humidity, and low humidity alarm.
Power supply: 10~30V DC
Communication interface: standard WIFI wireless (2.4GHZ)
IP address: support static IP address, automatic IP address acquisition function, support cross-gateway, domain name resolution, support WAN connection
WIFI encryption performance: support WPA/WPA2 security mode
Temperature range: -40℃~+80℃
Humidity range: 0%RH-100%RH
Humidity accuracy: ±3%RH (5%RH~95%RH, 25℃)
Temperature accuracy: ±0.5℃ (25℃)
Storage capacity: 65,000
This product has different functions and different prices. The retail price range is $65.6~$90.2
WiFi temperature and humidity data logger are widely used in computer room monitoring systems, power monitoring systems, security engineering, medical and health monitoring, energy consumption monitoring systems, smart homes, and other fields.
COS04
COS04 USB temperature humidity data logger is a device used to record changes in temperature and humidity during cold chain transportation. It is powered by a rechargeable battery, with two optional built-in and external probes, with high accuracy, and can be used continuously for half a year on a single charge. There are 80,000 and 260,000 records for storage. The measurement data can be exported in word, pdf, excel, text, etc. through the USB port.
Power supply: DC5V power supply or built-in battery power supply
Storage capacity: 80,000
Temperature range: -20~+60℃
Humidity range: 0~100%RH
Temperature accuracy: ±0.3°C (25°C)
Humidity accuracy: ±2%RH (5~95%RH, 25℃)
Recording interval: 5s ~ 18h, can be set
Data interface: USB
The retail price of the regular version of this product is $19
The small USB temperature and humidity data logger is mainly used to monitor and record the temperature and humidity data of food, medicine, chemical supplies, and other products during storage and transportation.
COS03
COS03 temperature and humidity data logger is an upgraded version of COS04. It has a large-screen LCD display, higher measurement accuracy, and more storage records. By default, it records 260,000 temperature and humidity data and can be expanded to 2.08 million data. The device has four buttons, which can manually calibrate and set alarm values.
Power supply: DC5V power supply or built-in battery power supply
Storage capacity: 260000 items
Temperature range: -40~+80℃
Humidity range: 0~100%RH
Temperature accuracy: ±0.2°C (25°C)
Humidity accuracy: ±2%RH (5~95%RH, 25℃)
Recording interval: 5s~18h, can be set
Data interface: USB
This product has different functions, so the price is different. The retail price range is $33~$82.3
COS03 temperature and humidity data logger is widely used in various links of the cold chain of storage and logistics, such as refrigerated containers, refrigerated trucks, refrigerated packages, cold storage, laboratories, and other places.
RS-BYH-M
RS-BYH-M solar radiation shield temperature and humidity sensor is an important part of outdoor weather stations. The anti-radiation shielding shell adopts IP68 high protection level, built-in high-precision temperature and humidity measuring elements, which can effectively block the erosion of sunlight, wind and snow. It is a durable agricultural temperature and humidity sensor.
Power supply: 10~30V DC
Temperature range: -20℃~+60℃
Humidity range: 0%RH~80%RH
Temperature accuracy: ±0.5℃ (25℃)
Humidity accuracy: ±3%RH (5%RH~95%RH, 25℃)
Number of plates: 6,8,10 and 12 plates optional
Protection level: IP68
Output mode: RS485, 4~20ma, 0-5v, 0-10v
The minimum retail price of this product is $35.2
This agricultural temperature and humidity sensor adopts a high-strength structural design to accurately detect in harsh climate environments and can be widely used in meteorology, ocean, environment, airports, ports, laboratories, industry, agriculture, and transportation.
Highly recommended
Two points that users must consider when buying a temperature and humidity sensor are brand and quality. Professional brands can maximize the value of your money. Good quality can save users worry during use and avoid the trouble of frequent maintenance and replacement. Renke is a professional manufacturer of temperature and humidity sensors. It has been engaged in the production and development of temperature and humidity sensors for ten years. The products meet the certification of the National Institute of Metrology and various international certifications. We have professional technicians to provide you with free technical support and Various after-sales services. Choose Renke, choose quality.
