Classification of the temperature and humidity sensors

 With temperature and humidity sensor integrated probe as temperature measuring element, temperature and humidity signal collection, after voltage filtering, operation amplification, nonlinear correction, V / I conversion, constant current and reverse protection circuit, into a linear current signal or voltage signal, and temperature and humidity output can be directly through the main control chip 485 or 232 interface output.

Temperature and humidity sensor is a sensor device equipped with wet and thermal sensitive components that can be used to measure temperature and humidity, some with field display, some without field display. Temperature and humidity sensor is widely used in various fields of production and life due to its small volume and stable performance.

Temperature and humidity sensors are divided into the following types:

 Simulation type

Temperature and humidity sensor Temperature and humidity integrated sensor is a digital integrated sensor sensor, with digital processing circuit, so as to convert the temperature and relative humidity in the environment into the corresponding standard analog signal, 4-20 mA, 0-5V or 0-10V. Temperature and humidity integrated analog-type sensor can transform the change of temperature and humidity value into the change of current / voltage value at the same time, and can be directly connected with various standard analog input secondary instruments.

 Type 485

The circuit uses microprocessor chip and temperature sensor to ensure the reliability, stability and interchangeability. Using a particle-sintered probe sheath, the probe is directly connected to the shell. The output signal type is RS485, which can reliably monitor with the upper computer system, and can communicate up to 2000 meters. The standard modbus protocol supports secondary development.

 Network type

 Network-type temperature and humidity sensor to collect temperature and humidity data and upload it to the server via Ethernet / WiFi / GPRS. Make full use of the established communication network to realize the long-distance data collection and transmission, and realize the centralized monitoring of temperature and humidity data. Can greatly reduce the construction volume, improve the construction efficiency and maintenance cost.

1 Ethernet Ethernet Temperature and Humidity Transmitter that can collect temperature and humidity data and upload it to the server through Ethernet. The product makes full use of the established Ethernet communication network to realize the long-distance data collection and transmission, and realize the centralized monitoring of temperature and humidity data. Can greatly reduce the construction volume, improve the construction efficiency and maintenance cost. The product adopts large-screen LCD display, with dual control of temperature and humidity upper and lower limits, free limit setting, temperature and humidity by password calibration, network port data transmission and other functions, internal integrated alarm function module (buzzer or relay), which can realize high and low temperature alarm and high and low humidity alarm. The product adopts the original high quality temperature and humidity measurement unit imported from Switzerland, which has the characteristics of high measurement accuracy, strong anti-interference ability, to ensure the excellent measurement performance of the product.

2 WIFI type WIFI wireless data transmission temperature and humidity transmitter, which can collect temperature and humidity data and upload it to the server through WIFI mode. Make full use of the established WIFI communication network to realize data collection and transmission, and achieve the purpose of centralized monitoring of temperature and humidity data. Can greatly reduce the construction volume, improve the construction efficiency and maintenance cost.

3 GPRS-based temperature and humidity transmitter based on GPRS transmission, only a mobile or Unicom SIM card, you can upload the collected temperature and humidity data to the server through the network base station, and the monthly GPRS communication traffic is less than 30M. The equipment is widely used in pharmaceutical transport vehicles, industrial control, building control, electric power, measurement and testing, warehouse, cold storage and other industries.