How Do Humidity and Temperature Transmitters Work?
In short, Humidity and temperature transmitters measure and send environmental data to control systems. They are widely used in HVAC, pharmaceuticals, food processing, and cleanrooms
Item Number: HG808-C Series
HG808 Stable Industrial Temperature Humidity Transmitter
The HG808 is an industrial-grade temperature, humidity, and dew point transmitter designed for harsh environments with high temperatures. In addition to measuring and transmitting temperature and humidity, the HG808 calculates and transmits the dew point, which is the temperature at which air becomes saturated with water vapor and condensation begins to form.
Here’s a breakdown of the key features:
▪Integrated design, simple and elegant
▪Industrial grade ESD safety protection and power supply anti reverse connection design
▪Using waterproof, dustproof, and high-temperature resistant probes
▪Sensitive waterproof and anti fine dust high-temperature probe
▪Standard RS485 Modbus RTU communication protocol
The ability to measure dew point makes the HG808 ideal for applications where moisture control is critical, such as:
By measuring and transmitting all three values (temperature, humidity, and dew point), the HG808 provides a comprehensive picture of moisture conditions in harsh environments.
Here’s a specification details for the HG808-C series Humidity Transmitter :
Category | Specification |
---|---|
Temperature Range | -50 ~ +150°C (-40 °F to 302 °F) |
Humidity Range | 0 ~ 100% RH (Recommend < 95% RH) |
Temperature Accuracy | ±0.1°C (@ 20°C) |
Humidity Accuracy | ±1.5% RH (@ 20°C, 10 ~ 90% RH) |
Power Supply | DC 10V ~ 28V |
Power Consumption | < 0.5W |
Analog Outputs | Humidity + Temperature: 4~20mA / 0-5V / 0-10V (one out of three) |
RS485 Digital Output | Temperature, humidity, dew point, PPM (read simultaneously) |
Resolution Ratio | 0.01°C / 0.1°C (optional) 0.01% RH / 0.1% RH (optional) |
Baud Rate | 1200, 2400, 4800, 9600, 19200, 115200 (default: 9600 bps) |
Acquisition Frequency | Fastest response: 1 second; other settings per PLC |
Byte Format | 8 data bits, 1 stop bit, no check |
Pressurization | 16 bar |
Working Temperature | -20°C ~ +60°C, 0% RH ~ 95% RH (Non-condensation) |
Probe Type | Split type: Probe 1 –Split type :1A# / 1B# Probe 5 – Pipeline :5A# / 5B# |
We offer 6 types of probes for the HG808 Humidity Transmitter, with each type available in both A and B versions, providing a total of 12 probes for various application options.
0A#
1A#
3A#
5A#
6A#
8A#
0B#
1B#
3B#
5B#
6B#
8B#
M20 Hexagonal thread stainless steel probe connector
G1/2 Hexagonal thread stainless steel probe connector
NTP1/2 Hexagonal thread stainless steel probe connector
M27 Hexagonal thread stainless steel probe connector
M20 Flange stainless steel probe connector
Line Color | Definition | Specification |
---|---|---|
Power Cord | ||
Red | Power supply positive | 10 ~ 30V DC |
Black | Power supply negative | GND |
Analog Output Lines | ||
Brown | Temperature signal positive | 4-20mA output |
Blue | Temperature signal negative | Connects to Black (GND) |
Grey | Humidity signal positive | 4-20mA output |
White | Humidity signal negative | Connects to Black (GND) |
RS485 Wiring | ||
Yellow | RS485A | Twisted pair cable |
Green | RS485B | Twisted pair cable |
Additional Notes:
Important:
Industrial processes often involve extreme temperatures and humidity levels. Regular transmitters can’t handle these harsh conditions. Here’s a breakdown of applications where high-temperature and humidity transmitters (operating over 200°C and down to -50°C) are crucial:
These are just a few examples. High-temperature and humidity transmitters play a vital role in various industries by ensuring process control, product quality, and safety in extreme environments.
The HG808-C series temperature and humidity transmitter features a high-precision, long-lasting humidity sensor probe with an accuracy of ±1.5% RH, making it ideal for measuring temperature and humidity in harsh industrial settings, with a range of -50°C to +150°C. This series is designed for dust-free and clean temperature and humidity measurements, providing superior protection and control, making it perfect for clean room applications. It is widely utilized in environments such as electronic and pharmaceutical clean rooms, hospital operating rooms, and more. The HG808-C series is suitable for various sectors, including pharmaceuticals, chemicals, industrial painting, automation systems, HVAC, agriculture, and quality control, all requiring stringent temperature and humidity regulation. If the HG808-C series does not meet your measurement needs, please contact our customer service for other temperature and humidity measurement options. Thank you for your interest!
In short, Humidity and temperature transmitters measure and send environmental data to control systems. They are widely used in HVAC, pharmaceuticals, food processing, and cleanrooms
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