Skip to content 
Item Number: HG808-H Series
HG808-H High Wet Temperature Humidity Transmitter
The HG808-H is an industrial-grade temperature, high humidity (Recommend < 98% RH) , 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-H series Humidity Transmitter :
| Category | Specification |
|---|---|
| Temperature Range | -40 ~ +190°C |
| Humidity Range | 0 ~ 100% RH (Recommend < 98% RH) |
| Temperature Accuracy | ±0.1°C (@ 20°C) |
| Humidity Accuracy | ±2% 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 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-H series temperature and humidity transmitter features a high-precision, durable humidity sensor with ±1.5% RH accuracy, making it ideal for harsh industrial environments with temperatures ranging from -50°C to +150°C. This series ensures effective dust-free and clean measurement, making it perfect for clean room applications.
Common uses include electronic and pharmaceutical clean rooms, hospital operating rooms, and various industrial settings such as chemical and paint workshops, agricultural engineering, and HVAC systems. The HG808-H series is also suitable for climate chambers, meteorological stations, museums, and more, where strict temperature and humidity control is essential.
For any specific measurement needs not addressed by the HG808-H series, please contact our customer service for alternative options. Thank you for considering our products!
Split/pipeline type probes with strong anti pollution and oil resistance capabilities.
Simultaneously supporting RS485 output and two analog outputs.
Analog output with 15 high-resolution bits, digital output with optional resolution of 0.1 or 0.01.
Supports single register and multi register reading.
The product has anti condensation function, which can keep the sensor synchronized in high humidity
environments.
Digital output can simultaneously read dew point, humidity, temperature, and PPM values.
Adopting the standard Modbus RTU protocol, it can easily achieve interconnection with PLC, DCS, and
various configuration software.
10V~28V ultra wide voltage input, over current protection, power polarity protection, industrial grade ESD
safety protection, and power supply anti reverse connection function.
This is a gallery to showcase images from your recent social posts
Introduction Data centers are the backbone of the digital world, hosting everything from cloud storage to essential IT infrastructure. The efficiency and reliability of these
Introduction In the realm of modern agriculture, smart greenhouses are leading the charge toward sustainable and efficient food production. These innovative structures rely on advanced
Introduction Typically, when we talk about “dew point,” we’re referring to the temperature at which water vapor condenses into liquid water. However, in the natural
Introduction Dew point monitoring plays a crucial role in various industries where humidity control is essential. The dew point is the temperature at which air
Introduction Have you ever wondered how to measure the moisture in your compressed air accurately? The dew point plays a crucial role in understanding and controlling moisture
Introduction Temperature and humidity transmitters are vital tools for maintaining environmental stability in industries like pharmaceuticals, food storage, and industrial manufacturing. These devices ensure accurate
HENGKO is a prominent supplier of temperature and humidity monitoring solutions for various industries, specializing in manufacturing advanced temperature and humidity transmitters and sensors.
Optimized by Seraphinite Accelerator
