HG808-H High Wet Temperature Humidity Transmitter
The HG808 Industrial High Humidity / Wet Type Humidity Transmitter by HENGKO is specially designed to deliver accurate and stable humidity and temperature measurements even in extremely high humidity environments up to 98% RH. With durable engineering and advanced sensor technology, it maintains precision and long-term reliability even in wet, steamy, or corrosive industrial settings.
Perfect for demanding applications such as food processing, drying chambers, pharmaceutical plants, and high-temperature kilns, the HG808 ensures minimal failure rates in 95–98% RH conditions, making it a trusted solution for critical environmental monitoring.
Highlights:
*Exceptional Stability in High Moisture / humidity Condition
Long-term operation and lifespan in near-saturation humidity without degradation or drift.
*Precision Sensor Technology
High accuracy ±2% RH, ±0.2°C ensures reliable data for critical control systems.
*Robust Construction
Withstands harsh process environments, reducing downtime and maintenance.
*Safety & Compatibility
Built-in ESD protection, reverse polarity protection, and standard Modbus protocol ensure safe, seamless deployment.
✅ High-Humidity Durability (95–98% RH)
New-generation design resists damage from long-term exposure to moisture-saturated environments.
✅ Precision & Stability
Maintains accurate readings even under rapid temperature and humidity fluctuations.
✅ Wide Measurement Range
Temperature: -40°C to 190°C
Humidity: 0–98% RH
✅ Real-Time Dew Point Calculation
Built-in algorithm to monitor and manage condensation risks.
✅ Multi-Signal Output
Supports RS485 Modbus RTU, 4–20mA, and optional 0–5V / 0–10V for easy integration.
✅ Durable Industrial Probe
Waterproof, anti-corrosion sensor housing with sintered metal filter for dust and vapor resistance.
✅ Optional Local Display
On-screen T/RH/Dew Point readouts available for real-time monitoring.
✅ Full System Compatibility
Easy connection with PLCs, DCS, SCADA, and building control systems.
✅ Safety-Protected Circuit Design
Built-in ESD and reverse polarity protection for reliable industrial use.
Data Sheet
Specification details for the HG808-H series Humidity Transmitter :
| Category | Specification |
|---|
| Temperature Range |
-40 ~ +100°C (or -40°F to 212°F) |
| Humidity Range |
0 ~ 100% RH (Recommend < 95% 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 0 -Split type ：0A# / 0B#
Probe 3 - Pipeline ：3A# / 3B#
Probe 5 - Pipeline ：5A# / 5B#
Probe 6 - Split type ：6A# / 6B#
|
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.
Probe Option
HG808-H Series Products List and Order Number:
1.) With Display
2.) Without Display
Applications for Extreme Environments
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:
High-Temperature Applications (Over 200°C):
- Industrial Ovens and Furnaces: Monitoring temperature and humidity is vital in curing processes like painting, drying ceramics, and heat treating metals. Precise control ensures product quality and prevents defects.
- Power Generation: Humidity measurement in power plants helps prevent corrosion in turbines and other equipment exposed to high temperatures and steam.
- Chemical Processing: Accurate temperature and humidity data is essential for safe and efficient chemical reactions in reactors, dryers, and pipelines. Deviations can lead to hazardous situations or product contamination.
- Semiconductor Manufacturing: Creating microchips involves tightly controlled environments with high temperatures and low humidity. Transmitters ensure proper conditions for sensitive processes like photolithography and etching.
- Glass Manufacturing: Glass production requires precise temperature and humidity control during melting, blowing, and annealing. Transmitters help maintain consistent glass quality and prevent defects.
Low-Temperature Applications (Down to -50°C):
- Cold Storage Facilities: Monitoring temperature and humidity in freezers and cold warehouses helps maintain optimal conditions for food preservation and prevent spoilage.
- Cryogenic Applications: Extremely low temperatures are used in research and industrial processes like superconductivity and liquefied natural gas (LNG) storage. Transmitters ensure safe handling and prevent equipment damage from ice formation.
- Climate Monitoring: These transmitters are valuable tools for weather stations in extreme cold environments like the Arctic or high mountain regions. They provide accurate data for climate research and weather forecasting.
- Aerospace Industry: Testing aircraft components for functionality in frigid conditions requires precise temperature and humidity control. Transmitters simulate real-world scenarios and ensure aircraft safety.
- Wind Turbine Icing: Detecting and measuring ice formation on wind turbine blades is crucial for safe operation. Transmitters help prevent blade damage and power generation loss in cold climates.