High-Temperature Humidity Sensor 200°C for Power Plant Exhaust & Flue Gas Monitoring | HENGKO HG808-T5N4
HG808-T5N4 High-Temperature Industrial Humidity Transmitter
The HENGKO HG808-T5N4 series is an industrial temperature and humidity transmitter designed for demanding high-temperature monitoring applications.
It combines heat-resistant sensing components with a robust cast-aluminum housing, stainless steel probe structure and multiple industrial outputs for reliable integration into drying equipment, ovens, process systems and environmental test chambers.
The transmitter supports temperature measurement up to 200°C according to the listed sensor range, while the selected probe structure, transmitter installation location and operating conditions should be confirmed before ordering.
Temperature range: −40 to +200°C
Humidity range: 0–100% RH, recommended below 95% RH
Signal outputs: RS485 Modbus RTU and optional analog output
Available analog signals: 4–20 mA, 0–5 V or 0–10 V
Typical applications: Industrial ovens, drying systems, test chambers and process monitoring
Key Features
Designed for stable temperature and humidity measurement, flexible system integration and dependable operation in industrial environments.
Multiple Probe Structures
Split-type and pipeline probe configurations are available for different mounting positions and process-monitoring requirements.
Digital and Analog Outputs
RS485 digital communication and optional analog output channels support integration into PLC, DCS and industrial data-acquisition systems.
High-Resolution Output
The transmitter provides selectable digital resolution and high-resolution analog output for industrial monitoring and control.
Multiple Measurement Values
RS485 output can provide temperature, relative humidity, dew point and PPM measurement values for centralized monitoring.
Industrial Protection Design
Wide-voltage input and built-in overcurrent, reverse-polarity and electrostatic-discharge protection support reliable industrial operation.
Modbus RTU Communication
Standard Modbus RTU protocol supports communication with PLCs, HMIs, DCS platforms and compatible configuration software.
Technical Specifications
The final probe, signal and installation configuration should be confirmed according to the process temperature and mounting conditions.
| Parameter | Specification |
|---|---|
| Temperature Range | −40 to +200°C |
| Humidity Range | 0–100% RH, recommended below 95% RH |
| Temperature Accuracy | ±0.1°C at 20°C |
| Humidity Accuracy | ±2% RH at 20°C and 10–90% RH |
| Power Supply | DC 10–28 V |
| Power Consumption | Less than 0.5 W |
| Analog Output | Humidity and temperature output: 4–20 mA, 0–5 V or 0–10 V |
| RS485 Digital Output | Temperature, humidity, dew point and PPM values can be read through the digital interface |
| Resolution | Temperature: 0.01°C or 0.1°C optional Humidity: 0.01% RH or 0.1% RH optional |
| Baud Rate | 1200, 2400, 4800, 9600, 19200 or 115200 bps; default 9600 bps |
| Acquisition Frequency | Fastest response setting: 1 second |
| Communication Format | 8 data bits, 1 stop bit, no parity |
| Pressure Rating | Up to 16 bar for the listed pressure-compatible configuration |
| Transmitter Working Environment | −20 to +60°C; 0–95% RH, non-condensing |
| Probe Options | Split-type and pipeline probe versions, including 3A/3B, 5A/5B and 6A/6B configurations |
Probe Configuration Options
Multiple split-type and pipeline probe structures are available to match different process temperatures, installation positions and mechanical requirements.
Split-Type Probe
Separates the sensing probe from the transmitter housing, helping keep the electronics away from the hottest process area.
Pipeline Probe
Designed for direct or adapted installation in compatible pipelines, ducts and pressurized measurement systems.
Custom Probe Selection
Probe length, cable length, protective housing and connection structure should be selected according to the actual process.
Wiring and System Integration
The transmitter can be connected to industrial controllers, monitoring systems and data-acquisition equipment through digital or analog signals.
PLC
Connect measurement data to programmable logic controllers for process monitoring and control.
HMI
Display temperature, humidity and calculated values on the operator interface.
DCS or SCADA
Integrate measurement data into centralized industrial monitoring and supervisory systems.
Data Acquisition
Record process conditions for trend analysis, quality documentation and maintenance review.
Applications for Extreme Industrial Environments
The HG808-T5N4 series is suitable for industrial processes that require stable temperature and humidity monitoring under demanding high-temperature, low-temperature or contamination-prone conditions.
High-Temperature Industrial Applications
Industrial Ovens and Furnaces
Accurate temperature and humidity monitoring supports consistent curing, drying and heat-treatment processes in coating, ceramics and metal processing.
Power Generation
Humidity monitoring in turbines, steam systems and thermal-process equipment helps reduce corrosion risk and supports equipment reliability.
Chemical Processing
Environmental monitoring in reactors, dryers and process pipelines supports stable operating conditions, process safety and product consistency.
Semiconductor Manufacturing
Stable low-humidity monitoring supports controlled production conditions during photolithography, etching, wafer processing and cleanroom operations.
Glass Manufacturing
Temperature and humidity monitoring during forming, blowing and annealing helps maintain stable processing conditions and consistent glass quality.
Industrial Drying Systems
Continuous monitoring supports moisture control in drying chambers, process dryers and high-temperature production equipment.
Low-Temperature and Environmental Applications
Cold Storage and Logistics
Continuous monitoring in freezers, refrigerated warehouses and transport environments helps maintain controlled storage conditions.
Cryogenic and LNG Systems
Temperature and humidity measurement supports low-temperature research, LNG handling and equipment protection in freezing environments.
Climate and Environmental Monitoring
Suitable for meteorological stations, high-altitude locations and severe outdoor environments requiring dependable measurement data.
Environmental Test Chambers
Used in high- and low-temperature simulation chambers for evaluating materials, electronic components and industrial products.
Wind Turbine Icing Detection
Temperature and humidity monitoring can support early detection of icing conditions around turbine equipment and exposed components.
Aerospace and Component Testing
Supports controlled environmental testing of materials, sensors and components under simulated temperature extremes.
Information Required for Product Selection
Provide the following operating information so that the appropriate probe structure, output signal and installation configuration can be confirmed.
1. Operating Temperature
Normal process temperature, maximum temperature and duration of high-temperature exposure.
2. Humidity Range
Expected operating humidity, condensation risk and required measurement accuracy.
3. Process Medium
Air or process gas composition, including oil, dust, moisture and possible corrosive contaminants.
4. Installation Requirements
Probe length, insertion depth, pipeline diameter, process pressure and transmitter mounting location.
5. Required Output
RS485 Modbus RTU, 4–20 mA, 0–5 V or 0–10 V signal requirement.
6. Control System
PLC, HMI, DCS, SCADA, data logger or independent monitoring configuration.
Need a High-Temperature Humidity Transmitter for Your Process?
Send us your operating temperature, humidity range, process gas, pressure, probe length, installation method and required output signal. Our engineering team will help confirm the appropriate HG808-T5N4 configuration.
Request Technical Support & Quotation
Application Review · Probe Selection · Signal Configuration · OEM Support
