HG808-T5N4 Industrial Transmitter of High Temperature and Humidity
HENGKO HG808-T5N4 SERIES
High Temperature Temperature and Humidity Transmitter
High-precision temperature and humidity measurement for industrial high-temperature processes, drying systems, ovens, pipelines and harsh environments up to 200°C.
The HENGKO HG808-T5N4 Series combines high-temperature-resistant sensing technology with a robust cast-aluminum housing and stainless-steel probe structure. Designed for demanding industrial environments, it provides stable temperature and humidity measurement together with flexible RS485 and analog signal integration.
| Temperature Range | −40 to +200°C |
| Humidity Range | 0–100% RH |
| Humidity Accuracy | ±2% RH @ 20°C, 10–90% RH |
| Digital Output | RS485 Modbus-RTU |
| Analog Output | 4–20 mA / 0–5 V / 0–10 V |
| Pressure | Up to 16 bar |
WHY HG808-T5N4
Reliable Humidity Measurement in High-Temperature Industrial Processes
Standard environmental transmitters can become unreliable when the sensing point is exposed to high temperature, high humidity, contamination or pressurized process conditions. HG808-T5N4 is engineered specifically for these demanding industrial measurement environments.
High-Temperature Measurement up to 200°C
High-temperature-resistant sensing elements and remote probe structures support temperature and humidity measurement in process environments from −40 to +200°C.
High-Precision Temperature & Humidity Sensing
Provides temperature accuracy up to ±0.1°C at 20°C and humidity accuracy up to ±2% RH under specified measurement conditions.
RS485 + Dual Analog Outputs
RS485 Modbus-RTU digital communication and two high-resolution analog channels provide flexible integration with PLC, DCS and industrial control systems.
Designed for Harsh Industrial Environments
Robust cast-aluminum housing, stainless-steel probe construction, anti-condensation protection and industrial electrical protection support reliable long-term operation.
HIGH-TEMPERATURE DESIGN
Engineered for Harsh Process Conditions
HG808-T5N4 separates the transmitter electronics from the high-temperature measurement point through split and pipeline probe configurations, helping protect the transmitter while placing the sensing element directly where measurement is required.
✓ Split / Pipeline Probe Design — keeps transmitter electronics away from the high-temperature sensing point
✓ Anti-Contamination Design — suitable for demanding industrial measurement environments
✓ Oil-Resistant Performance — designed for challenging process applications
✓ Anti-Condensation Protection — helps maintain stable sensing performance under high-humidity conditions
✓ 16 bar Pressure Capability — supports selected pressurized process and pipeline applications
TECHNICAL DATA
HG808-T5N4 Technical Specifications
Main measurement, electrical and communication specifications for the HG808-T5N4 high-temperature temperature and humidity transmitter.
| Temperature Range | −40 to +200°C |
| Humidity Range | 0–100% RH; recommended <95% RH |
| Temperature Accuracy | ±0.1°C @ 20°C |
| Humidity Accuracy | ±2% RH @ 20°C, 10–90% RH |
| Power Supply | DC 10–28 V |
| Power Consumption | <0.5 W |
| Analog Outputs | Humidity + Temperature: 4–20 mA / 0–5 V / 0–10 V |
| RS485 Digital Output | Temperature, humidity, dew point and PPM |
| Resolution | Temperature: 0.01°C / 0.1°C optional Humidity: 0.01% RH / 0.1% RH optional |
| Baud Rate | 1200 / 2400 / 4800 / 9600 / 19200 / 115200 bps; default 9600 bps |
| Acquisition Frequency | Fastest response: 1 second |
| Byte Format | 8 data bits, 1 stop bit, no parity |
| Pressure Rating | Up to 16 bar |
| Transmitter Environment | −20 to +60°C, 0–95% RH, non-condensing |
| Communication Protocol | Standard Modbus RTU |
| Probe Types | Split type and pipeline type; multiple A / B probe configurations |
SYSTEM INTEGRATION
RS485 and Analog Outputs for Industrial Control Systems
HG808-T5N4 supports both digital and analog signal integration, making it suitable for process automation, data acquisition and industrial environmental monitoring systems.
✓PLC
✓DCS systems
✓Industrial control systems
✓Data acquisition systems
✓Process monitoring platforms
✓Industrial configuration software
Available Signal Configurations
| RS485 | Modbus-RTU digital communication |
| 4–20 mA | Temperature + humidity analog output |
| 0–5 V | Voltage output option |
| 0–10 V | Voltage output option |
| Digital Data | Temperature + RH + dew point + PPM |
PROBE OPTIONS
Multiple Probe Options for Different Process Conditions
The HG808 Series offers six probe types, with each type available in A and B versions, providing a total of 12 probe options for different installation and protection requirements.
✓ Probe 3 – Split Type — 3A# / 3B#
✓ Probe 5 – Pipeline Type — 5A# / 5B#
✓ Probe 6 – Split Type — 6A# / 6B#
HIGH-TEMPERATURE APPLICATION
High-Temperature Humidity Monitoring for Ovens & Drying Systems
Accurate humidity measurement at elevated temperatures can help improve drying consistency, process control and product quality in industrial ovens, dryers and thermal processing equipment.
APPLICATIONS
Built for High-Temperature & Harsh Industrial Environments
HG808-T5N4 is designed for industrial applications where standard temperature and humidity transmitters may not withstand the process environment.
Industrial Ovens & Furnaces
Temperature and humidity monitoring for curing, drying, heating and thermal processing equipment.
Industrial Drying Systems
Monitor moisture-related process conditions to support consistent drying and product quality.
Chemical Processing
Measurement for selected reactors, dryers, pipelines and industrial process equipment.
Flue Gas & Combustion Monitoring
Temperature and humidity monitoring for selected high-temperature gas and combustion process environments.
Environmental Test Chambers
High-accuracy temperature and humidity sensing for controlled environmental testing systems.
Petrochemical & Refinery Processes
Suitable for selected demanding process environments involving aggressive gas compositions.
Semiconductor Manufacturing
Temperature and humidity monitoring for controlled manufacturing and process equipment.
Power Generation
Process humidity monitoring for selected thermal power and industrial energy applications.
MODEL SELECTION
What Should You Confirm Before Selecting HG808-T5N4?
| Requirement | Selection Consideration |
|---|---|
| Process temperature | Confirm actual operating temperature and peak temperature |
| Installation away from transmitter | Split probe configuration |
| Pressurized pipeline | Pipeline probe / confirm pressure |
| PLC / DCS digital communication | RS485 Modbus-RTU |
| Industrial analog input | 4–20 mA / 0–5 V / 0–10 V |
| High humidity / condensation risk | Confirm process humidity and condensation conditions |
OEM & CONFIGURATION
Configure the Transmitter Around Your Process
Different high-temperature processes require different probe structures, installation methods and output signals. HENGKO supports industrial customers, system integrators and equipment manufacturers with configurable sensing solutions.
✓Split probe configuration
✓Pipeline probe configuration
✓Multiple probe structures
✓RS485 Modbus-RTU
✓4–20 mA analog output
✓0–5 V / 0–10 V output
✓OEM equipment integration
FAQ
HG808-T5N4 High Temperature Humidity Transmitter FAQ
What temperature range does HG808-T5N4 support?
The specified measurement temperature range is −40 to +200°C. Final probe configuration should be selected according to the actual process temperature and installation environment.
Does HG808-T5N4 support RS485 Modbus?
Yes. It supports standard RS485 Modbus-RTU communication for connection with PLC, DCS and industrial monitoring systems.
Can HG808-T5N4 provide a 4–20 mA output?
Yes. Analog output options include 4–20 mA, 0–5 V and 0–10 V for temperature and humidity signals.
What parameters can be read through RS485?
Temperature, relative humidity, dew point and PPM values can be read through the digital interface.
Can it be used in pressurized pipelines?
Selected pipeline probe configurations support pressure applications up to 16 bar. Actual pressure, temperature and process connection should be confirmed before final selection.
Is HG808-T5N4 suitable for industrial ovens and dryers?
Yes. High-temperature industrial ovens, drying systems and thermal process equipment are important application areas for the HG808-T5N4 Series.
How do I choose the correct probe configuration?
Selection depends on process temperature, humidity, operating pressure, probe installation method, contamination conditions and required signal output. Send HENGKO your application parameters for configuration recommendations.
NEED HELP SELECTING A HIGH-TEMPERATURE SENSOR?
Tell Us Your Temperature & Humidity Monitoring Requirements
Send us your process temperature, humidity range, operating pressure, installation method and required output signal. Our engineers will help recommend the appropriate HG808-T5N4 probe and configuration.
Please provide:
✓ Process temperature range
✓ Humidity range
✓ Application / process medium
✓ Operating pressure
✓ Probe installation method
✓ Required probe length
✓ RS485 / 4–20 mA / voltage output
