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Products Description
The Nexisense HG808-H series is a high-performance humidity and temperature sensor engineered for demanding industrial environments with extremely high humidity. With a measurement range of up to 98% RH and a wide temperature tolerance, it provides precise, stable readings. It is extensively used in food processing, pharmaceutical workshops, metal treatment, and climate monitoring systems.
Operating Principle
The HG808-H sensor utilizes a capacitive humidity sensing element and thermocouple-based temperature sensing to deliver accurate environmental data.
Humidity Measurement
The sensor detects changes in capacitance caused by moisture in the air. These changes are linearly proportionalto relative humidity levels, allowing for accurate measurement up to 98% RH.
Temperature Measurement
Temperature is measuredusing a thermocouple element, converting thermal voltage changes into precisetemperature values. The processed signal is further calibrated by an embedded microprocessor to ensure stable and accurate outputs.
Structural Design
The HG808-H sensor is compact, rugged, and specifically designed to withstand harsh industrial conditions. Major components include:
Sensor Probe:Stainless steel oralloy material with IP-rated protection, resistant to corrosion, steam, and contaminants.
Sensing Unit: Integratedhigh-accuracy capacitive humidity sensor and thermocouple temperature sensor.
Electrical Interface: Supports analog (4–20mA, 0–5V, 0–10V) and digital (RS485 Modbus RTU) outputs for seamless PLC integration.
Optional LCD Display: Real-time temperature, humidity, and dew point display for on-site inspection.
The sensor is also equipped with a sintered metal filter to protect against dust, oil mist, and vapors, ensuring durability and prolonged operational life.
Measurement Modes
The HG808-H supports real-timeenvironmental data monitoring with high accuracy and multi-output support.
Humidity: ±2% RH accuracy, suitable for 0–98% RH environments.
Temperature: ±0.1°C accuracy, supports ranges from -40°C to 190°C depending on probe type.
Dew Point: Internal algorithm calculates dew point for condensation monitoring andcontrol.
Available outputtypes:
Analog: 4–20mA / 0–5V/ 0–10V
Digital: RS485 Modbus RTU
Technical Specifications
| Category | Specification |
|---|---|
| Temperature Range | -40°C to +190°C (model-dependent) |
| Humidity Range | 0 to 98% RH (Recommended: 95%–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 Output | 4–20mA /0–5V / 0–10V (Selectable) |
| Digital Output | RS485 (Modbus RTU) |
| Resolution | 0.01°C / 0.1°C; 0.01% RH / 0.1% RH (Selectable) |
| Baud Rate | 1200–115200 bps (default: 9600) |
| Sampling Interval | Minimum 1 second (adjustable per PLC) |
| Operating Environment | -20°C to +60°C; 0% RH–95% RH (non-condensing) |
| Probe Type | Split: 0A#/0B#, 6A#/6B#; Duct: 3A#/3B#, 5A#/5B# |
Application Scenarios
The HG808-H excels in a widefurnaces.
Cold Chain Logistics: Tracks temperature and humidity in refrigerated transportand storage.
Conclusion
The Nexisense HG808-H High Temperature and High Humidity Sensor offers outstanding measurement performance, industrial-grade durability, and versatile signal output options. Whetherdeployed in pharmaceutical plants, food drying facilities, or scientific monitoring systems, it ensures reliable, real-time environmental control even underthe harshest conditions.
Nexisense HG808-H — Precision sensing for extreme environments. Designedfor professionals.
