Product Description:

YJJ HSH-DM3M-E Duct Temp Humidity Sensor 4-20mA Digital Transmitter for HVAC BMS System

Features:

I. Model Code Explanation (HSH-E Outdoor Sensor Series)

HSH-E: Outdoor Installation Type Temperature and Humidity Transmitter (compared to the duct-in probe type DM, EM is an outdoor wall-mounted probe)

M: Humidity - 4 - 20mA Current Output

3: Humidity Basic Accuracy ±3% RH

M-E: Digital Chip for Temperature Channel, Dual Independent 4 - 20mA Output

Summary: Outdoor Wall-Hanging, Dual 4 - 20mA for Temperature and Humidity, Humidity Accuracy ±3% RH, Digital Sensing Element

II. Core Measurement Performance

Temperature Parameters

Temperature Measurement Range: -40℃ ~ +60℃

Measurement Accuracy: Error ≤ 0.3K at 25℃ operating condition

Temperature Resolution: 0.1℃

Humidity Parameters

Humidity Measurement Range: 0 - 95% RH (Prohibit Condensation Environment)

Standard Accuracy at 25℃:

20 - 80% RH: ±3% RH

Full Range 0 - 95% RH: ±5% RH

Annual Long-Term Drift ≤ ±1% RH

T90 Response Time < 8 s

III. Electrical Specifications

Power Supply: DC24V ±20% (4 - 20mA version only supports direct current supply)

Output: Two Independent 4 - 20mA Analog Current Signals for Temperature and Humidity

Maximum Load Resistance: ≤ 500 Ω

Overall Power Consumption: ≤ 20mA

Compatible Wiring Wire Diameter: 0.33 - 1.65 mm²

IV. Environmental Operating Conditions Parameters

Transmitter Shell Working Temperature: -40℃ ~ +70℃

Storage Temperature: -30℃ ~ +70℃

Operating Humidity: 0 - 95% RH, No Condensation

Protection Grade IP65, Supports Outdoor Installation in Open Air, Dustproof and Waterproof Splash Protection

V. Hardware Structure Parameters

Shell Material: PC-ABS Flame-retardant Plastic, UL94-V0 Fire Resistance Grade

Installation Form: Wall-Hanging Type, Externally Mounted Integrated Sensing Probe

Probe Comes with Breathing Protective Shell, Isolates Dust, Mosquitoes

VI. Product Features

Outdoor Special Wall-Hanging Structure, IP65 Waterproof, Suitable for Roof and Exterior Wall Open-Air Environments

Dual 4 - 20mA Industrial Standard Output, Can Be Directly Connected to PLC, Building DDC Control System

Digital Sensing Chip, Small Temperature Drift, Excellent Long-Term Stability, Long Maintenance Calibration Cycle

Resistant to Dust, Rain, Outdoor Complex Environmental Interference

CE Certification, Compatible with HVAC Building Automation, Meteorological Monitoring, Outdoor Environment Monitoring of Energy Storage Station

VII. Application Scenarios

Building and Structure Outdoor Environmental Monitoring, Outdoor Temperature and Humidity Collection for Photovoltaic Power Stations / Energy Storage Stations, Exterior Wall Sensing for Greenhouses, Factory Walls, Outdoor Air Sampling for Central Air Conditioning, Smart Park Environmental Monitoring, Outdoor Environment Detection for Cold Chain Factories

Specifications: