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MAXMAC A54-25 Temperature and Humidity Sensor
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PRODUCT FEATURES

A54-25 Temperature and Humidity Sensor

  1. Temperature and Humidity Monitoring: CMOSens® sensing technology provides temperature and relative humidity measurements for HVAC systems, fresh-air units, air handling units and indoor comfort management.
  2. Environmental Measurement: Temperature measurement range: −20°C to 85°C, with 0.1°C resolution and ±2°C accuracy. Humidity measurement range: 1–99% RH, with 0.1% RH resolution and ±5% RH accuracy.
  3. RS485 Integration: 12–24 VDC power supply and RS485 communication through a GH1.25-4P locking connector support integration into ventilation and environmental control equipment.
  4. Compact, Low-Power Design: 66.4 × 51.4 × 19 mm PC+ABS V0 flame-retardant housing, with standby power consumption ≤0.2 W and power consumption ≤0.5 W. Operate within −10°C to 50°C and 0–95% RH, non-condensing.

TECHNICAL DATA

A54-25 Temperature and Humidity Sensor Specifications

Product & Electrical

Product Name
A54-25 Temperature and Humidity Sensor
Model
A5425
Functions
Temperature + Humidity monitoring
Operating Voltage
12–24 VDC
Operating Current
Average: 10 mA @ 12 VDC; Peak: <20 mA (10 ms), at room temperature
Standby Power Consumption
≤0.2 W
Power Consumption
≤0.5 W

Temperature Detection

Sensing Principle
CMOSens®
Measurement Range
−20°C to 85°C
Resolution
0.1°C
Accuracy
±2°C

Humidity Detection

Sensing Principle
CMOSens®
Measurement Range
1–99% RH
Resolution
0.1% RH
Accuracy
±5% RH

Mechanical & Communication

Dimensions
66.4 × 51.4 × 19 mm
Housing Material
PC+ABS, V0 flame-retardant
Communication
RS485
Interface
4-pin socket (+ / A+ / B− / GND)
Physical Connector
GH1.25-4P locking connector
Operating Environment
−10°C to 50°C, 0–95% RH, non-condensing
Storage Environment
−20°C to 65°C, 0–99% RH, non-condensing

Note: The matching GH1.25-4P locking terminal cable should be prepared by the user for connection.

Document: MAXMAC-A5425-EN Rev.1

TECHNICAL DATA

A54-25 Datasheet Downloads

Name Type Format Size Download
A54-25 Temperature and Humidity Sensor DatasheetDatasheetPDF2.9 MB
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