Made in Japan
Manufacturer: Watanabe Electric Industry Co. Ltd
Model: HD4877T02

The HD4877T02 is a duct type dew point/temperature detector capable of stable and highly accurate measurement. A high accuracy of ±1°C DP has been achieved over a wide range of temperature and humidity. Stable performance is demonstrated not only for general air conditioning but also for moisture monitoring in clean rooms and industrial air.

Specifications

• model number: HD4877T02
• Sensor (dew point): Capacitive polymer humidity sensor
• Sensor (temperature): Thermistor NTC 10KΩ
• Dew point measurement range: -20 to +80°C DP
• Temperature measurement range: -20 to +80°C
• Accuracy (dew point): ±1°C DP (0 to +40°C, 10 to 90% RH)
  ±2°C DP (-20 to 0°C, +40 to +80°C, 5 to 98% RH)
• Accuracy (temperature): ±0.3°C (0 to +70°C)
  ±0.4°C (-20 to 0°C, +70 to +80°C)
• power supply: AC 24V ±10% or DC 24V ±10%
• Output (dew point): 4 to 20mA DC (equivalent to -20 to +80°C DP)
• Output (temperature): 4 to 20mA DC (equivalent to -20 to +80°C)
• Load resistance: 500Ω or less
• Permissible ambient conditions: 0 to +60°C, 0 to 95% RH (non-condensing)
• Case material: Heat-resistant ABS
• Case protection class: IP66

Option

• Duct mounting bracket (HOP-D2)