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Met One- 083F/085A Relative Humidity Sensor & Relative Humidity / Temperature Sensor

The Met One 083F/085A is a high-precision, low-power sensor designed to measure relative humidity and temperature in both naturally and fan-aspirated radiation shields. Its fast response, solid-state design, and compact size make it ideal for environmental monitoring applications.

  • Wide Measurement Range & Accuracy: 0–100% RH (±2%) and −30°C to +50°C temperature (±0.15°C).
  • Fast Response: Less than 10 seconds to reach 90% of final reading under 2 m/s airflow.
  • Low Power Operation: Draws only 4 mA at 12 VDC; standard output 0–1 VDC (0–5 V optional).
  • Compact & Durable: Solid-state design, easy to clean, lightweight (70.9 g), fits in both motor and naturally aspirated shields.

Description

The Met One 083F/085A Relative Humidity and Temperature Sensor is a high-precision sensor designed for reliable environmental monitoring in both naturally aspirated and motor-aspirated shield setups. Using a thin-film polymer capacitor as the sensing element, it measures relative humidity over a full 0–100% range with ±2% accuracy and a fast 10-second response time at 2 m/s aspiration. The sensor is complemented by a precision multi-element thermistor for temperature measurements between −30°C and +50°C, providing ±0.15°C accuracy. Outputs include standard 0–1 VDC for humidity and resistive output for temperature, with optional 0–5 VDC for flexible system integration.

Compact and lightweight, the 083F/085A is easily installed in weather stations or environmental monitoring networks. Its solid-state design ensures durability and rapid response, consuming just 4 mA at 12 VDC, making it energy-efficient for remote deployments. The sensors are simple to maintain, easily cleaned with distilled water, and suitable for use with the Met One 076B motor-aspirated or naturally aspirated radiation shields. They are ideal for applications requiring precise, real-time monitoring of ambient humidity and temperature conditions.

Features

  • Digital devices with solid state design are used.
  • Quick reaction of under 5 seconds to 90% of the final value.
  • 4 mA of electricity is used sparingly at 12 VDC.
  • Simple to clean with distilled water.
  • 0-100% RH output is represented by 0-1V.
  • May be powered by a 12 VDC battery.

Specifications

Power
Input Power: 4 mA at 12 VDC (10-14 VDC)
Relative Humidity
Sensing Element: Thin film polymer capacitor
Range: 0 – 100% relative humidity
Temperature Operation Range: -50°C to +50°C (-58°F to 122°F)
Response Time: 10 sec. with 2 m/s aspiration
Temperature Coefficient: 0.04% RH/°C
Accuracy: ±2.0% from 0 – 100% humidity
Output: 0 to 1 VDC – Standard (0 to 5.0 VDC Optional)
Temperature
Temperature Sensor: Thermistor (precision multi-element)
Temperature Operation Range: -30°C to +50°C (-22°F to 122°F)
Accuracy: ±.15°C (0.27°C)
Output: Resistive
Physical
Weight: 2.5 oz (70.9 g)
Size: .75 in (19.05 mm) diameter, 7.5 in (190.5 mm) length
Ordering Information
083F-6 For use with the 076B Motor Aspirated Shield
083F-35 For use with the Naturally Aspirated Shield – Requires cable P/N 2348 (Specify Length ft/m)
085A-6 For use with the 076B Motor Aspirated Shield
085A-35 For use with the Naturally Aspirated Shield – Requires cable P/N 2348 (Specify Length ft/m)

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