HT-200

Overview

Introduction

The HT-200 relative Humidity/Temperature probe combines a high accuracy, capacitance type humidity sensor and a precision solid state temperature sensor in one probe. The integrated sensor block has excellent long term stability and is highly resistant to chemical vapors and other contaminants. Dual outputs provide humidity and temperature as 0-1V linear voltages. The probe can be easily installed in naturally ventilated (multi-plate) and aspirated radiation shields. The humidity measurement is accurate to ±2% from 20% to 80% RH. The temperature accuracy is ±1°C from 0°C to +70°C and ±0.6°C at 25°C. The probe is particularly suited for battery applications, drawing only 500 μA of supply current.

Features

Designed for meteorogical applications
Relative humidity and temperature outputs
Fully recovers from condensing environments
Precision accuracy ±2% RH, ±0.6°C
Low power, 500 µA typical supply current
Wide supply range: 6-40VDC

Specifications

Ordering Codes

Code	Description
HT-200-FG17	Humidity & Temperature probe (Stainless steel mesh filter Cap)

Specifications

Relative Humidity
Sensor	Planar Capacitive Polymer
Range	0 to 100% RH
Accuracy @ 25°C	±2% from 20% to 80%, ±3% from 0% to 20% and 80% to 100%
Resolution	0.4% RH
Response Time	20 sec with FG16 Cap (for clean environment), 1 min with FG17 Cap (Mesh filter against dirt), 3 min with FG18 Cap (PTFE filter for extreme conditions)
Temperature
Sensor	Integral band gap PTAT
Temperature Scale	–50°C to 150°C
Accuracy	±0.6°C at 25°C, ±1°C from 0°C to +70°C
Resolution	0.2°C
Electrical Characteristics
Supply voltage	6…40 VDC
Supply current	550 µA max
Reverse Polarity Protection	50 V max
Humidity output	0-1V, %RH = V_out x 100
Temperature Output	0-1V, Tc = V_out x 200 – 50
Min. Load Resistance	5 kΩ
Max. Output Load Capacitance	5 nF
Cable length	1.2 m
Environmental Conditions
Storage Temperature	–55°C to 85°C
Operating Temperature	–40°C to 85°C
Operating RH Range	0 to 100% RH, non-condensing