Building Intelligence

Relative Humidity Sensor

Relative Humidity Sensors used in both indoor and outdoor investigative research and building science applications.

Overview
Specs
Connectivity

Overview

General Description

Based on the rugged Humirel HTS2010 humidity sensor the HTM2500 is a dedicated humidity and temperature transducer designed for applications where a reliable and accurate measurement is needed.

Typical Applications

Building science research

Building envelope cavity validation
Indoor and outdoor air quality analysis

Restoration

Verification of equipment status
Drying progress

Industrial Applications

Process control
Hygrostat

Features

Hermetic Housing
Humidity calibrated within ±2% @55% RH
Integrated Thermistor – MF52 pearl-shaped precision NTC thermistor (cable version)
Small size
Compatible with SMT Mobile and Industrial WiDAQ
Full interchangeability
High reliability and long term stability
Not affected by water immersion
Instantaneous de-saturation after long period in saturation phase
Fast response time suitable for low voltage wireless applications.
High resistance to chemicals
Unique solid polymer structure

Specs

Electrical Characteristics
Operating Voltage (with SMT WiDAQ)	0V to 5VDC
Sensing Element	HTM2500

Environmental
Operating Temperature	-30° to 70°C
Operating Humidity Range	0% to 100% RH
Storage Temperature	-40° to 85°C
Storage Humidity	0% to 100% RH

Humidity Characteristics
Humidity Measuring Range	1% to 99% RH
Relative Humidity Accuracy (10 to 95% RH)	±3 to ±5 %RH
WiDAQ Supply Voltage	5VDC
Current Consumption	0.4mA
Temperature Coefficient (10°C to 50°C)	±0.1 %RH/°C
Average Sensitivity from 33% to 75% RH	+25 mV/%RH
Recovery time after 150 hours of condensation	10 seconds
Humidity Hysteresis	±1.5 %RH
Long term stability	±0.5 %RH/yr
Time Constant (at 63% signal, static) 33% to 76% RH	5 seconds

Thermistor Characteristics
Rated Resistance R25	10 to 250 KΩ
B Value (25/50°C)	4150K
Operating Temperature	-55° to 125°C
Tolerance	1%

Approvals/Regulatory
Passed Meas-France qualification process	Vibration, shock, storage temperatures, high temperature and humidity and ESD.
Chemical conditions tested	Salt atmosphere, SO2, NOx, NO, CO, Softener, Soap, Toluene, acids (H2SO4, HNO3, HCI), HMDS, insecticide, cigarette smoke. HTM255 is not light sensitive.