EHRHT-2-I-F-1

® EHRH Waterproof RH Transmitter The EHRH Relative Humidity Transmitter is a waterproof RH sensing element and package which is ideally suited for monitoring relative humidity in high RH/harsh environment applications or where washdowns are required. The unit is designed for continuous monitoring of relative humidity and temperature and is available in ±2% accuracy. Both the sensor and electronics are contained in an epoxy-hardened enclosure designed for continuous service. A water-tight membrane filter is installed over the RH sensor for increased protection against high RH, contaminants and washdowns. The unit is designed to withstand 100% saturation. Features • Waterproof sensing element and housing • Compact transmitter with built-in sensor • Bulk polymer resistance RH sensor • Resistant to contamination • Thermistor temperature measurement • Temperature compensation The sensor incorporates a bulk polymer resistance element. The polymer is impervious to most contaminants and, since it is a bulk resistance device, surface contamination such as dust will not alter the accuracy of the readings. Applications The unit is provided with continuous temperature compensation which adjusts for temperature-induced change in the RH sensor output. The compensation provides high measurement accuracy over the entire operating range of the instrument. • Food processing • Greenhouses • Textile mills • Shipping containers • Swimming pools • Hospital suites Amphenol Advanced Sensors EHRH Specifications Humidity Temperature Sensing Element Sensing Element Resistance change of bulk polymer sensor Accuracy at 77°F (25°C) ±2% RH. 30 to 95% RH including hysteresis, linearity, and repeatability. Temperature Effect Less than 0.11% per ºF (0.06% per ºC) Thermistor, 10 KΩ at 77°F (25ºC), two-wire measurement Accuracy at 77°F (25ºC) ±0.5ºF (±0.3ºC). Also available with 100 (RTD with 4 mA to 20 mA analog output. Sensitivity Consult factory for further information 0.1% RH Part Number Configuration Repeatability 0.5% RH Order Codes: [1]-[2]-[3]-[4] Linearity 1 Model Designation See accuracy EHRH-2 Relative Humidity and 10K thermister outputs Hysteresis EHRHT-2 Relative Humidity and signal conditioned temperature outputs Less than 1% 2 Output(s) Operating Range, Sensor & Electronics I Current (4-20mA) EHRH and EHRHT 0% to 100% RH, -20ºC to 54ºC (-4ºF to 129ºF) V5 Voltage (0-5 VDC) EHRH only V10 Voltage (0-10 VDC) EHRH only Maximum Air Velocity 10,000 ft/minimum (3,048 m/minimum) 3 Wiring Output Ranges 4 to 20 mA current, two-wire, loop-powered for 0 to 100%, RH (standard) into 0 to 900 Ω 4 F Front, with waterproof connector B Back, flying leads Temperature Channel Range (EHRHT Only) 1 -20°F to +140°F Temperature Rage (Standard Range) 2 0°F to +150°F Temperature Range 3 0°F to 100°F Temperature Range ±20%, non-interactive 4 +32°F to +132°F Temperature Range Span 5 +50°F to +130°F Temperature Range 6 -40°F to +140°F Temperature Range 7 Custom Temperature Range Adjustment Zero ±10%, non-interactive Long Term Stability Less than 2% drift per year typical Power Supply Voltage 12 to 36 VDC Wiring Connection Deutsch four-position waterproof connector (For front wiring only_flying leads for back wiring). Amphenol Advanced Sensors Example: EHRH-2-V5-F RH transmitter with 10K thermistor, 2% accurate RH, 0-5 volt RH output and front-wired (waterproof connector). All units have a standard 3-Point factory calibration (30, 50, 80% RH @ 25°C) standard relative humidity output range is 0 to 100%. Standard temperature output range is –20°F to +140°F. Standard relative humidity and temperature output signal is 4-20 mA. www.telaire.com www.amphenol-sensors.com © 2014 Amphenol Corporation. All Rights Reserved. Specifications are subject to change without notice. Other company names and product names used in this document are the registered trademarks or trademarks of their respective owners. AAS-920-233D-03/2014