Dwyer Instruments, Inc., the preferred source for your complete range of practical and affordable instrumentation, is announcing the release of its NEW SERIES RHP HUMIDITY AND TEMPERATURE TRANSMITTER.
    The Series RHP Humidity/Temperature Transmitter combines the voltage or current humidity transmitter output with a passive temperature thermistor or RTD output. The polymer capacitance humidity sensor is not affected by condensation, fog, high humidity, or contaminants. The humidity sensors are available with 2% or 3% accuracies. Duct mounted transmitters are available with an optional two-line alphanumeric LCD display. The Series RHP is available with interchangeable filter options as well as replaceable sensors.


• Relative Humidity Range: 0 to 100% RH. • Temperature Range: -40 to 140°F (-40 to 60°C). • Accuracy, RH: Model RHP2 ±2% 10-90% RH @ 25°C; Model RHP3 ±3% 20-80% RH @ 25°C. • Accuracy, Thermistor Temp Sensor: ±0.22°C @ 25°C (±0.4°F @ 77°F). • Accuracy, RTD Temp Sensor: DIN Class B; ±0.3°C @ 0°C (±0.54°F @ 32°F). • Hysteresis: ±1%. • Repeatability: ±0.1% typical. • Temperature Limits: -40 to 140°F (-40 to 60°C). • Storage Temperature: -40 to 176°F (-40 to 80°C). • Compensated Temperature Range: -4 to 140°F (-20 to 60°C). • 4-20 mA Loop Powered Models: Power Requirements: 10-35 VDC. Output Signal: 4-20 mA. • 0-10V Output Models: Power Requirements: 15-35 VDC or 15-29 VAC. Output Signal: 0-10V @ 5 mA max. • Response Time: 15 seconds. • Electrical Connections: removable screw terminal block. • Conduit Connection: Duct Mount: 1/2" NPS; OSA: 1/2" (22.3 mm). • Drift: <1% RH/year. • RH Sensor: Capacitance polymer. • Temperature Sensor: Curves A,B,C; Thermistor; Curves D,E; Platinum RTD DIN 385. • Enclosure: Duct Mount: PBT; OSA: Polycarbonate. • Enclosure Rating: NEMA 4X (IP65) for OSA mount only. • Display: Duct Mount only, Optional 2-line alpha numeric, 8 characters/line. • Display Resolution: RH: 0.1%; 0.1°F (0.1°C). • Weight: Duct Mount: .616 lb (.3 kg) OSA: 1 lb (.45 kg). • Agency Approvals: CE.
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