RELATIVE HUMIDITY/TEMPERATURE TRANSMITTERSDual Channel Design for Simultaneous 4 to 20 mA Output SignalsDWYER INSTRUMENTS, INC. | dwyer-inst.com244Humidity/TemperatureTransmittersAIR QUALITY5/16 [7.925]2-23/32[68.88]2-13/32[60.96]1/2 [12.70]2-1/4 [57.15]1-1/2[38.10]5/32[3.81]7/8[22.23]The Series 657 Relative Humidity/Temperature Transmitters provide two 4 to 20 mA channels to produce separate output signals for both relative humidity and temperature. These devices deliver ±2% accuracy for humidity and ±1°F for temperature measurements. Stainless steel probe can be easily mounted to most ductwork using either of the two optional kits below.FEATURES/BENEFITS• Polymer film humidity and thin film RTD temperature sensors offer highly reliable and stable measurements.• Remote mount housing offers installation flexibility (657-1)• Rugged die-cast aluminum housing is great for industrial applications (657C-1)APPLICATIONS• Cleanroom monitoring • HVAC/building control monitoringSPECIFICATIONSService: Dry clean air.Range: Relative humidity: 0 to 100%; Temperature: 32 to 212°F (0 to 100°C).Accuracy: Relative humidity: ±2% (10 to 90% RH), ±3% (0 to 10% and 90 to 100% RH); Temperature ±1°F (0.5°C).Temperature Limits: 32 to 140°F (0 to 60°C).Pressure Limits: 1 psi (.07 bar).Compensated Temperature Range: 32 to 140°F (0 to 60°C).Power Requirements: 10 to 35 VDC.Output Signal: 2 channels each 4 to 20 mA. Loop powered on the RH channel.Electrical Connections: 4 screw type terminals.Mounting Orientation: Mount in any position.Probe: 657-1: Stainless steel 5/16˝ x 10˝ (0.8 x 25.4 cm); 657C-1: 5/16˝ x 9-1/10˝ (0.8 x 23.1 cm).Weight: 657-1: 5.5 oz (156 g); 657C-1: 10 oz (284 g).11-7/8 [302]9-1/10 [231]4-13/32[112.0]3-5/8[92.4]2-15/32 [62.60]1/2 NPT1-5/32 [29.35]3-1/2[88.90]1-11/32 [34.15]A-158A-159HUMIDITY/TEMPERATURE TRANSMITTERRemote Mount, Field Replaceable Sensor Filter, Up to 16´ CableThe Series RH-R Humidity and Temperature Transmitter is the ideal transmitter for those applications where space is limited. The compact sensor is protected by a removable filter. It can be mounted up to 16 feet away from the weatherproof base. The Series RH-R is ideal for environmental chambers, rubber bladder burst detection and air handler applications.FEATURES/BENEFITS• Cable lengths from 4 to 16´• Remote housing allows for flexibility sensing where space may be limitedAPPLICATIONS • Process system monitoring• Environmental chambers• Air economizersSPECIFICATIONSService: Dry clean air.Relative Humidity Range: 0 to 100% RH.Temperature Range: -40 to 140°F (-40 to 60°C).Accuracy: ±2% @ 10-90%.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).Power Requirements: 10 to 35 VDC.Output Signal: 4 to 20 mA loop powered.Response Time: Less than 15 s.Electrical Connections: Terminal block.Conduit Connection: 1/2˝ NPT.Process Connection: 1/2 NPSM.Drift: < 1%/year.RH Sensor: Capacitance polymerCable Length: Up to 16´.Housing Material: Polycarbonate, aluminum enclosure.Enclosure Rating: NEMA 4X (IP66).5-1/8[130.18]3-45/64[94.06]4-1/32[102.39]2-41/64[67.07]2-1/4[57.15]55/64[21.83]2-37/64[65.48]2-29/64[11.51]5/8[15.88]657657CSERIES RH-RSERIES 657®ElectricalProcessProbe ConnectionsMODEL CHARTModelDescription657-1657C-1RH/temperature transmitterRH/temperature transmitter - conduit housingOPTIONSTo order add suffix:Description-NISTNIST traceable humidity calibration certificateExample: 657C-1-NISTACCESSORIESModelDescriptionA-158A-159Split flangeMounting glandMODEL CHARTModelCable LengthDescriptionOutputModelCable LengthDescriptionOutputRHU-R004RHU-R008RHU-R012RHU-R0164´8´12´16´HumidityHumidityHumidityHumidityCurrentCurrentCurrentCurrentRHT-R004RHT-R008RHT-R012RHT-R0164´8´12´16´Humidity/temperatureHumidity/temperatureHumidity/temperatureHumidity/temperatureCurrentCurrentCurrentCurrentNext >