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Outside Air Temperature/RH Sensors
NSA-OA-RH

Part Numbers

NSA-HH/RH2-CP-O-C
NSA-HH/RH3-CP-O-C

The Carrier Relative Humidity with Thermistor Outside Air Series utilizes a thermoset polymer capacitive sensing element with factory applied hygroscopic filter to deliver a proportional analog current or voltage output signal. The hygroscopic filter provides added resistance to moisture, dust, and other chemicals for greater long term reliability. The RH Outside Air transmitter features integral DIP switches for field selection of the proper output signal and supply voltage to meet your applications requirements. Each unit also contains 0%, 50%, and 100% test options to verify that the transmitter is both working and wired properly.

Applications

Monitor Outdoor Air Humidity, Economizer Control, Psychrometric calculations such as Enthalpy and Dew point, Wash down Applications

RH Supply Voltage (Reverse Polarity Protected): 4-20 mA: 250 Ohm Load: 15 - 40 VDC / 18 - 28 VAC
500 Ohm Load: 18 - 40 VDC / 18 - 28 VAC
0-5 VDC: 12 - 40 VDC / 18 - 28 VAC
0-10 VDC: 18 - 40 VDC / 18 - 28 VAC
RH Supply Current (VA): Voltage Output: 8 mA max (0.32 VA) | Current Output: 24 mA max (0.83 VA)
RH Output Load Resistance: 4-20 mA: 700 Ohms max | 0-5 VDC or 0-10 VDC: 4K Ohms min
RH Output Signal: 2-wire: 4 - 20 mA (default) | 3-wire: 0-5 or 0-10 VDC and 4 - 20 mA (Field Selectable)
RH Accuracy @ 77°F (25°C): +/- 1% over 20% RH Range between 20 to 90% | +/- 2%, 3%, or 5% from 10 to 95%
RH Measurement Range: 0-100%
Operating RH Range: 0 to 95% RH, non-condensing (Conformally Coated PCB's)
Operating Temperature Range: -40 to 140°F (-40 to 60°C)
Storage Temperature Range: -40 to 149°F (-40 to 65°C)
RH Stability | Repeatability | Sensitivity: Less than 2% drift / 5 years | 0.5% RH | 0.1% RH
RH Response Time (T63): 20 Seconds Typical
RH Sensor Type: Capacitive with Hydrophobic Filter
RH Transmitter Stabilization Time: 30 Minutes (Recommended time before doing accuracy verification)
RH Connections | Wire Size: Screw Terminal Blocks (Polarity Sensitive) | 16 (1.31 mm²) to 26 AWG (0.129 mm²)
RH Terminal Block Torque Rating: 4.43 to 5.31 lb-in (0.5 to 0.6 Nm)
RH NIST Test Points: Default Test Points: 3 Pts (20%, 50% & 80%) or 5 Pts (20%, 35%, 50%, 65% & 80%)
1% NIST Test Points: 5 Pts within selected 20% Range (ie. 30%-50% are 30, 35, 40, 45 & 50)
Nominal Thermistor Resistive Output @ 77°F (25°C) | Lead Wire Colors: 10KΩ | White/Green
Thermistor Accuracy 32-158°F (0-70°C): +/- 0.36°F (0.2°C)
Thermistor Power Dissipation Constant: 3 mW/°C
Thermistor Sensor Response Time (T63): 10 Seconds nominal
Lead Wire Length | Conductor Size: 14" (35.6 cm) | 22 AWG (0.65 mm)
Insulation | Rating: Etched Teflon (PTFE) Colored Leads | Mil Spec 16878/4 Type E
Enclosure Specifications (Material, Flammability, Temperature, NEMA/IP Rating) "-EH" Enclosure: ABS Plastic; UL94-V0; -40 to 140°F (-40 to 60°C)
"-4X" Enclosure: Polystyrene Plastic; UL94-V2; -40 to 158°F (-40 to 70°C); NEMA 4X (IP 66)
Sensing Tube Dimensions (Length x Diameter): "-EH" Models: 3.00" (76.20 mm) x 1.125" (28.75 mm)
"-4X" Models: 4.73" (120.14 mm) x 0.845" (21.46mm)
Product Dimensions (L x W x D): See Dimensional Drawing
Product Weight: 0.59 lbs. (0.27 kg)
Agency Approvals: CE, RoHS2, WEEE
RH Supply Voltage (Reverse Polarity Protected): 4-20 mA: 250 Ohm Load: 15 - 40 VDC / 18 - 28 VAC
500 Ohm Load: 18 - 40 VDC / 18 - 28 VAC
0-5 VDC: 12 - 40 VDC / 18 - 28 VAC
0-10 VDC: 18 - 40 VDC / 18 - 28 VAC
RH Supply Current (VA): Voltage Output: 8 mA max (0.32 VA) | Current Output: 24 mA max (0.83 VA)
RH Output Load Resistance: 4-20 mA: 700 Ohms max | 0-5 VDC or 0-10 VDC: 4K Ohms min
RH Output Signal: 2-wire: 4 - 20 mA (default) | 3-wire: 0-5 or 0-10 VDC and 4 - 20 mA (Field Selectable)
RH Accuracy @ 77°F (25°C): +/- 1% over 20% RH Range between 20 to 90% | +/- 2%, 3%, or 5% from 10 to 95%
RH Measurement Range: 0-100%
Operating RH Range: 0 to 95% RH, non-condensing (Conformally Coated PCB's)
Operating Temperature Range: -40 to 140°F (-40 to 60°C)
Storage Temperature Range: -40 to 149°F (-40 to 65°C)
RH Stability | Repeatability | Sensitivity: Less than 2% drift / 5 years | 0.5% RH | 0.1% RH
RH Response Time (T63): 20 Seconds Typical
RH Sensor Type: Capacitive with Hydrophobic Filter
RH Transmitter Stabilization Time: 30 Minutes (Recommended time before doing accuracy verification)
RH Connections | Wire Size: Screw Terminal Blocks (Polarity Sensitive) | 16 (1.31 mm²) to 26 AWG (0.129 mm²)
RH Terminal Block Torque Rating: 4.43 to 5.31 lb-in (0.5 to 0.6 Nm)
RH NIST Test Points: Default Test Points: 3 Pts (20%, 50% & 80%) or 5 Pts (20%, 35%, 50%, 65% & 80%)
1% NIST Test Points: 5 Pts within selected 20% Range (ie. 30%-50% are 30, 35, 40, 45 & 50)
Nominal Thermistor Resistive Output @ 77°F (25°C) | Lead Wire Colors: 10KΩ | White/Green
Thermistor Accuracy 32-158°F (0-70°C): +/- 0.36°F (0.2°C)
Thermistor Power Dissipation Constant: 3 mW/°C
Thermistor Sensor Response Time (T63): 10 Seconds nominal
Lead Wire Length | Conductor Size: 14" (35.6 cm) | 22 AWG (0.65 mm)
Insulation | Rating: Etched Teflon (PTFE) Colored Leads | Mil Spec 16878/4 Type E
Enclosure Specifications (Material, Flammability, Temperature, NEMA/IP Rating) "-EH" Enclosure: ABS Plastic; UL94-V0; -40 to 140°F (-40 to 60°C)
"-4X" Enclosure: Polystyrene Plastic; UL94-V2; -40 to 158°F (-40 to 70°C); NEMA 4X (IP 66)
Sensing Tube Dimensions (Length x Diameter): "-EH" Models: 3.00" (76.20 mm) x 1.125" (28.75 mm)
"-4X" Models: 4.73" (120.14 mm) x 0.845" (21.46mm)
Product Dimensions (L x W x D): See Dimensional Drawing
Product Weight: 0.59 lbs. (0.27 kg)
Agency Approvals: CE, RoHS2, WEEE

California residents please see Proposition 65