Part Numbers
NSA-HH/RH2-CP-D-C
NSA-HH/RH3-CP-D-C
The Carrier Relative Humidity with Thermistor Duct Series utilizes a thermoset polymer capacitive sensing element with a factory fitted hydrophobic filter to improve its moisture resistance. The sensing elements multilayer construction also provides excellent resistance in applications where dust, dirt, oils and common environmental chemicals are found. The RH duct sensors include on board DIP switches which allow the user to select the desired output signal and can be powered by AC or DC power sources.
Applications
Humidification, Dehumidification, Supply / Discharge / Return Air, Economizers, Clean Rooms, Data Centers, Process Control, Schools, Hospitals, Office Buildings
| 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 Material | Filter Material: |
''EH'' Enclosure: 304 Series Stainless Steel | 304 Series Stainless Steel ''-4X'' Enclosure: Schedule 40 PVC (White) | Slotted PVC without filter |
| Sensing Tube Dimensions (Length x Diameter): |
''-EH'' Models with Sintered Filters: 7.75'' (196.85 mm) x 0.75'' (19.05 mm) ''-4X'' Models: 7.20'' (182.88 mm) x 0.84'' (21.34 mm) |
| Product Dimensions (L x W x D): | See Dimensional Drawing |
| Product Weight: | 1.22 lbs. (0.55 kg) |
| Agency Approvals: | CE, RoHS2, WEEE |
US 6434 
BR 3718 
VN 3317 
AU 1467 
TH 1271 
JP 1256 
CA 955 
SG 930 
