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Mounted through a single-gang box, this transmitter measures relative humidity in room air to ±2% accuracy using a thermoset polymer capacitive element behind a hydrophobic filter. A matched 10,000 ohm Type II thermistor shares the housing, so humidity and temperature reach the controller from one wall plate. Field-selectable outputs cover 0-5 and 0-10 V DC and 4-20 mA.
Mounted through a single-gang box, this transmitter measures relative humidity in room air to ±2% accuracy using a thermoset polymer capacitive element behind a hydrophobic filter. A matched 10,000 ohm Type II thermistor shares the housing, so humidity and temperature reach the controller from one wall plate. Field-selectable outputs cover 0-5 and 0-10 V DC and 4-20 mA.
The ACI Relative Humidity with Thermistor Wall Plate Series utilizes a thermoset polymer capacitive sensing element with a factory applied hygroscopic filter to deliver a proportional analog voltage output signal. The hygroscopic filter provides added resistance to moisture, dust, and other chemicals for greater long term reliability. The RH Stainless Plate 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 properly installed.
Features
Applications
| RH Measurement Range | 0 to 100% |
| RH Accuracy @ 77°F (25°C) | ± 2% or 3% from 10 to 95% |
| RH Stability | Repeatability | Sensitivity | Less than 2% drift / 5 years | 0.5% RH | 0.1% RH |
| Thermistor Accuracy 32 to 158°F (0 to 70°C) | ± 0.36°F (0.2°C) |
| RH Output Load Resistance | 4K Ohms Minimum |
| RH Output Signal | 3-wire: 0 to 5 or 0 to 10 V DC |
| RH Response Time (T63) | 20 Seconds Typical |
| RH Transmitter Stabilization Time | 30 Minutes (Recommended time before doing accuracy verification) |
| Thermistor Sensor Response Time (T63) | 10 Seconds nominal |
| RH Supply Current (VA) | 8 mA maximum (0.32 VA) |
| RH Supply Voltage (Reverse Polarity Protected) | 0 to 5 V DC: 12 to 40 V DC / 18 to 28 V AC | 0 to 10 V DC: 18 to 40 V DC / 18 to 28 V AC |
| Thermistor Power Dissipation Constant | 3 mW/°C |
| RH Sensor Type | Capacitive with Hydrophobic Filter |
| Lead Wire Length | Conductor Size | 14" (35.6 cm) | 22 AWG (0.65 mm) |
| 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) |
| Insulation | Rating | Etched Teflon (PTFE) Colored Leads | Mil Spec 16878/4 Type E |
| Operating RH Range | 0 to 95% RH, non-condensing (Conformally Coated PCB's) |
| Nominal Thermistor Resistive Output @ 77°F (25°C) (Lead Wire Colors) | 10KΩ (White/Green) |
| Operating Temperature Range | -40 to 140°F (-40 to 60°C) |
| Storage Temperature Range | -40 to 149°F (-40 to 65°C) |
| Foam Flammability Rating | FMVSS-302 |
| Foam Material | Foam Thickness | Cross-linked LPDE (White) | 0.25" (6.35 mm) |
| Sintered Filter Material | 304 Series Stainless Steel |
| Wall Plate Material | 430 Stainless Steel (Brushed Stainless Steel Finish) |
| Product Dimensions (L x W x H) | 3.85 x 2.85 x 3.05" (97.8 x 72.4 x 77.5 mm) |
| Product Weight | 0.23 lbs (104 g) |
| Agency Approvals | CE, UKCA, RoHS, WEEE |
| RH Measurement Range | 0 to 100% |
| RH Accuracy @ 77°F (25°C) | ± 2% or 3% from 10 to 95% |
| RH Stability | Repeatability | Sensitivity | Less than 2% drift / 5 years | 0.5% RH | 0.1% RH |
| Thermistor Accuracy 32 to 158°F (0 to 70°C) | ± 0.36°F (0.2°C) |
| RH Output Load Resistance | 4K Ohms Minimum |
| RH Output Signal | 3-wire: 0 to 5 or 0 to 10 V DC |
| RH Response Time (T63) | 20 Seconds Typical |
| RH Transmitter Stabilization Time | 30 Minutes (Recommended time before doing accuracy verification) |
| Thermistor Sensor Response Time (T63) | 10 Seconds nominal |
| RH Supply Current (VA) | 8 mA maximum (0.32 VA) |
| RH Supply Voltage (Reverse Polarity Protected) | 0 to 5 V DC: 12 to 40 V DC / 18 to 28 V AC | 0 to 10 V DC: 18 to 40 V DC / 18 to 28 V AC |
| Thermistor Power Dissipation Constant | 3 mW/°C |
| RH Sensor Type | Capacitive with Hydrophobic Filter |
| Lead Wire Length | Conductor Size | 14" (35.6 cm) | 22 AWG (0.65 mm) |
| 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) |
| Insulation | Rating | Etched Teflon (PTFE) Colored Leads | Mil Spec 16878/4 Type E |
| Operating RH Range | 0 to 95% RH, non-condensing (Conformally Coated PCB's) |
| Nominal Thermistor Resistive Output @ 77°F (25°C) (Lead Wire Colors) | 10KΩ (White/Green) |
| Operating Temperature Range | -40 to 140°F (-40 to 60°C) |
| Storage Temperature Range | -40 to 149°F (-40 to 65°C) |
| Foam Flammability Rating | FMVSS-302 |
| Foam Material | Foam Thickness | Cross-linked LPDE (White) | 0.25" (6.35 mm) |
| Sintered Filter Material | 304 Series Stainless Steel |
| Wall Plate Material | 430 Stainless Steel (Brushed Stainless Steel Finish) |
| Product Dimensions (L x W x H) | 3.85 x 2.85 x 3.05" (97.8 x 72.4 x 77.5 mm) |
| Product Weight | 0.23 lbs (104 g) |
| Agency Approvals | CE, UKCA, RoHS, WEEE |
