Type II Relative Humidity Thermistor 10 kΩ

FEATURES

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. Each unit also contains 0%, 50%, and 100% test options to verify that the transmitter is both working and wired properly. Field calibration can be performed by using the increment and decrement calibration DIP switches without the need to replace the sensing element. These enhancements provide increased flexibility and outstanding long-term reliability without the need to replace the sensors in the field. Duct configurations feature a weatherproof Euro style enclosure with a gasketed cover and conformally coated circuit boards for increased moisture resistance in high humidity environments. The sensor is protected by a stainless-steel sintered filter.

SPECIFICATIONS

• 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: 4 - 20 mA (Factory Default)

• 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 Points (20%, 50% & 80%) or 5 Points (20%, 35%, 50%, 65% & 80%)

○ 1% NIST Test Points: 5 Points within selected 20% Range (ie. 30%-50% are 30, 35, 40, 45 & 50)

• Nominal Thermistor Resistive Output @ 77°F (25°C) | (Lead Wire Colors) Non-Linear NTC (Negative Temperature Coefficient): 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: PTFE Colored Leads | Mil Spec 16878/4 Type E