Johnson Controls HE-67xx Series TRUERH™ Humidity Element with Temperature Sensors
The HE-67xx Series Humidity devices house both a humidity and a temperature sensor in a wall or duct-mount style. The humidity sensor is capable of measuring Relative Humidity (RH) over the entire range of 0 to 100%, and its All-Polymer™ construction provides improved resistance to chemical corrosion. The TRUERH™ product line delivers devices with RH accuracy of either ±2% or ±3% RH. TRUERH™ humidity elements produce voltage output signals proportional to measured humidity for humidity indication.
Temperature sensors are available in thin-film nickel, thin-film platinum, and silicon. The elements are powered with 14 to 30 VDC or 20 to 30 VAC and feature a user-selectable humidity output of 0 to 10 VDC or 0 to 5 VDC.
• TRUERH™ circuitry and calibration techniques for which patent protection is pending
• All-Polymer humidity sensor patented sensing element provides accurate and reliable humidity sensing
• tested and calibrated with equipment certified to be in compliance with National Institute of Standards and Technology (NIST) guidelines
• ±2% RH accurate model includes test and calibration equipment certificate of calibration conformance
• humidity and temperature sensors in one unit eliminates the need for separate sensors and reduces installation costs
• user-selectable output voltage range allows choice of standard voltage outputs for use with systems in service or new systems
• all-plastic material for duct probe improves thermal performance and complies with Underwriters Laboratories Inc.® (UL) flammability ratings for plenum use; complies with Blue Angel (Germany) and TCO'95 (Sweden) environmental regulations
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| RH Accuracy ±2% | Cat # | Type | RH Accuracy ±3% | Descriptions |
| ∎ | HE-67P2-0N0BT | HE-67xx Series Wall Mount Models | Wall mount humidity element with thin-film platinum temperature sensor | |
| ∎ | HE-67S2-0N0BT | HE-67xx Series Wall Mount Models | Wall mount humidity element with silicon temperature sensor | |
| ∎ | HE-67N2-0N0BT | HE-67xx Series Wall Mount Models | Wall mount humidity element with thin-film nickel temperature sensor | |
| HE-67P3-0N0BT | HE-67xx Series Wall Mount Models | ∎ | Wall mount humidity element with thin-film platinum temperature sensor | |
| HE-67S3-0N0BT ¹ | HE-67xx Series Wall Mount Models | ∎ | Wall mount humidity element with silicon temperature sensor | |
| HE-67N3-0N0BT | HE-67xx Series Wall Mount Models | ∎ | Wall mount humidity element with thin-film nickel temperature sensor | |
| ∎ | HE-67P2-0N00P | HE-67xx Series Duct Probe Models | Duct probe humidity element with thin-film platinum temperature sensor | |
| ∎ | HE-67S2-0N00P | HE-67xx Series Duct Probe Models | Duct probe humidity element with silicon temperature sensor | |
| ∎ | HE-67N2-0N00P | HE-67xx Series Duct Probe Models | Duct probe humidity element with thin-film nickel temperature sensor | |
| HE-67P3-0N00P | HE-67xx Series Duct Probe Models | ∎ | Duct probe humidity element with thin-film platinum temperature sensor | |
| HE-67S3-0N00P¹ | HE-67xx Series Duct Probe Models | ∎ | Duct probe humidity element with silicon temperature sensor | |
| HE-67N3-0N00P | HE-67xx Series Duct Probe Models | ∎ | Duct probe humidity element with thin-film nickel temperature sensor |
| Power Requirements: | 14 to 30 VDC or 20 to 30 VAC at 50/60 Hz, Class 2 | ||
| Current Draw: | 3 mA with no load, 25 mA maximum | ||
| Acceptable Wire Gauge: | 16 to 24 AWG (18 AWG recommended) | ||
| Humidity Element at 77°F (25°C): |
Signal | 0 to 5 VDC or 0 to 10 VD, 1,000 ohm maximum load | |
| Accuracy | HE-67x2: ±2% RH for 20 to 80% RH at 77°F (25°C) ±4% RH for 10 to 20% and 80 to 90% RH at 77°F (25°C) HE-67x3: ±3% RH for 20 to 80% RH at 77°F (25°C) ±5% RH for 10 to 20% and 80 to 90% RH at 77°F (25°C) |
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| Temperature Coefficient | 0.1 to 0.05% RH/°C at 5°C (41°F) to -0.07 to -0.21% RH/°C at 65°C (149°F) |
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| Response Time | Within 5% RH of actual in 15 minutes for 10 to 30%, 30 to 90%, and 40 to 90% RH | ||
| Temperature Sensors: |
Thin-film Nickel | Accuracy: ±0.34°F (0.18°C) at 70°F (21°C) Reference Resistance: 1000 ohms at 70°F (21°C) Resistance Change: Approximately 3 ohms/°F (5 ohms/°C) |
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| Silicon | Accuracy: ±1°F (0.6°C) at 70°F (21°C) Reference Resistance: 1035 ohms at 77°F (25°C) Resistance Change: Approximately 4 ohms/°F (8 ohms/°C) |
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| Thin-film Platinum | Accuracy: ±0.65°F at 70°F (±0.36°C at 21°C) Reference Resistance: 1000 ohms at 32°F (0°C) Resistance Change: Approximately 2 ohms/°F (4 ohms/°C) |
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| Electrical Connections: | 3-position and 2-position screw terminal blocks | ||
| Ambient Operating Conditions: | 32 to 140°F (0 to 60°C) 0 to 100% RH, 85°F (29.4°C) maximum dew point | ||
| Survival Operating Conditions: | -20 to 140°F (-29 to 60°C) 0 to 100% RH, 85°F (29.4°C) maximum dew point | ||
| Ambient Storage Conditions: | -40 to 140°F (-40 to 60°C) 0 to 100% RH, 85°F (29.4°C) maximum dew point | ||
| Materials: | Wall Mount | Beige plastic cover with metal base and metal foil face plates | |
| Duct Probe | White plastic cover with dark gray plastic housing and probe | ||
| Dimensions: | Wall Mount (H x W x D) | 1.81 x 2.12 x 3.12 in. (46 x 54 x 79 mm) | |
| Duct Probe (H x W x D) | 3.28 x 3.25 x 8.27 in. (83 x 83 x 210 mm) Probe (L x D): 6.25 x 0.98 in. (159 x 25 mm) | ||
| Agency Compliance: | Duct Probe Material | 94-5V flammability rated per UL 94 | |
