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Dwyer HHT-IU | Intrinsically Safe Humidity Transmitter | 4-20 mA, ±2% RH
The Dwyer HHT-IU is an intrinsically safe humidity-only transmitter with a 4-20 mA output for use in hazardous locations. Use it with an intrinsically safe barrier; supply voltage is 9.5 to 28 VDC.
- Aluminium NEMA 4X (IP66) enclosure
- Operates from -40 to 60°C (-40 to 140°F)
- One 4-20 mA output for relative humidity
- FM intrinsically safe Class I Div. 1 Groups A, B, C, D
- Humidity accuracy ±2% between 10 and 90% RH
- Specifications
- Features
- Downloads
| Part Number | HHT-IU |
| Brand | Dwyer |
| Protection | Intrinsically safe |
| Measures | Relative humidity |
| Output | 4-20 mA (humidity) |
| Power | 9.5 to 28 VDC |
| RH Range | 0 to 100% RH |
| Accuracy | ±2% (10 to 90% RH) |
| Sensor | Capacitance polymer |
| Response Time | 15 s |
| Enclosure | Aluminium, NEMA 4X (IP66) |
| Hazardous Area Rating | FM intrinsically safe Class I Div. 1 Groups A, B, C, D; Class II Div. 1 Groups E, F, G; Class III Div. 1 T4 |
| Operating Temperature | -40 to 140°F (-40 to 60°C) |
| Approvals | FM, CE |
- Explosion-proof and fundamentally safe models with FM approval.
- LCD option integrated.
- Two-way output models for relative humidity and temperature.
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