


Dwyer Instruments TR-7-UB | Ground Continuity Control with 36" cable | Battery type contactor, 220V
TR-7-UB Dwyer The temperature range of Safe-T-Ground, an explosion-proof hazardous site device, is -13 to 104°F (-25 to 40°C). It uses 1.75 watts without lights and 7.75 watts with them while operating at 105–125 VAC, 60 Hz power. Its enclosure has a DPDT electrical rating of 10 amps at 125 VAC 60 Hz and is constructed of 356-T6 cast aluminum alloy. Measuring 6-5/8" W x 10-3/8" H x 5-5/8" D, it features a 3/4" NPT conduit connection, 7/16" mounting lugs, and a terminal strip for wiring. Two grounding studs that are provided help with grounding. Completing the package is a retractable 16-2 type SO coiled cable that extends up to 16' and a molded polyethylene contactor with berylium copper contact clips.

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- Specifications
- Features
- Downloads
Component | Ground Control |
Connection | Conduit: 3/4" NPT |
Current Rating | DPDT, 10 amps, 125 VAC, 60 Hz contact rating |
Housing | 356-T6 cast aluminum alloy (copper free), explosion-proof - Class I, Group D |
Installation | 7/16" mounting lugs, integrally cast |
Manufacturer | Dwyer Instruments |
Power | 105-125 VAC 60 Hz 7.75 watts - with light, 1.75 watts - without lights. Optional 220-240 VAC, 50/60 Hz |
Size | 6-5/8" W x 10-3/8" H x 5-5/8" D |
Supply Voltage AC | Instrument Sensor: 105-125 VAC |
Supply Voltage AC | Instrument Sensor: 220-240 VAC |
Temp Range | Instrument Sensor: -13 - 104°F/-25 - 40°C |
Temperature | Temperature Limits: -13 to 104°F (-25 to 40°C) |
Weight (for shipping) | 20 lb with contactor and cord |
- Housing that is safe against explosions.
- An audible alert and LED status lights.
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