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PRO1 IAQ Remote Sensor: Temp, Indoor, Pro 1 IAQ Models T755S, T855S & T955S. - Temperature Sensors
PRO1 IAQTemperature Sensors

PRO1 IAQ Remote Sensor: Temp, Indoor, Pro 1 IAQ Models T755S, T855S & T955S.

The PRO1 IAQ Remote Sensor: Temp (SKU 3G-OTH-70721, MPN R251S) is an indoor temperature sensor designed for surface mounting. It is compatible with PRO1 IAQ Models T755S, T855S, and T955S, and features a hardwired…

SKU 3G-OTH-70721

Brand
PRO1 IAQ
Item
Remote Sensor: Temp, Indoor, Pro 1 IAQ Models T755S, T855S & T955S.
Category
Temperature Sensors
Available to Order
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Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

PRO1 IAQ
Manufacturer Part Number
R251S
Type
Indoor, Pro 1 IAQ Models T755S, T855S & T955S., Surface Mount
Includes
Mounting Hardware
Application
Temperature
Mounting Type
Surface Mount
Indoor/Outdoor
Indoor
Temperature Range
32° to 99°F
Electrical Connection Type
Hardwired
Compatible Brand and Series
Pro 1 IAQ Models T755S, T855S & T955S.

Technical Documents

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PRO1 IAQ Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The PRO1 IAQ Remote Sensor: Temp (SKU 3G-OTH-70721, MPN R251S) is an indoor temperature sensor designed for surface mounting. It is compatible with PRO1 IAQ Models T755S, T855S, and T955S, and features a hardwired electrical connection with a temperature range of 32° to 99°F. The sensor includes mounting hardware for installation.

Frequently Asked Questions

What is the PRO1 IAQ R251S remote sensor used for?

The PRO1 IAQ R251S remote sensor is used for indoor temperature monitoring in HVAC systems. It is compatible with PRO1 IAQ Models T755S, T855S, and T955S, and provides accurate temperature readings from 32° to 99°F for precise climate control.

What are the specifications of the PRO1 IAQ R251S temperature sensor?

The PRO1 IAQ R251S is a surface-mount indoor temperature sensor with a hardwired electrical connection. It has a temperature range of 32° to 99°F and includes mounting hardware. It is compatible with PRO1 IAQ Models T755S, T855S, and T955S.

Where to buy the PRO1 IAQ R251S remote sensor worldwide?

3G Electric supplies the PRO1 IAQ R251S remote sensor worldwide. As a global industrial solutions provider, we handle logistics, customs, and delivery to your location. Contact us to source this temperature sensor for your HVAC application.

How to install the PRO1 IAQ R251S surface-mount temperature sensor?

Install the PRO1 IAQ R251S by surface-mounting it on a wall using the included hardware. Connect the hardwired electrical terminals to your PRO1 IAQ T755S, T855S, or T955S system. Ensure the sensor is placed away from direct heat sources for accurate 32° to 99°F readings.

Used in

Common applications for PRO1 IAQ
Commercial HVAC maintenance — PRO1 IAQ T855SH thermostat for multi-stage heat pump control in office buildings
Facility energy management — PRO1 IAQ T805 programmable thermostat for 7-day scheduling in retail spaces
Light commercial retrofit — PRO1 IAQ T501M analog thermostat for simple heat/cool control in small shops
Indoor air quality monitoring — PRO1 IAQ R751WO wireless sensor for temperature and motion detection in conference rooms
Heat pump system replacement — PRO1 IAQ T625-2 thermostat for 2H/1C heat pump staging in residential units
Thermostat guard replacement — PRO1 IAQ T150K replacement keys for securing T150 plastic guards in public areas

PRO1 IAQ Products

3G Electric supplies PRO1 IAQ temperature sensors. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
JOHNSON CONTROLS Temperature Sensor: Temp, Indoor, T600 Series/TEC2100 Series, Surface Mount (MPN SEN-600-1)
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HONEYWELL Remote Sensor: Temp, Indoor, Honeywell, Junction Box, Hardwired, 45° to 99°F (MPN TR21/U)
Honeywell
HONEYWELL Remote Sensor: Temp, Indoor, Honeywell, Junction Box, Hardwired, 45° to 99°F (MPN TR21/U)
RESIDEO Remote Sensor: Humidity/Motion/Temp, Indoor, Honeywell Home T10 or T10+ Pro Smart, Battery (MPN C7189R3002-2)
RESIDEO
RESIDEO Remote Sensor: Humidity/Motion/Temp, Indoor, Honeywell Home T10 or T10+ Pro Smart, Battery (MPN C7189R3002-2)
Temperature Sensor: T775, 278Y44/278Y45/278Y46/278Y47/2GZN7/2GZN9/2GZP2 (MPN 50021579-001/U)
Honeywell
Temperature Sensor: T775, 278Y44/278Y45/278Y46/278Y47/2GZN7/2GZN9/2GZP2 (MPN 50021579-001/U)
JOHNSON CONTROLS Temperature Sensor: Temp, Indoor, T600 Series/TEC2100 Series, Surface Mount (MPN SEN-600-4)
JOHNSON CONTROLS
JOHNSON CONTROLS Temperature Sensor: Temp, Indoor, T600 Series/TEC2100 Series, Surface Mount (MPN SEN-600-4)
HONEYWELL Remote Sensor: Temp, Indoor, Honeywell, Junction Box, Hardwired, 45° to 99°F (MPN TR21-A/U)
Honeywell
HONEYWELL Remote Sensor: Temp, Indoor, Honeywell, Junction Box, Hardwired, 45° to 99°F (MPN TR21-A/U)

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