We ship to the Philippines — door-to-door, customs and logistics handled by 3G Electric

3G Electric
RFQ CartGet a QuoteSign inSign up
PRO1 IAQ Line Volt Mechanical Tstat: Heat Only, On-Off, 50° to 90°F, Exposed Dial - Analog Thermostats
PRO1 IAQAnalog Thermostats

PRO1 IAQ Line Volt Mechanical Tstat: Heat Only, On-Off, 50° to 90°F, Exposed Dial

The PRO1 IAQ Line Volt Mechanical Tstat: Heat Only (MPN T501ML4) is an analog thermostat with an exposed dial and a 1H stage. It operates on 120 to 277V AC with a DPST, Open on Rise switch and a temperature control…

SKU 3G-OTH-70129

Brand
PRO1 IAQ
Item
Line Volt Mechanical Tstat: Heat Only, On-Off, 50° to 90°F, Exposed Dial
Category
Analog Thermostats
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

PRO1 IAQ
Manufacturer Part Number
T501ML4
Type
On-Off, 50° to 90°F, Exposed Dial
AC
120 to 277V
Stages
1H
Voltage
120 to 277V AC
Application
Heat Only
Control Type
Exposed Dial
Fan Settings
No Fan Setting
System Settings
On-Off
Switch Type/Action
DPST, Open on Rise
Temperature Control Range
50° to 90°F
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The PRO1 IAQ Line Volt Mechanical Tstat: Heat Only (MPN T501ML4) is an analog thermostat with an exposed dial and a 1H stage. It operates on 120 to 277V AC with a DPST, Open on Rise switch and a temperature control range of 50° to 90°F. This heat-only unit features On-Off system settings and no fan setting.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the PRO1 IAQ T501ML4 thermostat used for?

The PRO1 IAQ T501ML4 is a line-voltage mechanical thermostat designed for heat-only applications. It controls electric heating systems such as baseboard heaters or radiant ceilings, using an exposed dial to set temperature from 50° to 90°F. It is suitable for residential or light commercial spaces requiring simple on-off control.

What are the specifications of the PRO1 IAQ T501ML4?

The PRO1 IAQ T501ML4 is a 1-stage heat-only thermostat with a DPST switch that opens on rise. It operates on 120 to 277V AC and has a temperature control range of 50° to 90°F. The control type is an exposed dial, and it has no fan setting. The manufacturer part number is T501ML4.

Where to buy the PRO1 IAQ T501ML4 worldwide?

You can source the PRO1 IAQ T501ML4 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we provide this thermostat to procurement teams and engineers internationally.

How to install the PRO1 IAQ T501ML4 thermostat?

Install the PRO1 IAQ T501ML4 by first disconnecting power at the breaker. Mount the thermostat to a standard junction box, connect line and load wires to the DPST switch terminals per the wiring diagram, and secure the exposed dial cover. Ensure the temperature control range of 50° to 90°F matches your heating system requirements.

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 analog thermostats. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Similar products

Matched by specification & description
PRO1 IAQ Low Voltage Thermostat: Heat and Cool, Auto, 5-1-1/7 Day, Horizontal, Rectangle, Horizontal (MPN T855SH). Key specifications — Application: Heat and Cool; Stages: 2H/3C Conventional, 5H/3C Heat Pump; Programming Capability: 5-1-1; Shape: Rectangle; Terminal Designations: D; Temperature Control Range: 44° to 90°F; Changeover Type: Automatic; Brand: PRO1 IAQ.
PRO1 IAQ
PRO1 IAQ Low Voltage Thermostat: Heat and Cool, Auto, 5-1-1/7 Day, Horizontal, Rectangle, Horizontal (MPN T855SH). Key specifications — Application: Heat and Cool; Stages: 2H/3C Conventional, 5H/3C Heat Pump; Programming Capability: 5-1-1; Shape: Rectangle; Terminal Designations: D; Temperature Control Range: 44° to 90°F; Changeover Type: Automatic; Brand: PRO1 IAQ.
PRO1 IAQ Low Voltage Thermostat: Heat and Cool, Manual, B/C/G/O/R/W2/W/E/Terminal Designations (MPN T625-2). Key specifications — Application: Heat and Cool; Stages: 1H/1C Conventional, 2H/1C Heat Pump; Programming Capability: 5-1-1; Shape: Rectangle; Terminal Designations: O; Temperature Control Range: 44° to 90°F; Changeover Type: Manual; Brand: PRO1 IAQ.
PRO1 IAQ
PRO1 IAQ Low Voltage Thermostat: Heat and Cool, Manual, B/C/G/O/R/W2/W/E/Terminal Designations (MPN T625-2). Key specifications — Application: Heat and Cool; Stages: 1H/1C Conventional, 2H/1C Heat Pump; Programming Capability: 5-1-1; Shape: Rectangle; Terminal Designations: O; Temperature Control Range: 44° to 90°F; Changeover Type: Manual; Brand: PRO1 IAQ.
PRO1 IAQ Low Voltage Thermostat: Heat or Cool, Manual, B/G/O/RC/RH/W/Terminal Designations, Auto-On (MPN T601-2). Key specifications — Application: Heat or Cool; Key Features: Easy Access Battery Compartment; Temperature Differential: 0.2°F to 2°F; Voltage: 18V AC; Terminal Designations: B; System Settings: Cool-Heat-Off; Temperature Control Range: 44° to 90°F; Changeover Type: Manual.
PRO1 IAQ
PRO1 IAQ Low Voltage Thermostat: Heat or Cool, Manual, B/G/O/RC/RH/W/Terminal Designations, Auto-On (MPN T601-2). Key specifications — Application: Heat or Cool; Key Features: Easy Access Battery Compartment; Temperature Differential: 0.2°F to 2°F; Voltage: 18V AC; Terminal Designations: B; System Settings: Cool-Heat-Off; Temperature Control Range: 44° to 90°F; Changeover Type: Manual.
PRO1 IAQ Low Voltage Non-Programmable Thermostat: Heat and Cool, Manual, Low-High, Heat-Cool-Off (MPN T731). Key specifications — Application: Heat and Cool; Key Features: Easy Wire Color Coded Terminal Blocks; Temperature Differential: +/-4°F; Voltage: 18 to 30V AC; Terminal Designations: O; System Settings: Heat-Cool-Off; Temperature Control Range: 44° to 90°F; Changeover Type: Manual.
PRO1 IAQ
PRO1 IAQ Low Voltage Non-Programmable Thermostat: Heat and Cool, Manual, Low-High, Heat-Cool-Off (MPN T731). Key specifications — Application: Heat and Cool; Key Features: Easy Wire Color Coded Terminal Blocks; Temperature Differential: +/-4°F; Voltage: 18 to 30V AC; Terminal Designations: O; System Settings: Heat-Cool-Off; Temperature Control Range: 44° to 90°F; Changeover Type: Manual.
PRO1 IAQ Low Voltage Thermostat: Heat or Cool, Manual, B/C/G/O/RC/RH/W/Terminal Designations, Square (MPN T701). Key specifications — Application: Heat or Cool; Key Features: Easy Access Battery Compartment; Temperature Differential: 0.2°F to 2°F; Voltage: 18V AC; Terminal Designations: B; System Settings: Cool-Heat-Off; Temperature Control Range: 44° to 90°F; Changeover Type: Manual.
PRO1 IAQ
PRO1 IAQ Low Voltage Thermostat: Heat or Cool, Manual, B/C/G/O/RC/RH/W/Terminal Designations, Square (MPN T701). Key specifications — Application: Heat or Cool; Key Features: Easy Access Battery Compartment; Temperature Differential: 0.2°F to 2°F; Voltage: 18V AC; Terminal Designations: B; System Settings: Cool-Heat-Off; Temperature Control Range: 44° to 90°F; Changeover Type: Manual.
PRO1 IAQ Low Voltage Thermostat: Heat and Cool, Manual, B/C/G/O/RC/RH/W/E/Terminal Designations (MPN T705). Key specifications — Application: Heat and Cool; Stages: 1H/1C Conventional; Programming Capability: 7 Day; Shape: Square; Terminal Designations: Y; Temperature Control Range: 44° to 90°F; Changeover Type: Manual; Brand: PRO1 IAQ.
PRO1 IAQ
PRO1 IAQ Low Voltage Thermostat: Heat and Cool, Manual, B/C/G/O/RC/RH/W/E/Terminal Designations (MPN T705). Key specifications — Application: Heat and Cool; Stages: 1H/1C Conventional; Programming Capability: 7 Day; Shape: Square; Terminal Designations: Y; Temperature Control Range: 44° to 90°F; Changeover Type: Manual; Brand: PRO1 IAQ.

More from PRO1 IAQ

View all PRO1 IAQ parts →
PRO1 IAQ Line Volt Mechanical Tstat: Heat Only, On, 50° to 90°F, Exposed Dial, 120 to 277V AC, 1H (MPN T501ML2). Key specifications — Application: Heat Only; System Settings: On; Switch Type/Action: SPST, Open on Rise; Temperature Control Range: 50° to 90°F; Stages: 1H; Voltage: 120 to 277V AC; Brand: PRO1 IAQ; Control Type: Exposed Dial.
PRO1 IAQ
PRO1 IAQ Line Volt Mechanical Tstat: Heat Only, On, 50° to 90°F, Exposed Dial, 120 to 277V AC, 1H (MPN T501ML2). Key specifications — Application: Heat Only; System Settings: On; Switch Type/Action: SPST, Open on Rise; Temperature Control Range: 50° to 90°F; Stages: 1H; Voltage: 120 to 277V AC; Brand: PRO1 IAQ; Control Type: Exposed Dial.
PRO1 IAQ Low Voltage Thermostat: Heat and Cool, Manual, B/G/O/RC/RH/W/Terminal Designations, Square (MPN T501M). Key specifications — Application: Heat and Cool; Temperature Differential: 1˚F; Voltage: 24V AC; Terminal Designations: Y; System Settings: Cool-Heat-Off; Temperature Control Range: 50° to 90°F; Changeover Type: Manual; Shape: Square.
PRO1 IAQ
PRO1 IAQ Low Voltage Thermostat: Heat and Cool, Manual, B/G/O/RC/RH/W/Terminal Designations, Square (MPN T501M). Key specifications — Application: Heat and Cool; Temperature Differential: 1˚F; Voltage: 24V AC; Terminal Designations: Y; System Settings: Cool-Heat-Off; Temperature Control Range: 50° to 90°F; Changeover Type: Manual; Shape: Square.