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HONEYWELL HOME Copper Thermowell with Mounting Flange - HVAC Thermowells
HONEYWELL HOMEHVAC Thermowells

HONEYWELL HOME Copper Thermowell with Mounting Flange

The HONEYWELL HOME Immersion Well: Mounting Flange (SKU 121371B, MPN 121371B) is a copper thermowell with a mounting flange type and a 3/4 in external thread size. It features a copper shank and copper connection…

SKU 3G-OTH-68709

Also listed as: 121371 B · 121371-B

Brand
HONEYWELL HOME
Item
Copper Thermowell with Mounting Flange
Category
HVAC Thermowells
Available to Order
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

HONEYWELL HOME
Manufacturer Part Number
121371B
Type
Copper, Copper
Shank Material
Copper
Thermowell Type
Mounting Flange
Connection Material
Copper
External Thread Size
3/4 in
Maximum Insertion/Bulb Length
3 in, 3/8 in

Technical Documents

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HONEYWELL HOME Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The HONEYWELL HOME Immersion Well: Mounting Flange (SKU 121371B, MPN 121371B) is a copper thermowell with a mounting flange type and a 3/4 in external thread size. It features a copper shank and copper connection material, with a maximum insertion/bulb length of 3 in and 3/8 in.

Frequently Asked Questions

What is a Honeywell Home immersion well thermowell used for?

A Honeywell Home immersion well thermowell, like the 121371B, protects temperature sensors in HVAC and industrial process piping. It allows sensor insertion without direct fluid contact, enabling accurate measurement in heating, cooling, and combustion systems while simplifying maintenance.

What are the specifications of the Honeywell Home 121371B thermowell?

The Honeywell Home 121371B is a copper mounting flange thermowell with a 3/4 in external thread size. It has a copper shank and connection, with a maximum insertion/bulb length of 3 in and 3/8 in. It is designed for immersion in HVAC and process applications.

Where to buy a Honeywell Home immersion well thermowell worldwide?

3G Electric supplies the Honeywell Home 121371B immersion well thermowell worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this copper mounting flange thermowell to your facility, regardless of location.

How to install a Honeywell Home mounting flange thermowell?

Install the Honeywell Home 121371B thermowell by threading the 3/4 in external thread into a matching pipe fitting or tank opening. Ensure the copper shank is fully immersed in the process fluid. Use appropriate sealant on threads and insert the sensor to the specified bulb length for accurate readings.

Used in

Common applications for HONEYWELL HOME
Residential HVAC — Honeywell Home TH115-A-120S/U thermostat for 7-day programmable temperature control in homes.
Light commercial buildings — Honeywell Home TL8230A1003 line-voltage thermostat for electric heating systems in offices.
Hydronic heating systems — Honeywell Home L4006E1117 immersion controller for high-limit temperature regulation in boilers.
Indoor air quality monitoring — Honeywell Home C7263A1008 air quality sensor for gas analysis in commercial facilities.
Furnace control — Honeywell Home ST9120U1011 timer controller for circulating fan timing in integrated furnace systems.
HVAC switching — Honeywell Home RA889A1001 switching relay for 24V AC control of zone valves or dampers.

HONEYWELL HOME Products

3G Electric supplies HONEYWELL HOME hvac thermowells. 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
Copper thermowell with mounting flange and 1/2 in external thread. Designed to protect temperature sensors in HVAC systems, installed in pipes or tanks. Maximum insertion/bulb length of 1-1/2 in or 3 in
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Copper thermowell with mounting flange and 1/2 in external thread. Designed to protect temperature sensors in HVAC systems, installed in pipes or tanks. Maximum insertion/bulb length of 1-1/2 in or 3 in
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Dual function immersion controller for hydronic heating systems, combining circulator, high limit, and low limit functions. Temperature range 100°F to 240°F with adjustable differential from 5°F to 30°F. Includes auto/manual switch. Designed for horizontal mounting
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Dual function immersion controller for hydronic heating systems, combining circulator, high limit, and low limit functions. Temperature range 100°F to 240°F with adjustable differential from 5°F to 30°F. Includes auto/manual switch. Designed for horizontal mounting
Triple function immersion controller for high-limit applications in hydronic heating systems. Features vertical mounting, adjustable low-limit differential from 10°F to 25°F, and includes auto/manual switch. Operates within 130°F to 240°F range at low voltage
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Triple function immersion controller for high-limit applications in hydronic heating systems. Features vertical mounting, adjustable low-limit differential from 10°F to 25°F, and includes auto/manual switch. Operates within 130°F to 240°F range at low voltage
Triple-function immersion controller for high-limit applications in hydronic heating systems. Features 130°F minimum and 240°F maximum temperature range, adjustable low-limit differential from 10°F to 25°F, horizontal mounting, 5 switches, and includes auto/manual switch. Supports line volt/low volt switching
HONEYWELL HOME
Triple-function immersion controller for high-limit applications in hydronic heating systems. Features 130°F minimum and 240°F maximum temperature range, adjustable low-limit differential from 10°F to 25°F, horizontal mounting, 5 switches, and includes auto/manual switch. Supports line volt/low volt switching
Single-function immersion controller for circulator applications in hydronic heating systems. Adjustable differential temperature from 5°F to 30°F. Temperature range 100°F minimum to 240°F maximum. Includes auto/manual switch. Horizontal mounting orientation
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Single-function immersion controller for circulator applications in hydronic heating systems. Adjustable differential temperature from 5°F to 30°F. Temperature range 100°F minimum to 240°F maximum. Includes auto/manual switch. Horizontal mounting orientation

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This mounting flange thermowell features a copper shank and copper connection material. It has a 3/4 in external thread size and supports a maximum insertion/bulb length of 3 in and 3/8 in. Used in HVAC systems to protect temperature sensors in pipes or tanks, it allows accurate measurement while shielding the sensor from pressure, corrosion, and flow
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This mounting flange thermowell features a copper shank and copper connection material. It has a 3/4 in external thread size and supports a maximum insertion/bulb length of 3 in and 3/8 in. Used in HVAC systems to protect temperature sensors in pipes or tanks, it allows accurate measurement while shielding the sensor from pressure, corrosion, and flow
This copper thermowell features a mounting flange design for installation in HVAC systems. It accommodates temperature sensors or bulbs with a maximum insertion length of 3 in and a bulb diameter of 3/8 in. The 1/2 in external thread and copper construction provide corrosion resistance in pipe or tank applications
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This copper thermowell features a mounting flange design for installation in HVAC systems. It accommodates temperature sensors or bulbs with a maximum insertion length of 3 in and a bulb diameter of 3/8 in. The 1/2 in external thread and copper construction provide corrosion resistance in pipe or tank applications