• SeeLess Round 1GU Mount with 142×43mm opening and 1/2-inch reveal around heat detector
  • SeeLess Round 1GU Mount with 142×43mm opening and 1/2-inch reveal around heat detector

SMR-1GU-142X43

$247.00 USD
$247.00 USD
Sale Sold out

In stock

This new round flush mount features a 142mm × 43mm opening designed around a heat sensor. It includes a universal adapter ring that replaces the original SeeLess 1-Gang metal box, offering compatibility with both low-voltage applications and traditional wiring setups for a seamless installation.

Need to mount a smaller device?
The SL-BP-R160 Base Plate Adapter is available on request. It pairs with the two-gang and one-gang universal ring to conceal the gypsum opening behind smaller devices, or to adapt the platform for one-gang ring requirements.

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What It Is

Custom universal one-gang round flush-mount platform designed specifically for heat sensor installations. This platform features a 142 mm × 43 mm opening and includes a universal adapter ring that replaces the original SeeLess 1-Gang metal box, allowing the mount to support both low-voltage and traditional wiring setups while maintaining a clean, recessed finish.

Legacy Item – Limited Availability

This is a legacy product with limited availability. Re-orders are made to order and typically ship within 4–10 weeks, depending on selected freight options.

Key Specifications

  • Designed for heat sensor applications
  • Face opening: 6.45" × 2.05" (163.88 mm × 52 mm)
  • Base opening: 6.03" × 2.05" (153.05 mm × 52 mm)
  • Universal adapter ring replaces original SeeLess 1-Gang metal box
  • Drywall compatibility: 1/2", 5/8", 3/4"
  • Made from sustainable gypsum

What’s Included

  • Universal 1-Gang adapter ring
  • Adjustable mounting brackets

What’s Not Included

  • Heat sensor device
  • Plastic or metal back boxes

Important Notice

While SeeLess Solutions has conducted independent third-party testing of our gypsum smoke and sensor mounts, we cannot guarantee code compliance or performance of third-party devices installed in our platforms. Always confirm installation requirements with your local building inspector, particularly regarding NFPA or UL clearance requirements.

Click here for third-party test documentation.

U.S. and Int’l Patents: https://seeless.com/patents

Specification

Details

Model

SMR-1GU-142X43

Mount Type

Custom Universal One-Gang Heat Sensor

Face Opening

Ø5.99in [152.16mm]

Base Opening

Ø5.48in [139.23mm]

Depth

1.7in [43.18mm]

Drywall Compatibility

1/2", 5/8", 3/4"

Electrical Support

Low-Voltage & Line-Voltage

Material

Sustainable gypsum

Finish

Paintable plaster

Adapter Ring

Included

Device Included

No

Box Included

No

Patents

http://www.seeless.com/patents

  • Flush, Trim-Free Integration – No visible trim or flange after finishing
  • Universal Installation Flexibility – Supports both low-voltage and line-voltage applications
  • Adapter Ring Included – Replaces the original SeeLess 1-Gang metal box
  • Flexible Mounting Options – Works without a box for low-voltage or with adapter ring for standard 4S back boxes
  • Broad Installation Adaptability – Supports Carlon low-voltage mud rings and Carlon Old Work plastic boxes
  • Clean Recessed Appearance – Seamless integration within drywall surfaces
  • Sustainable Material – Manufactured from eco-friendly gypsum
  • Adjustable Brackets – Fits 1/2", 5/8", and 3/4" drywall thicknesses

View/Download Specification Data

Installation Guide - Universal Smoke Installation Instructions

Documentation

  • Dimensional Data PDF
  • 1-Gang Universal Ring Specifications

Video Tutorials

  • Installation Training Video

Testing & Compliance

  • Third-Party Test Documentation (heat/smoke/sensor mounts)

Additional Resources

  • Discover SeeLess Smoke & Sensor Mounts
  • SeeLess Comparison Guide – Download and compare models

Support

Questions or bulk orders over $2,500 may qualify for custom shipping quotes.

Contact: sales@seeless.com

Installation Methods

  • Low-Voltage Applications – Install without a box
  • Standard Wiring Applications – Use included adapter ring with standard 4S back boxes
  • Compatible with Carlon orange low-voltage mud rings
  • Compatible with Carlon Old Work blue plastic boxes
  • Adjustable brackets support 1/2", 5/8", and 3/4" drywall

Designed For Use With

  • Heat sensor devices
  • Smoke and sensor installations requiring recessed mounting
  • Residential and commercial drywall applications

Standard Shipping: Ships within 1-2 business days via standard ground.

Bulk Orders: Orders over $2,500 require a custom shipping quote. Contact logistics@seeless.com for pricing.

Returns: View our complete return policy

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Questions?

Email sales@seeless.com with your inquiry and a SeeLess representative will respond within 1-2 business days.