A white square smoke and carbon monoxide alarm with a speaker grille and test/silence and battery/eject buttons.

Gentex S Series SCR Hard Wired Smoke/CO Alarm with Relay

by Gentex

$175.00, see price history

Price is what the vendor listed when last checked. Confirm it with the vendor before buying.

Setup with instructions Hardwired installation and relay hookup go beyond plug-and-play, but clear instructions are enough for a handy family member or an electrician. It needs guided setup rather than a clinical assessment. Testing the connected alert is an important last step.

What it is

Summary

AI-generated from vendor-published content · October 1, 2026

This hardwired alarm senses both smoke and carbon monoxide, and it includes a programmable relay. The relay can switch on connected equipment when the alarm sounds, which is how it can be tied into things like strobe or bed-shaker alerts for someone who may not hear the horn. It uses photoelectric smoke sensing, which is meant to cut down on nuisance alarms. It also has a 9V battery backup, so the relay keeps working if the power goes out. It sounds different patterns for smoke and for CO, and it can link with other Gentex alarms built to work together. It mounts to a standard junction box and needs to be wired into the building's power. The relay only matters if you connect something to it, so plan what that device will be before you buy.

Getting it

Many states lend devices like this for trial periods, free or at low cost — find your state's AT lending program.

Where to get it

Diglo Visit
$175.00

This is the vendor WhatCanHelp tracks for this product — it may also be available from other retailers or a local supplier, and prices vary.

How to fund this

These are common places to ask about paying for equipment like this. Each one decides its own eligibility and what it covers, so start by asking them.

All funding programs, state by state →

Details

Quick Facts Catalog facts · auto-generated
Type
Addresses
Platform
Age range
Complexity
Setup with instructions
Price
$175.00
Funding
  • Medicaid waiver
  • Out of pocket

What setup looks like

  • With a guide
    1. Mount the base to a standard junction box and connect the quick-disconnect wiring harness to the building's power. If you're not comfortable with household wiring, have an electrician do this step.
    2. Install the 9V backup battery, attach the alarm to its base, and remove the dust cover once the work is done.
    3. Press the self-test button to confirm the alarm sounds. If you are adding a strobe or other alert to the relay, wire it and test that it triggers. Plan on about 30-60 minutes.

Sources & fine print

Vendor facts (name, price, platforms, vendor link) sourced from Diglo — view on vendor site (opens in a new tab); last checked October 31, 2026.

Classification & description AI-generated from vendor-published content on October 1, 2026 · confidence: medium. Vendor specs may lag; verify before relying on details in a clinical or funding artifact.

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