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

Gentex S Series SCRR Hard Wired Smoke/CO Alarm (2 Relays)

by Gentex

$190.00, see price history

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

Setup with instructions A family member or handyman can mount and wire this with the instructions in about an hour. Because it connects to household wiring, careful following of the guide matters. It sits in guided setup rather than self-serve because of the wiring, and because the relay wiring takes extra care if you link it to other alerting devices.

What it is

Summary

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

This is a hard-wired alarm that senses both smoke and carbon monoxide (CO) and sounds a loud horn when it detects either one. It has two sets of relays, which are switches the alarm can trip so it can trigger other connected equipment. That makes it a useful building block when a standard horn alone won't wake or warn someone. A 9V alkaline battery keeps it running through a power outage, and it will tell you when the battery is low or missing. It can link with other Gentex tandem-capable smoke alarms, so one alarm sets off the others. Smoke and heat get a three-beep pattern and CO gets a four-beep pattern. The relays are programmable, but the page doesn't say what they can be wired to, so check that before ordering. The alarm is wired into the home's power, so plan on an installer or confident DIYer.

Getting it

Try before you buy

Devices like this are often available to borrow through your state's AT Act program — typically free or low-cost — so you can try it before buying or pursuing funding.

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Where to get it

Diglo Visit
$190.00

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Details

Quick Facts Catalog facts · auto-generated
Type
Addresses
Platform
Age range
Complexity
Setup with instructions
Price
$190.00
Funding
  • AT Act lending
  • Medicaid waiver
  • Out of pocket

What setup looks like

  • With a guide
    1. Turn off power at the breaker, then connect the quick-disconnect wiring harness to the household wiring in a standard junction box.
    2. Attach the mounting plate to the junction box, add the 9V battery, and snap the alarm onto the plate. Remove the dust cover only after construction or painting is done.
    3. Restore power and press the self-test button to check the horn. If you connect other alarms or alerting devices to the relays, test them too. Allow about an hour, longer if you add relay connections.

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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