THE GEAR GUIDE

Testers & Safety

An outlet tester can reveal common wiring faults; it cannot prove every aspect of an installation is safe. Pair basic checks with suitable protection and the equipment manual.

READ THE LABEL

What to look for

Check for common outlet wiring faults before using a pedestal. A basic tester has important limitations.
Use GFCI protection for shock risk; an outlet tester does not provide GFCI protection.
Select an alarm listed for the environment and follow its operating-temperature limits.
Never use a grill, generator, or fuel-burning heater inside a tent. A CO alarm is not permission to do so.

The shortlist

PUBLISHED SPECS · DIRECT LINKS

3 picks · Specifications first. Prices on Amazon.

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Budget

Klein Tools

RT210 GFCI Outlet Tester

Manufacturer ratings · Not tested by us

Function: Wiring + GFCI test
Voltage: 110–125 V
Test category / standard: CAT II 300 V

ETL listed

A quick check for common receptacle faults. This tester does not itself provide shock protection.

Specifications & limits

Mid

Klein Tools

RT250 LCD Outlet Tester

Manufacturer ratings · Not tested by us

Function: Wiring + GFCI timing
Voltage: 120 V
Power source: 2 × AAA
Test category / standard: CAT II 135 V

ETL listed

Adds a voltage display and GFCI trip timing to common outlet-wiring checks.

Specifications & limits

Budget

First Alert

CO400 Battery CO Alarm

Manufacturer ratings · Not tested by us

Function: Carbon monoxide alarm
Power source: 9 V battery
Test category / standard: UL 2034

Residential alarm: check temperature and application limits. Do not assume approval for RV or outdoor use.

Specifications & limits

Testers & Safety

What to look for

The shortlist

RT210 GFCI Outlet Tester

RT250 LCD Outlet Tester

CO400 Battery CO Alarm

Part of these setups