The Klein Tools RT200 is a basic GFCI receptacle tester for standard North American 120V outlets. It detects the six most common wiring faults including open ground, reverse polarity, open hot, open neutral, and hot/ground reversed, and tests GFCI operation via a built-in test button. Large LED light indicators with an on-body key code allow quick fault identification. Certified to UL1436 by UL and CUL. No batteries required. This product has been discontinued; electricians may consider the RT210 or RT250 as active replacements. Backed by Klein Tools' 1-year limited warranty.
Is the RT200 still available?
No — the RT200 has been discontinued. The RT210 is its current equivalent (GFCI-only, no battery, LED). The RT310 adds AFCI testing and a flexible cord if you need more capability.
What did the RT200 test?
Standard GFCI protection on 120/125V three-wire grounded receptacles, with LED indicators showing 6 wiring conditions: open ground, open neutral, open hot, hot/ground reversed, hot/neutral reversed, and correct wiring.
Does the RT200 need batteries?
No — it drew power directly from the outlet under test. No batteries required.
What replaced the RT200?
The RT210 is the direct equivalent: same GFCI-only LED function with no battery required, updated with a CAT II 300V safety rating and 6.6-foot drop protection.
# Klein Tools® RT200 GFCI Receptacle Tester **Model:** `RT200` **Brand:** Klein Tools **Category:** Voltage Tester > The Klein Tools RT200 is a basic GFCI receptacle tester for standard North American 120V outlets. It detects the six most common wiring faults including open ground, reverse polarity, open hot, open neutral, and hot/ground reversed, and tests GFCI operation via a built-in test button. Large LED light indicators with an on-body key code allow quick fault identification. Certified to UL1436 by UL and CUL. No batteries required. This product has been discontinued; electricians may consider the RT210 or RT250 as active replacements. Backed by Klein Tools' 1-year limited warranty. ## Specifications | Attribute | Value | |---|---| | Product Type | GFCI Receptacle Tester | | Voltage Range Ac | 120/125V AC | | Frequency | 50/60 Hz | | Tests Gfci | Yes | | Tests Afci | No | | Outlet Types Tested | 3-wire 120V standard receptacle | | Display Type | LED | | Battery Required | No | | Barcode (UPC) | 092644694035 | | Warranty | 1-year limited | Source: https://www.jaspecs.com/klein-tools/voltage-tester/rt200-klein-tools-gfci-receptacle-tester/