KAIWEETS HT100S Non-Contact Voltage Tester
A capable budget tester for homeowners; always confirm a dead circuit with a contact meter.
The short version
- Homeowners replacing outlets, switches or light fixtures
- DIYers who want to trace low voltage wiring like doorbells
- Anyone who wants a backup tester in a tool bag
- You are a working electrician who needs a long proven trade tool
- You need actual voltage readings, which call for a multimeter
- You work on DC circuits, since it detects AC only
What owners like
- Low price for a dual range tester with a display
- Percentage readout is easier to read than a plain beep or light
- Flashlight helps in dark boxes and panels
- Clear instructions and simple operation
Common complaints
- Occasional false positives when the detected field is weak
- Shows signal strength only, so it cannot replace a multimeter for actual readings
- Less proven for daily professional use than Fluke or Klein testers
Based on The KAIWEETS product page, the Amazon listing, a KikiTop review of the closely related HT100, and Bob Vila's voltage tester guide for general non-contact tester practice. Independent coverage of this exact model is thin..
Research scores
Scored from the maker's specs and what owners report. Drew's own notes and photos will refine these.
Ownership
Drew's hands-on notes for this product are on the way. Long-term updates will be added to this timeline.
What it does
A pen style non-contact AC voltage tester with two sensitivity ranges, an LCD that shows signal strength as a percentage, a buzzer, and a flashlight.
- Two ranges, so the sensitive range can pick up low voltage wiring and the less sensitive range helps pinpoint the live conductor
- Signal percentage and bar graph show how strong the detected field is
- Screen turns red with a warning symbol above about 90V
- Sound and light alarms plus a built in LED flashlight
- Live and null wire identification and a breakpoint mode for tracing a break in a wire
- Pocket clip and pen sized body
A good low cost tester for homeowners who want to check outlets, switches and wires before working on them, and the percentage readout gives more to go on than a single flashing light. The trade-off is the usual one for non-contact testers: weak field readings can give false positives, and electricians who test all day often pay more for a Fluke or Klein with a longer track record.
How it compares
Specs
- Model
- HT100S
- Detection ranges
- 12 to 1000V AC (high sensitivity) and 70 to 1000V AC (low sensitivity)
- Frequency
- 50/60 Hz
- Safety rating
- CAT III 1000V, CAT IV 600V, double insulated
- Display
- LCD with percentage value and bar graph
- Battery
- 2 AAA, with low battery indicator
- Auto power off
- After 5 minutes without use or signal
- Warranty
- 3 years, per KAIWEETS
Worth knowing
- KAIWEETS rates the tester CAT III 1000V and CAT IV 600V; do not use it beyond those ratings.
- It detects AC voltage only, 12 to 1000V depending on range.
- The red screen and warning symbol above about 90V signal a hazardous voltage.
Questions
Is the KAIWEETS HT100S accurate?
It detects the presence of AC voltage and shows signal strength, not an exact voltage. Reviews note occasional false positives with weak fields, so confirm with a contact meter before touching wires.
What is the difference between the 12V and 70V modes?
The 12V mode is more sensitive and suits low voltage wiring. The 70V mode is less sensitive and helps pinpoint the live conductor among household wiring.
What batteries does it use?
Two AAA batteries. KAIWEETS says the low battery indicator appears below 2.5V.
Can a non-contact tester prove a circuit is dead?
Not on its own. Bob Vila's guide recommends a live, dead, live check: test on a known live source, test the circuit, then test the live source again.
Sources
- KAIWEETS HT100S Non-Contact Voltage Tester (maker page)
- Amazon.com: KAIWEETS Voltage Tester with Signal Percentage, Dual Range AC 12V/70V-1000V
- KikiTop: KAIWEETS HT100 Non Contact Voltage Tester Review
- Bob Vila: The Best Voltage Testers
Researched 2026-10-02. We bought this product; our page is built from the maker's details and what owners report across reviews and forums. We never copy Amazon customer reviews.