MT87 digital AC clamp meter — 400A AC current, 600V AC/DC, resistance, diode, continuity
The MT87 is a compact digital AC clamp meter built on large-scale integration (LSI) technology, offering a practical all-in-one measurement tool for electricians, engineers, and electronics hobbyists. It measures AC current non-invasively via its jaw clamp — no need to break the circuit — along with AC and DC voltage, resistance, diode forward voltage, and audible continuity testing in a single handheld instrument.
With a 1999-count display, auto polarity detection, and a 2–3 samples/second sampling rate, the MT87 delivers reliable readings for everyday electrical troubleshooting, panel testing, and field maintenance tasks.
Key Specifications:
- Display: 1999 count, auto polarity
- Sampling rate: 2–3 times per second
- AC current (ACA): 20A / 200A / 400A
- AC voltage (ACV): 600V
- DC voltage (DCV): 600V
- Resistance: 200kΩ
- Diode test: yes
- Continuity test: yes (audible buzzer)
- Clamp jaw opening: 19mm
- Clamp inner diameter: 25mm
- Operating temperature: 0°C – 40°C (32°F – 104°F)
- Dimensions: 150 × 63 × 28mm (5.9 × 2.5 × 1.1 in)
Key Features:
- Non-contact AC current measurement — clamp jaw measures up to 400A without breaking the circuit
- AC and DC voltage up to 600V — covers mains voltage and battery/DC supply testing
- Resistance measurement up to 200kΩ — suitable for component and wiring checks
- Diode test — measures forward voltage drop for diode verification
- Audible continuity buzzer — instant feedback for wiring and PCB continuity checks
- Auto polarity display — automatically shows positive or negative polarity for DC measurements
- Compact and lightweight — easy to carry for field and panel work
Applications:
- AC mains current measurement in panels and distribution boards
- Electrical installation and maintenance testing
- Motor and appliance current draw measurement
- Voltage and resistance checks in industrial and domestic wiring
- Electronics lab and workshop general-purpose measurement
Note: The MT87 measures AC current only via the clamp jaw — DC current measurement requires test leads and is not supported by the clamp function. Ensure the jaw fully closes around a single conductor for accurate current readings. Do not exceed rated input limits.