Proskit MT-4109 RCD/LOOP Tester (Uc: 0 ~ 9.9 V; RL: 0.1 ~ 2000 Ω)

Trip Time: x1 IΔN: 300 ms (delay 500 ms); x5 IΔN: 40 ms (delay 150 ms); Accuracy ±3 ms; Resolution 0.1 ms

Trip Current: (0.2 – 1.1) IΔN; Accuracy ±0.1 IΔN; Resolution 0.05 IΔN

AC Voltage (UL-N, UL-L, UL-E): 0 ~ 440 V; Accuracy ±(3% + 3d); Resolution 1 V

Frequency: DC, 45 ~ 65 Hz; Accuracy ±1 Hz; Resolution 1 Hz

Contact Voltage (Uc): 0 ~ 9.9 V: ±(10% + 2d) (0.01 V); 10.0 V ~ 99.9 V (0.1 V)

Loop Resistance (RL): 0.1 ~ 2000 Ω; Accuracy ±(10% + 5d); Resolution 0.1 / 1 Ω

RL Test Current: 0.5 IΔN; Accuracy ±(10% + 10d); Resolution 0.05 IΔN

Test Current Multiplier: x0.5, x1, x5

Test Current Range (IΔN): 10 mA, 30 mA, 100 mA, 300 mA, 500 mA

Test Phase Angle: 0° or 180°

Power Supply: 8 × AA 1.5 V (LR6) batteries

Dimensions: 188 × 145 × 73 mm

Weight: ~700 g (excluding batteries)

The Pro’sKit MT-4109 is a next-generation RCD/LOOP tester designed with a compact, durable, and user-friendly form factor. It enables engineers, electricians, and inspection professionals to quickly measure critical electrical parameters, including:

Trip Current

Trip Time

Contact Voltage

Loop Resistance

AC Phase Voltage (0 ~ 440V)

Frequency (45 ~ 65Hz)

In addition, the MT-4109 offers a range of advanced features:

Stores up to 1000 sets of data in internal memory

Easy data retrieval via USB 2.0

Supports fast/slow testing and automatic ramp test for leakage current (Auto Ramp mode)

Large LCD display with backlight for low-light environments

Complies with safety standards IEC/EN 61010-1, CAT III 1000V, CAT IV 600V

This device is an ideal solution for testing, maintenance, and monitoring of electrical systems in industrial, commercial, and residential applications.