TENMARS ELECTRONICS TM-194 microwave leakage detector 50MHz-3.5GHz electrician tool

Microwave leakage detector for safety checks

The TENMARS TM-194 measures RF power density from 0.01 to 2.700 mW/cm² across 50 MHz to 3.5 GHz. It targets the 2.45 GHz microwave oven band and broader emissions from welding gear. A 3¾-digit LCD shows readings up to 3999 with 0.001 mW/cm² resolution. Accuracy is ±2 dB at 2.45 GHz ± 50 MHz.

Replaces guesswork and basic single-band testers

This unit adds a wide 50 MHz to 3.5 GHz range alongside the dedicated microwave frequency. Data hold, MAX and MIN capture, zero function and a built-in alarm setting speed up pass-fail decisions. Overload shows OL on the display. Sampling runs at 2.5 times per second. It suits technicians who need both oven leakage checks and general RF survey capability in one handheld device.

Verify power source and environment before use

The meter requires a 9 V battery (NEDA 1604, IEC 6F22 or JIS 006P) which is not included; expect roughly 100 hours of operation. Operating limits are 5 to 40 °C below 80 % RH; storage spans -10 to 60 °C below 70 % RH. The single-axis sensor means orientation affects readings. Dimensions are 130 × 56 × 38 mm and weight is about 170 g. A carrying case and manual are supplied.