Cambridge Instruments & Engg. Co. Precision test & measurement instruments,
built in India since 1963.

Rugged hand-driven generator type insulation testers in metal and wooden body variants, from 100 V to 10 kV test voltages. The original CIE design — built and calibrated in Howrah since 1963.

Multi-voltage, selectable-range hand-driven insulation testers with built-in continuity range. Available in MR-1 through MR-8 series covering a wide range of voltage and insulation range combinations.

Motorised generator type insulation testers for sustained high-voltage testing up to 10 kV. Motor-cum-hand driven variants offer dual operation modes.

Dual-scale multi-voltage motorised insulation testers. MR-A through MR-E series with inner/outer scale display for multiple test voltage and range combinations.

Economical bakelite and compact metal body hand-driven insulation testers for everyday site and workshop use at 100 V to 1000 V.

Analog and digital earth resistance testers for 3-terminal earth resistance and soil resistivity measurement. Includes hand-driven analog instruments supplied as a complete kit, and digital models with direct numerical readout.

Microcontroller-based digital insulation testers with LCD display, DAR and PI functions, rechargeable battery option, and test voltages from 100 V up to 5000 V.

4-terminal (Kelvin) digital micro-ohm meter for precise low-resistance and contact-resistance measurement. Seven-segment LED display, multiple test-current ranges, and direct readout in micro-ohms.

True-RMS clamp meters up to 1000 A AC/DC for measuring current in live conductors without breaking the circuit. For panels, motor control centres, and distribution systems.

3½-digit digital multimeters for voltage, current, resistance, capacitance, frequency, and temperature measurement. True-RMS and standard variants.

AC high-voltage test sets for cable and equipment insulation testing up to 5 kV. Continuously variable output voltage with analog metering and toggle trip.

Phase sequence indicators for verifying the phase rotation of 3-phase AC supplies. Disc-rotating type and compact ABS moulded variants.

Transformer oil dielectric strength (BDV) testers from 50 kV to 120 kV. Manual and motorised variants with options for digital display and magnetic stirrer.

Single-phase and three-phase relay test sets for commissioning and testing of protection relays. Variable AC/DC current and voltage sources with phase angle control.

Analog and digital storage oscilloscopes from 20 MHz to 150 MHz — dual and 4-channel, with options for component tester and built-in function generator. Supplied by CIE as authorised Vartech dealer.

DDS function generators from 15 MHz to 80 MHz with sine, square, triangle, and arbitrary waveforms. Programmable models with USB interface and PC connectivity.

Handheld and bench-top LCR meters and capacitance meters for measuring inductance, capacitance, and resistance of passive components with precision.

Programmable DC electronic loads for testing batteries, power supplies, DC-DC converters, and chargers. 600 W capacity with constant current, voltage, resistance, and power modes.

Digital sound level meters covering 30–130 dBA with A-weighting, 1/2-inch condenser microphone, Fast/Slow response and Max hold — for workplace noise surveys, HVAC and environmental monitoring.

Digital anemometers measuring air speed (0–45 m/s, 0–140 km/h) and air temperature simultaneously — with wind chill indicator, analog bar graph, Avg/Min/Max hold and Auto Power Off.

mV, mA, temperature and process calibrators — source & measure Thermocouple (T/C), RTD, DC loop current (4–20 mA) and DC voltage. Designed for field calibration of transmitters and process instruments.

Digital lux meters from 0.1 to 200,000 Lux — with 3½ and 4-digit displays, flexible detachable sensor, Lux/FC selection, Auto/Manual ranging and Min/Max hold.

Industrial K-type digital thermometers (-150 °C to +1300 °C) and compact thermo-hygrometers with clock — for process temperature measurement, HVAC, food safety and ambient monitoring.

Linear, SMPS and programmable DC regulated power supplies — 30 V to 200 V, up to 40 A and 2000 W. Single, dual and multi-output models including slim bench supplies, high-power SMPS with PC interface, and auto-ranging programmable supplies.