Bohra Engineering Co.

Jalore, Rajasthan

Portable Frequency Meters are typically designed to measure frequency ranges from 40 Hz to 70 Hz or wider, depending on the model. They feature digital LCD or LED displays with high-resolution readouts and are powered by internal batteries or rechargeable Li-ion cells. Input voltage range generally supports up to 600V AC, with overload protection and signal conditioning circuitry for safe operation in harsh environments. Measurement accuracy is often within ±0.1 Hz, with fast response time and noise filtering capabilities. The instrument includes features such as auto-ranging, data hold, low battery indication, and sometimes logging or USB interface for data export. The rugged housing is designed to withstand field conditions and comply with IEC 61010 safety standards, ensuring electrical and operator protection. These meters are commonly used in power plants, substations, generator testing, inverter output validation, and frequency-sensitive equipment calibration

Measurement Type: Power Factor (cos φ) – lagging to leading
Display Type: Analog dial with needle pointer
Scale Range: 0.5 lag – 1.0 – 0.5 lead (typical)
Phase: Single-phase
Voltage Rating: Commonly 230V (varies by model)
Current Rating: Typically 5A or 1A input through CT (Current Transformer)
Frequency: 50 Hz or 60 Hz
Accuracy Class: Class 1.5 or Class 2.0
Mounting Type: Panel mounting (flush-mounted)
Terminal Type: Screw terminals for wiring
Construction: Durable metal or ABS casing with clear acrylic or glass cover
Usage: Monitoring power factor in single-phase electrical systems in residential, commercial, and light industrial setups

The DC Moving Coil Meter is a high-accuracy analog panel instrument designed to measure direct current (DC) voltage or current with precision and reliability. Featuring a robust moving coil mechanism, it provides a clear, stable, and linear pointer deflection for easy readability. Housed in a durable casing with a glass or acrylic front panel, the meter is suitable for industrial control panels, laboratories, power systems, and educational setups. It operates on the principle of electromagnetic deflection, ensuring consistent performance with low power consumption. Available in multiple ranges and configurations, it’s ideal for applications where accurate analog measurement is essential