Hoyt Electrical Instrument

Hoyt Electrical Instrument

Hoyt Electrical Instrument Works is a US-based manufacturer of electrical test and measurement equipment focused on insulation resistance testing, low-resistance measurement, and high-voltage detection. The company produces a range of portable handheld testers used primarily by electrical maintenance professionals, power utilities, and industrial facilities for safety verification and preventive maintenance of electrical systems and equipment.

Hoyt's product range includes high-voltage insulation testers (megohmmeters) capable of generating test voltages up to 50 kV, low-resistance milliohm and micro-ohm meters for contact and winding resistance measurement, and non-contact high-voltage detectors for safe identification of energized conductors. These instruments are designed for rugged field use in demanding electrical environments.

Key Product Lines

• High-voltage insulation resistance testers and megohmmeters for cable and transformer testing
• Milliohm and micro-ohm meters (DLROs) for low-resistance measurement of contacts and windings
• Non-contact high-voltage detectors for live conductor identification and safety verification
• Insulation resistance meters for general electrical maintenance applications

Industries Served

Hoyt instruments are used in power generation and distribution, electrical utilities, industrial plant maintenance, railway electrification, and high-voltage cable testing. Their high-voltage testers are particularly suited for transformer testing, switchgear maintenance, and cable insulation verification in medium and high-voltage installations.