Milwaukee 3203-20 Dual Range Voltage Detector 12-1000V

Product Description

The MILWAUKEE 3203-20 is a dual-range non-contact voltage detector with an independently operable LED work light, designed for electricians and trade professionals who need reliable voltage detection across a wide range of systems. It detects low-voltage AC from 12 to 49 volts and high-voltage AC from 50 to 1000 volts, automatically differentiating between the two ranges without manual switching. A yellow indicator signals low voltage; a red indicator signals high voltage. The unit carries an industry-recognized safety rating of CAT IV 1000V and an IP54 rating for water and dust protection. Powered by two AAA batteries with a quarter-turn cap for quick replacement.

This detector suits residential, commercial, and light industrial electrical work. The expanded sensitivity range allows detection in low-voltage systems such as thermostats, doorbells, and irrigation controls that a standard voltage detector would miss. The reinforced tip design holds up to repeated use in demanding field conditions, and the integrated belt clip keeps the tool accessible during service calls. It is appropriate for use by licensed electricians and HVAC technicians performing live-circuit verification before service.

Key Features

• Dual detection ranges: 12-49 volts AC (low) and 50-1000 volts AC (high)
• Automatic range differentiation with color-coded visual indicators: yellow for low voltage, red for high voltage
• Audible and visual voltage alerts for clear confirmation in noisy environments
• Independently operable LED work light for use in low-light areas without activating voltage detection mode
• CAT IV 1000V safety rating for use in high-risk electrical environments
• IP54-rated housing for protection against water and dust ingress
• Reinforced tip and durable belt clip for extended field use

Compatibility

Designed for non-contact voltage detection in standard AC electrical systems ranging from 12 to 1000 volts, including low-voltage control circuits and full-line-voltage branch circuits.

Installation Notes

Non-contact voltage detectors are a test and measurement tool, not a replacement for full lockout/tagout procedures. Always follow NFPA 70E arc flash and electrical safety guidelines before working on energized equipment. Verify detector function on a known live source before each use. Battery replacement requires a quarter-turn of the end cap — no tools needed.