Martindale Electric 50-440V Proving Unit
Professional 50-440V AC proving unit for voltage testers. Features CALCHECK verification, magnetic hanger & long battery life. Essential for electricians.
The Martindale Electric 50-440V Proving Unit is an essential tool for electricians and technicians, designed for safely proving both low and high impedance voltage indicators, test lamps, and two-pole voltage testers. Its robust, low-profile design is fully overmoulded for enhanced durability and protection in demanding work environments.
Featuring a unique stepped voltage output that matches the thresholds of two-pole testers, it ensures accurate and reliable proving. The unit includes the innovative CALCHECK feature, which allows for the verification of insulation and low resistance ranges on installation testers, adding a critical layer of safety and compliance to electrical testing procedures.
For user convenience, it incorporates a long battery life powered by six AA batteries, with a low battery indicator and an auto power-off function to conserve energy. The supplied MG3 high-strength magnetic hanger allows for secure, hands-free placement on metallic surfaces, improving workflow efficiency. Colour-coded outputs provide clear, immediate identification of the voltage level being supplied.
Specifications
- Voltage Measuring Range: 50V to 440V AC
- Display: LED indicator
- Operating Temperature Range: -10°C to 40°C
- Design: Tough, overmoulded low-profile casing
- Special Feature: CALCHECK function for tester verification
- Special Feature: Stepped voltage output matched to tester thresholds
- Power: Long-life with 6x AA batteries (included)
- User Features: Low battery indicator, auto power-off
- Included Accessory: MG3 magnetic hanger
- Dimensions: 33mm W x 43mm H x 15mm D
This proving unit is a core component of the Martindale Electric range, built to deliver professional-grade performance, safety, and reliability for all electrical proving applications.
Need larger quantities? Need additional quantities? Get in touch and we'll arrange it for you.
- Dispatched within 0-2 business days
- Delivery to United States: 3-5 business days*
- Free Shipping Included
Always follow local regulations and product guidance.
Free standard delivery on Canadian mainland orders. Express delivery options and international shipping available at checkout.
We offer a 30-day money-back guarantee on most products. For faulty items, contact us within 14 days for a replacement or refund.
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