STANLEY STHT0-62685 Voltage Tester Screwdriver, 125-250 V

STANLEY STHT0-62685 Voltage Tester Screwdriver, 125-250 V

The STANLEY STHT0-62685 is a mains tester screwdriver for a working range of 125-250 V, with a 3.5 mm slotted tip and a 105 mm blade. It is used for a quick check of which of two conductors is live, before touching an installation.

How it works

The transparent handle contains a neon lamp and a current-limiting resistor. When the tip touches a live conductor and a finger closes the circuit through the contact at the end of the handle, a minute current flows through the body and the lamp lights. A neutral conductor or an earthed part gives no glow - that is the whole of the information a tester screwdriver provides.

Working range and conditions

The range on the manufacturer's label is 125-250 V, frequency 50-500 Hz, operating temperature -10 °C to +50 °C. The label carries the CE, VDE and GS marks.

The tip

The tip is a 3.5 mm slot - the size that matches the screws on plugs, switches, sockets and terminal blocks. The blade is 105 mm, long enough to reach terminals deep inside a junction box or a consumer unit. The blade is sleeved, leaving only the tip itself exposed.

Limits of use

A tester screwdriver is an indicator, not a measuring instrument. It shows no voltage value and it does not prove the absence of voltage - with a poor contact, while wearing gloves or when standing on an insulated ladder, the lamp may fail to light even though the conductor is live. To prove a circuit dead, use a two-pole tester or a multimeter.

Other numbers for the same article

The manufacturer's label also carries the alternative numbers 0-66-119, 64-985 and BDHT0-64177. They are useful when searching for the article in older Stanley Black & Decker catalogues.

Technical specifications

Questions and Answers