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Edison Electronic Tachometer TNC150 Precise red LED light source (laser beam) together with a reflective strip, non-contact measurements can be made safely up to 40cm (15 3/4") from the target. For measuring in rpm and rps. Testing range: 100 to 30000rpm/1.7 to 500rps. 6 digit clear LCD display with optional back light. Data hold function. Auto power 'OFF' & low power indicator. Battery operated: DC1.5V 3x AAA (included). Conforms with EN61326-6: 2006 and EN61326-2-2: 2006. Pack includes: Digital Tachometer. 2x 30cm Reflective Strips. Wrist strap. Hard carry case. DC1.5V x3 AAA batteries (installed). Instruction manual. Picture descriptions: Actual size of LCD Test for regular rotary speed Laser beam accuracy Complete with protective head cover

ปากกาตรวจจับแรงดันไฟฟ้า Non contact voltage detector without the need to disconnect the conductor/ appliance from the mains. Flashing light and audible indication of AC voltages of 100 to 240V, Quick and accurate detection of cable breaks, can be used to detect blown fuses and distinguish between live, neutral wires in single and three phase supplies. Pen style design fits conveniently in shirt pocket. Voltage sensitivity: 100 to 240V AC. Frequency: 50/60Hz. Over voltage category: CAT III 600V. Detection distance: