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  • Email: info@cem-instruments.in
  • Phone: +91-33-22151376 / 22159759

Electrical Tester


Electrical Tester

DT-9121

Rugged High Quality Electrical Testers to provide fast, accurate, safe test results

All electricians need a two-pole tester. Experienced professionals know that they can—and should–trust their job, their reputation and even their personal safety to these electrical testers.. Built with state-of-the art measurement and safety technology, these testers offer everything you expect from us, and a little bit more.

  • Rugged, high-quality construction is built to last. This includes a heavy-duty molded case, a thick cord, sturdy battery case, and well fitting and durable probe attachment.
  • Fast test results, with large, easy-to-use buttons, bright backlights, and clear audible and physical indicators designed for any work situation.
  • Ergonomic design feels good in your hand, is easy to use (even with gloves on) and quick, secure probe docking.
  • Compliant with IEC EN 61326, EN: 61010-1, EN: 61243, CAT III 1000V, IP-67 Protection
  • Test compliant with TUV and GS
  • Auto detection of AC/DC Voltage
  • Polarity Detection
  • Single Pole Phase Test
  • Rotary Field Indication (Phase rotation)
  • Built-in Flash light to access dark areas
  • Self Test Function
  • Voltage Range: 12, 24, 36, 50, 120, 230, 400, 690 V AC/DC
  • AC Frequency Range for Measuring voltage: 0 – 60Hz
  • Low Input Impedance
LED Voltage Range  12 , 24, 36, 50, 120, 230, 400, 690VDC
12 , 24, 36, 50, 120, 230, 400, 690VAC
LED Resolution ±12 , 24, 36, 50, 120, 230, 400, 690VDC
12 , 24, 36, 50, 120, 230, 400, 690VAC
Tolerances -30 % to 0% of reading
Voltage detection automatic
Polarity detection full range
Range detection automatic
Response time <  0.1s LED
ACV Frequency range 50 /60Hz
Automatic load (RCD) yes 
Internal basic load approx. 2.1 W at 600V
Peak current 1 s <0.2A / Is (5s) < 3.5mA
Operation time ED =30s
Recovery time 10  min
LED on About 8V AC/DC
Single-pole Phase Test  
Voltage range 100…690 V AC
ACV Frequency range 50 /60Hz
Continuity Test  
Resistance range <300kΩ
Test current 5 μA
Overvoltage protection 690 VAC/DC
Rotary Field Indication  
Voltage range (LEDs) 100…400 V
Frequency range 50 /60Hz
Measurement principle double-pole and contact electrode
Self-check Test Autotest
Power supply 2 x1.5V  “AAA” Batteries
Power consumption max.30mA / approx. 250mW
Temperature range -10 °C up to + 55°C
Humidity max.85% relative humidity
Overvoltage class CATIII - 1000V
  • Batteries
  • Instruction Manual
  • Test Certificate