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Red handheld insulation tester with digital display and probes

TES Electrical Electronic Corp.

TES Electrical Electronic Corp. 1601 Auto Ranging Insulation Tester electrician tool

SKU CH-JH0Q-PE8M4 MPN 1601

Measures insulation resistance with auto-ranging, auto-zero and data-hold functions

  • Labor warranty1 Year
  • Product typeTest Equipment
  • Color and finishRed
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • Auto-ranging selects the correct scale instantly
  • Auto-zero removes residual offset before every test
  • Data-hold freezes the reading for safe recording
  • Insulation resistance measurement protects circuits from leakage faults
  • New condition ensures full factory calibration out of the box

Auto-Ranging Insulation Tester

The TES 1601 is a portable insulation resistance meter designed for electricians and maintenance technicians. It performs auto-ranging measurements to simplify verification of wiring integrity in commercial and industrial installations. The unit includes auto-zero and data-hold functions for efficient on-site testing. It ships new in a single box.

Electricians verifying cable insulation

This tester suits professionals who need a dedicated handheld meter for periodic insulation checks and fault finding. It is not intended for users requiring multi-function installation analysers, loop-impedance measurement or RCD trip-time testing. Buyers needing calibrated certification records should confirm local requirements separately.

Auto-ranging measurement with auto-zero

The defining specification is the auto-ranging insulation measurement combined with automatic zero adjustment and a data-hold button. This combination lets the operator select the correct range instantly, eliminate lead resistance and freeze readings in awkward positions. Confirm the voltage ranges cover your application before purchase.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $207.99
Pricier than about 80% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameTES
Model name1601
Product typeTest Equipment
Color and finishRed
In the box
Number of items1 pack

Questions about this item

What test leads are required to connect the 1601 to a circuit?

The 1601 uses standard insulated test leads with shrouded banana plugs rated for the selected test voltage.

Can the 1601 safely test insulation on legacy wiring without causing damage?

Yes, the auto-ranging function selects an appropriate test voltage, and the high input impedance prevents loading sensitive older conductors.

How do I verify the 1601 is measuring correctly after powering on?

Use the auto-zero feature to null the display with leads open, then apply the built-in check voltage or a known good resistor to confirm the reading matches the expected value.

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