CM400 ESD Single Wire Constant Monitor
CM400 ESD Single Wire Constant Monitor

CM400 – Single Wire Continuous Monitor, One Operator Only

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Item #: CM400

  • Continuously Checks One Single Wire Wrist Strap
  • Easy To Use: Simply Plug In Wrist Strap
  • Audible and Visual Alarms
  • It is a Fixed Resistor System and there is no Calibration Needed.
    • 0 $


A single wire constant monitor for one wrist strap only.

The CM400 single wire constant monitor continuously checks the total grounding system, including the operator, the wristband and the coil cord, and alarms if there is any issues. The monitor is compatible with most single wire wrist straps and coil cord sets. This is the simplest, and most cost-effective way to ensure a wrist strap is continually working. An audible alarm and light will signal a failure.

Why Use Constant Monitors

Since people are one of the greatest sources of static electricity and ESD, proper grounding is paramount. One of the most common ways to ground people is with a wrist strap. Ensuring that wrist straps are functional and are connected to people and ground is a continuous task. Using a constant monitor eliminates the need to test wrist straps and coil cords before, during and after shifts.  They are constantly monitoring the grounding system, and will alarm if there are problems.  This eliminates failures that happen after a wrist strap passes a test but fails during the work shift.

The CM400 constant monitors are factory calibrated and will never need recalibration. It is a fixed resistor system and is go no go, there is no calibration needed. You can verify proper working conditions with the CM410PV  periodic verification.

Additional information

Weight 1 lbs
Dimensions 1.25 × 0.88 × 1.75 in

Single Wire/ Capacitance


Monitors 1 Wrist Strap


120V AC

This product is available online from the following resellers:

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