RangerPRO Dual Wire Constant Monitor – CM1600

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Item #: CM1600

  • CAPABILITIES: One device that can monitor your entire workstation: Two wrist straps; Two work surfaces and Two auxiliary grounds
  • SUPERIOR TECHNOLOGY: Uses accurate dual conductor resistance monitoring technology to ensure ESD protection
  • NOTIFICATIONS: Visible and audible alarms indicate improper grounding of the operator and work surface. Relay signal can trigger light towers or sirens.
  • SAFE: Uses an ultra-low voltage signal so it will not irritate the skin.
  • CERTIFIED: Calibration certificate included
  • REDUNDANCY: For use with Dual Wire Wrist Straps which provides two paths-to-ground to ensure protection.
  • OPTIONS: Part of a versatile family of monitors that capabilities is scalable for your application or budget: The RangerONE monitors 1 operator.  RangerTWO monitors 1 operator and 1 workstation.

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Versatile, Dependable, and Accurate Resistance Based Constant Monitor System

The RangerPRO constant monitor is the premiere workstation grounding system available. A continuous pulse of an ultra-low voltage signal measures the electrical resistance of two wristbands, two work surfaces, and two auxiliary grounds simultaneously and alarms if there is a problem.

The RangerPRO is an extremely sensitive and reliable ground monitoring instrument. Audible and visible alarms are triggered if the operator’s resistance exceeds 35 megohm . Low resistance can also triggers an alarm event. Mat alarm limits are set at 100 meg ohm. The CM1600 packaged in a stainless steel case with two wrist strap jacks.

The RangerPRO saves time by eliminating the time-consuming testing of grounding products. The system uses special dual wire wristband sets that contain two independent elements which provide fail-safe protection. The series includes both fabric and metal wristbands paired with cords in either 5, 10, or 20 feet lengths.

Meets or exceeds requirements of ANSI ESD-S20.20 and ESDA Standard 1.1-2006

Operator Presence Check

The RangerPRO can be outfitted with the Cyclops Remote Sensor that detects the presence of an operator and alarms if a wrist strap is not connected to prevent ungrounded handling of ESD susceptible items.  Model:  CM-REMOTE-IR.

Alarm Signals

The RangerPRO works with light towers, sirens, and other devices to enhance the signal of a failure. Pair the unit with the CM-RELAY to integrate with a signal (check with the manufacturer of your signal for compatibility.)


The RangerPRO is factory calibrated and does not require annual re-calibration.  It is recommended to verify calibration with the CM2015PV periodic verification meter at least once a year.  Download the RangerTWO calibration statement for your compliance program.

Additional information

Weight 0.5 lbs
Dimensions 4 × 1 × 3 in

Dual Wire Resistance


Two Wrist Straps, Two Worksurface, Two Aux Grounds


0.2v (200mV)

Power Supply

7-15 VDC, 100mA

Alarm Limits

Wrist Strap: 1.8 megohm (Low Resistance) 35 meg ohm (High Resistance)
Worksurface: 100 meg ohm.

This product is available online from the following resellers:

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