RangerTWO Dual Wire Constant Monitor - Model CM1602

  • Monitors one dual wire wrist strap and one ESD work surface for ESD Compliance
  • Uses accurate resistance based monitoring technology
  • Easy to use and economical
  • Uses an ultra-low voltage signal
  • Audible and visual alarm indicators
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Part Number: CM1602
Data Sheet
Owners Manual

RangerTWO Dual Wire Constant Monitor is a dependable and accurate continuous monitor for one operator and one ESD work surface.

The RangerTWO Dual Wire Constant Monitor is an extremely sensitive and reliable ground monitoring instrument. Audible and visible alarms are triggered if the operator’s resistance exceeds 35 megohm (factory default). Low resistance of 1.8 megohm also triggers an alarm event. Mat alarm limits are set at 100 meg ohm.

The RangerTWO saves time by eliminating the time consuming testing of grounding products. The system uses special dual wire wrist band sets that contain two independent elements which provide fail-safe protection. The series can be used with most common dual wire wrist straps available. Transforming Technologies offers both fabric and metal wrist bands paired with cords in either 5, 10, or 20 feet lengths.


CyclopsTM Operator Presence Check
The Cyclops is an infrared sensor that causes the monitor to alarm when an operator approaches the workstation without connecting their wrist strap. The alarm continues until compliance is achieved.  Part number:  CMREMOTE-IR

 Wrist Strap Parking Station
Provides a jack that will allow an operator to disconnect and leave the dual conductor cord at the workstation without the wrist strap monitoring system alarm sounding. For use with mono plug coil cords. Part number: CP3000

Operator Presence Check

The RangerTWO 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


The  RangerTWO 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 RangerONEcalibration statement for your compliance program.

Superior Technology
Resistance based monitoring is the only true wrist strap monitoring technology available. Single wire systems simply detect that a person is wearing a wrist strap and put the monitor into an unalarmed state. Resistance monitors actually measure the resistance of the wrist strap in combination with the person and alarm if the product exceeds preset levels. This accurate measurement ensures reliability.