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CurrentWatch current sensors

Tough-built sensor

CurrentWatch is a complete line of current sensors, switches and ground fault devices. Capable of measuring both AC and DC current, these products are ideal for monitoring power use and providing diagnostics for electrically powered equipment. 

CurrentWatch product selection guide

Special features, such as field-configurable sensing ranges, split-core housings that wrap around existing wires and self-powered models, enable you to find the perfect current-sensing solution for any application.

EVT series VoltageWatch voltage sensors 

Eaton’s VoltageWatch sensor is a high-performance, true RMS sensor for sensing voltage in single and three-phase installations.

Applications

  • Detect below-normal or "brown-out" voltage conditions; protect against possible motor overheating
  • Identify phase-loss conditions by detecting voltage reduction in one or more phases of a three-phase motor
  • Monitor overvoltage conditions associated with regenerative voltage to help in diagnosing/avoiding motor-drive issues
  • Detect voltage conditions that may cause stress in or damage to soft-starter components (SCRs)

Product Features

  • True RMS output – allows for use in situations where power supplied is non-sinusoidal
  • Standard 4–20 mA loop powered output – industry-standard output works easily and reliably with existing controllers
  • Input/output isolation – input and output circuitry is electrically isolated for improved safety
  • Compact DIN rail-mount enclosure – space-saving 35mm wide enclosure mounts quickly for an attractive installation

ECS series CurrentWatch AC current switches 

AC current switches for detecting overcurrent conditions.

Applications

  • Electronic proof of flow – current-operated switches eliminate the need for multiple pipe or duct penetrations and are more reliable than electro-mechanical pressure or flow switches
  • Conveyors – detect jams and overloads
  • Lighting circuits – easier to install and more accurate than photocells
  • Fans, pumps and heating elements – faster response than temperature sensors
  • Critical motors
  • Ancillary equipment

Product features

  • Universal outputs – NO or NC solid-state switch for control circuits up to 240 Vac/Vdc, compatible with most automation systems
  • Self-powered – cuts installation and operating costs
  • Easily adjustable set point – increases application flexibly and speeds start-up 
  • Solid or split-core housing – versions tailored for each type of installation 
  • LED indication – provides quick visual indication of contact status
  • Built-in mounting feet – simple, two-screw panel mounting or can be attached with the optional DIN rail-mounting kit accessory 

ECSC series compact CurrentWatch current switches 

AC/DC current switches for detecting AC current above 0.5 A trip point.

Applications

  • Independent monitoring of essential elements – monitor current flow to lights, heating coils, motors and other vital components within a system
  • Local disconnects – double-check a contactor’s auxiliary contact, which can incorrectly indicate the absence of a load
  • Control panels – indicate the presence or absence of current flow through circuit breakers and other components

Product features

  • Outputs – NO or NC solid-state switch for control circuits up to 120 Vac/Vdc, compatible with most automation systems
  • Self-powered – cuts installation and operating costs
  • Compact size – great for applications with space constrictions
  • High sensitivity – detects 0.5 A without wrapping the conductor around the sensor several times

ECSJ series CurrentWatch AC current switches 

Jumper selectable AC switches with solid-state output.

Applications

  • Electronic proof of flow – current-operated switches eliminate the need for multiple pipe or duct penetrations and are more reliable than electro-mechanical pressure or flow switches
  • Conveyors – detect jams and overloads
  • Lighting circuits – easier to install and more accurate than photocells
  • Fans, pumps and heating elements – faster response than temperature sensors
  • Critical motors
  • Ancillary equipment

Product features

  • Choice of NO or NC solid-state outputs:
    • 1 A at 240 Vac
    • 0.15 A at 30 Vdc
    • 15 A at 120 Vac
    • 3 A at 120 Vac
    • 0.15 A at 30 Vdc, dual contact
  • Self-powered – cuts installation and operating costs
  • Easily adjustable set point – speeds start-up and reduces inventory
  • Solid or split-core housings – choose the appropriate version for your application
  • LED indication – provides quick visual indication of output contact status
  • Built-in mounting feet – provide for a secure installation

ECS7 series CurrentWatch AC current switches 

Self-calibrating AC current switch with solid-state outputs.

Applications

  • Conveyors – use current overload models to detect conveyor jams caused by scenarios such as side-by-sides
  • Electronic proof of flow – more reliable than electro-mechanical pressure or flow switches, with no need for pipe or duct penetrations
  • Pump protection – provides overload (jams) and underload (suction loss) indication

Product features

  • Self-powered and self-calibrating – reduces installation costs
  • Status monitoring, overload and operating window options – choose the operating style that matches your application
  • Universal output – AC or DC compatibility with any automation system

ECSTD series CurrentWatch AC current switches

AC current switches with time delay.

Applications

  • Motor protection – serves as an electronic proof-of-operation; detects current draw changes in motors when they encounter problems such as pumps running dry or pending bearing failure; non-intrusive and less expensive to install than differential pressure flow sensors or thermal switches
  • High inrush or temporary overload current – adjustable start-up/delay timer allows 0–15 second delay to eliminate nuisance trips from high inrush or short overload conditions

Product features

  • Adjustable start-up/delay timer – field adjustable from 0 to 15 seconds to eliminate nuisance alarms due to start-up inrush or temporary overcurrent conditions
  • Choice of NO/NC AC or universal outputs – contact ratings of 1.0 A at 240 Vac or universal outputs of 0.15 A at 240 Vac/Vdc (NO models) and 0.2 A at 135 Vac/Vdc (NC models) for use with most standard motor control systems
  • Improved ease of installation and use – self-powered, split-core models simplify installation, 1.0 A AC rating eliminates need for time delay relay and status LED provides visual indication of set-point trip and contact action

ECSD series CurrentWatch DC current switches 

DC switch with solid-state or mechanical relay output.

Applications

  • Electronic proof of flow – current operated switches eliminate the need for multiple pipe or duct penetrations
  • Welders – instant indication of equipment status
  • Large drive motors – provide monitoring for field loss protection
  • Power supplies – detect and signal overcurrent condition before equipment damage
  • UPS – monitors battery output
  • Ancillary equipment

Product features

  • Choice of mechanical relay or solid-state outputs:
    • SPDT (Form C) relay, 5.0 A at 240 Vac or 30 Vdc
    • Solid-state, NO, 0.15 A at 240 Vac/Vdc
  • Easily adjustable set point – speeds start-up and reduces inventory
  • Compact, one-piece design – easily fits in crowded control panels
  • Input isolation – safer than shunt/relay combinations
  • Adaptive hysteresis – hysteresis is 5% of set point, allowing closer control than fixed-hysteresis switches 
  • Solid core housings

EAC series CurrentWatch AC current sensors

AC current sensor with analogue outputs and power supply options.

Applications

  • Automation equipment – analogue current reading for remote monitoring and software alarms
  • Data loggers – self-powered sensor helps conserve data logger batteries
  • Panel meters – simple connection displays power consumption

Product features

  • Highly accurate – factory matched and calibrated single-piece sensor is more accurate than traditional two-piece, field-installed solutions
  • Average responding – "average responding" algorithm gives an RMS output on pure sine waves, perfect for constant speed (linear) loads
  • Jumper-selectable ranges – the ability to change input ranges reduces inventory and eliminates zero and span
  • Isolation – output is magnetically isolated from the input for safety and elimination of insertion loss (voltage drop)

EACR series CurrentWatch RMS current sensors 

True RMS AC current sensing with 4–20 mA output.

Applications

  • VFD controlled loads – monitoring Vdc output indicates how the motor and attached load are operating
  • SCR controlled loads – accurate measurement of phase angle-fired or burst-fired (time proportioned) SCRs, with faster current measurement than temperature sensors
  • Switching power supplies and electronic ballasts – true RMS sensing is the most accurate way to measure power supply or ballast input power

Product features

  • True RMS output – true RMS technology is accurate on distorted waveforms like VFD or SCR outputs
  • Jumper-selectable ranges – reduces inventory and eliminates zero and span 
  • Isolation – output is magnetically isolated from the input for safety and elimination of insertion loss (voltage drop)

EDC series CurrentWatch DC current sensors

Ground fault sensors with solid-state or mechanical relay outputs.

Applications

  • Personnel protection (typically 5 mA) – detects sensitive ground fault conditions which could cause injury to people and functions as a sensor and alarm trigger when applied as an input to an overall ground fault protection system
  • Equipment protection (typically 10 or 30 mA) – for applications where personnel protection is not the primary concern, higher set point capability helps eliminate nuisance tripping while still providing adequate ground fault detection to protect machine electronics

Product features

  • Broad range of options to meet application needs – NO or NC, solid-state or mechanical relays, normally energised or normally de-energised contacts
  • Set point options maximise ease-of-use and application flexibility – field-selectable 5, 10 or 30 mA set points on the EGF "Tri-set" models make user adjustments fast, sure and convenient
  • Compatible with standard equipment – application on single and three-phase systems, ideal for use with shunt trip breakers and magnetically isolated from monitored circuit and control power

EGF series CurrentWatch ground fault sensors

Ground fault sensors with solid-state or mechanical relay outputs.

Applications

  • Personnel protection (typically 5 mA) – detects sensitive ground fault conditions which could cause injury to people and functions as a sensor and alarm trigger when applied as an input to an overall ground fault protection system
  • Equipment protection (typically 10 or 30 mA) – for applications where personnel protection is not the primary concern, higher set point capability helps eliminate nuisance tripping while still providing adequate ground fault detection to protect machine electronics

Product features

  • Broad range of options to meet application needs – NO or NC, solid-state or mechanical relays, normally energised or normally de-energised contacts
  • Set point options maximise ease-of-use and application flexibility – field-selectable 5, 10 or 30 mA set points on the EGF "Tri-set" models make user adjustments fast, sure and convenient
  • Compatible with standard equipment – application on single and three-phase systems, ideal for use with shunt trip breakers and magnetically isolated from monitored circuit and control power

EGFL series CurrentWatch ground fault sensors

Ground fault sensors with mechanical relays.

Applications

  • Personnel protection (typically 5 mA) – detects sensitive ground fault conditions which could cause injury to people
  • Equipment protection (typically 10 or 30 mA) – for applications where personnel protection is not the primary concern, higher set point capability helps eliminate nuisance tripping
  • Regulatory – meets requirements as stipulated by governmental and industrial regulatory groups for ground fault sensing

Product features

  • Broad range of options to meet application needs – mechanical relays, normally energised or normally de-energised contacts
  • Set point options maximise ease-of-use and application flexibility – field-selectable 5, 10 or 30 mA set points on the EGFL "Tri-set" models make user adjustments fast, sure and convenient
  • Compatible with standard equipment – application on single and three-phase systems, ideal for use with shunt trip breakers and magnetically isolated from monitored circuit and control power

Test the best!

Not sure if Eaton sensor and limit switch solutions are right for you? You can request samples of Eaton sensors FREE OF CHARGE to test them with your machine applications. We make our Eaton experts available to assist with product selection and provide technical guidance so that you can choose the right sensor for your needs.