Watchdog VIPx Remote Rectifier Monitor by Elecsys

Features Analog Measurement Channels. No Interruption Capabilities.



The Watchdog VIPx is specifically designed for most rectifier monitoring applications. Features include pre-configured, dedicated analog measurement channels for volts, current, and pipe to soil. Unit is equipped with an AC Probe to detect and monitor the rectifier input power. An additional dry contact digital channel can be used for momentary alarm monitoring (door alarm for intrusion detection for example), or for status monitoring (valve position, etc.).

Units come factory configured as Ch 1- volts, Ch 2- amps, Ch 3- pipe to soil potential (required reference cell not included). Dedicated channels that greatly simplify installation at any rectifier location. Compact, NEMA 4x lockable enclosure provides reliable protection from tampering and environmental damage.

Using field-proven Watchdog lightning surge-resistant circuitry, the Watchdog VIPx is the best choice for any standard CP rectifier monitoring application.


  • Specifically designed for basic rectifier monitoring applications
  • Factory configured to monitor Rectifier Voltage, Current, and Pipe to Soil Potential
  • Additional inputs for: 
    -Digital dry contact input (alarm or status monitoring)
    -Rectifier input power monitoring



  • Cost-effective, easy to use, CP rectifier monitoring system.
  • Alarm and return to normal notifications via e-mail and/or SMS text message
  • Lightning/power surge-resistant circuitry
  • Global communication to Pipeline Watchdog web monitor system via cellular or satellite telemetry
  • Intuitive, “point & click” web interface
  • Firmware reprogrammable over the air (cellular units only)
  • LCD display for on-site information
  • Power via external 10-35 VDC or 12-25 VAC
  • Rechargeable NiCd backup battery for alarm notification in the event of a power failure
  • Inputs-3 analog, 1 digital and 1 AC detect digital input (using included AC Probe)


 Part Number  CDMA Cellular telemetry: VIPx-N1
 GSM cellular telemetry: VIPx-N2
 Satellite telemetry: VIPx-S1
 External antenna kit: 48-0003-21
 Size  6.5” (155 mm) X 8.5” (215 mm) X 4” (102 mm)
 Operating Environment   Temperature: -40°C to +85°C (-20o C to +70o C in battery backup power mode)
 Humidity: 0-95% non-condensing
 Enclosure: Lockable NEMA 4X polycarbonate
 Installation   Universal brackets included for mounting inside rectifier cabinet, pole mount or post mount
 Connection cables: 1ea 7’ (2.1m) power cable, 1ea 7’ (2.1m) measurement cable
 Power Options  Power required: 10-35 VDC or 12-25 VAC external power input
 Internal rechargeable NiCd battery pack provides backup power for alarm notification in the event of a power failure
 Input Connections   Channel 1-Rectifier voltage +/- 200 VDC (+/-1%)
 Channel 2-Rectifier current (amps) +/- 100mVDC (+/-1%)
 Channel 3-Pipe to soil potential +/- 10 VDC (>10 MΩ input impedance, +/-1%)
 AC probe-Detects rectifier AC mains input voltage electric field
 Dry-contact digital input for alarm or status reporting (intrusion alarm, valve position, etc.)