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Weschler Instruments is a manufacturer and distributor of electrical and electronic measurement equipment. Customers worldwide use our products in power plants, steel mills, chemical plants, paper mills and other industrial applications that require rugged, reliable and accurate instrumentation.
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High Voltage Testers

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Non-Contact AC Voltage Detector

Non-Contact AC Voltage Detector - Amprobe

  • Visual & Audible Indication
  • Measure to 122kV
  • Self-test Verification
  • Drop Proof to 6 ft
  • CE Approved


Analog Phasing Voltmeters - Bierer Meters


Bierer analog voltmeters are used for voltage sensing and phasing on overhead and underground systems to 35kV.

  •  For Overhead and URD applications
  • Phase Capacitive Test Points
  • Shielded to minimize stray field indications
  • Impact and water resistant


Analog Voltage Detectors - Bierer Meters


The VDAO40C tests capacitive test points and direct contact voltages to 40kV line to ground (0-69kV phase to phase). The VDAO40P detects 0-40kV line to ground using proximity or direct contact. It also tests capacitive test points & secondary voltage on bare or insulated cables.
Both VDAO40 models have a 5-position selector switch which is calibrated for height above ground to compensate for capacitive coupling effects. These detectors include overload protection to 500kV.
The VDAO300 reads 2.4-300kV line to ground (4-500kV phase to phase). The VDAO450 reads 2.4-450kV line to ground (4-765kV phase to phase). Both meters use a single range Linear/Log ...


Digital Phasing Voltmeters - Bierer Meters


These conventional type phasing voltmeters are rated for overhead and URD systems to 50kV phase to phase.

• Use on primary or secondary voltages or capacitive test points
• Large (3/4") LCD digital meter with backlight
• Shielded housing and interconnect cables
• Impact and water resistant probes


Digital Voltage Detectors - Bierer Meters


The VD1000 Digital Voltage Detector is designed to easily indicate AC voltage on underground primary, overhead primary and transmission conductors up to 999 kV.

  •  Large 3 digit LED display
  •  Backlit continuous for nighttime use
  •  LED segment and battery test
  •  Standard 9 Volt battery
  •  Water tight construction with sunshield
  •  Rated for indoor and outdoor use
  •  Shotgun & Hot Stick compatible
  • (Universal Grip All accessory)


Voltage Indicators - Bierer Meters


VBI-15 Voltage Break Indicator is activated when voltage level drops below 2.5kV line to ground. It is overload protected to 115kV.
AV40 indicates on direct contact to capacitive test points or 120-600V secondaries. It also does non-contact sensing on 7.2/14.4/20 kV URD and 2.4/7.2/ 14.4/20/40 kV OH. A 12- position rotary switch selects function & range.
VIAV300 is a proximity & direct contact voltage indicator with 240V & 2.5/7.5/15/30/ 40/70/140/300 kV ranges selected by a 12-position rotary switch.

  • Super bright LEDs & ultra loud horn
  •  Detects line to ground voltage
  •  Activation threshold meets ASTM ...


Wireless Digital Phasing Testers - Bierer Meters


The PD800W Cordless Phasing Tester accurately and easily operates in multiple applications including phasing, voltage detection, phase sequencing and phase angle indication.

  •  Large easy-to-read digital display with backlight
  •  High intensity color coded LED phase indicators
  •  Requires no interconnecting cable
  •  Operating range of 100ft
  •  Direct contact phasing from 120V - 69kV
  • Non-contact phasing from 69kV - 800kV
  •  Shows phase angle relationship in degrees
  •  Direct contact voltage from 4kV - 69kV
  •  Automatically alerts for Delta/Wye transformation