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AMPROBE

Amprobe is a brand of test and measurement instruments with a history dating to the mid-20th century. The product line covers electrical and environmental measurement tools used by electricians, HVAC technicians, facility maintenance staff, and plant engineers. Core categories include digital multimeters, clamp meters, megohmmeters, voltage testers, receptacle and GFCI testers, infrared and contact temperature meters, humidity meters, and battery testers. Many instruments carry CAT III or CAT IV safety ratings for use on distribution and installation circuits, and handheld enclosures are built for field service conditions. 3G Electric supplies Amprobe instruments globally, with logistics support for single-unit orders and volume procurement. The catalog includes non-contact voltage detectors such as the PY-1A, which senses 160 V to 480 V AC with a light indicator and CAT III 600 V rating; the PK-110 kit, which bundles a 1,999-count digital multimeter with a receptacle tester and volt detector; the ST-102B receptacle tester for 110–125 V AC outlets with a 5-15P plug and GFCI test function; and the BAT-250 analog battery tester for 15 V and 9 V batteries. Environmental measurement instruments include the THWD-5, THWD-3, TH-1, and TH-3, which measure ambient temperature, dew point, relative humidity, and wet bulb temperature for HVAC diagnostics, indoor air quality checks, and facility condition monitoring. These instruments are used in electrical troubleshooting, preventive maintenance, HVAC service, and general facility management. 3G Electric supports the Amprobe line with product identification by manufacturer part number, specification confirmation, and order fulfillment for customers worldwide.

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About AMPROBE

Amprobe is a brand of test and measurement instruments with a history dating to the mid-20th century. The product line covers electrical and environmental measurement tools used by electricians, HVAC technicians, facility maintenance staff, and plant engineers. Core categories include digital multimeters, clamp meters, megohmmeters, voltage testers, receptacle and GFCI testers, infrared and contact temperature meters, humidity meters, and battery testers. Many instruments carry CAT III or CAT IV safety ratings for use on distribution and installation circuits, and handheld enclosures are built for field service conditions. 3G Electric supplies Amprobe instruments globally, with logistics support for single-unit orders and volume procurement. The catalog includes non-contact voltage detectors such as the PY-1A, which senses 160 V to 480 V AC with a light indicator and CAT III 600 V rating; the PK-110 kit, which bundles a 1,999-count digital multimeter with a receptacle tester and volt detector; the ST-102B receptacle tester for 110–125 V AC outlets with a 5-15P plug and GFCI test function; and the BAT-250 analog battery tester for 15 V and 9 V batteries. Environmental measurement instruments include the THWD-5, THWD-3, TH-1, and TH-3, which measure ambient temperature, dew point, relative humidity, and wet bulb temperature for HVAC diagnostics, indoor air quality checks, and facility condition monitoring. These instruments are used in electrical troubleshooting, preventive maintenance, HVAC service, and general facility management. 3G Electric supports the Amprobe line with product identification by manufacturer part number, specification confirmation, and order fulfillment for customers worldwide.

Common Applications

  • Electrical maintenance — Amprobe PY-1A non-contact voltage detector for verifying AC voltage presence on distribution circuits up to 480 V.
  • HVAC diagnostics — Amprobe THWD-5 temperature and humidity meter for measuring dew point, wet bulb, and relative humidity in air-handling systems.
  • Facility management — Amprobe TH-3 temperature and humidity meter for spot-checking ambient conditions and indoor air quality.
  • Electrical troubleshooting — Amprobe PK-110 kit with digital multimeter, receptacle tester, and volt detector for branch-circuit and equipment checks.
  • GFCI and receptacle testing — Amprobe ST-102B tester for verifying wiring and GFCI operation on 110–125 V AC outlets.
  • Battery maintenance — Amprobe BAT-250 analog tester for checking 9 V and 15 V batteries used in portable instruments and safety devices.

Frequently asked questions

Common questions about AMPROBE from 3G Electric.

What is the difference between the Amprobe THWD-5 and the TH-1 temperature and humidity meters?

Both the THWD-5 and TH-1 measure ambient temperature, dew point, relative humidity, and wet bulb temperature. The THWD-5 is supplied as a complete onboard instrument, while the TH-1 is a handheld meter that does not include a probe. Selection depends on whether a self-contained unit or a meter requiring a separate probe is preferred for the application. Both are used for HVAC diagnostics, indoor air quality assessment, and environmental monitoring in industrial and commercial facilities.

What safety rating does the Amprobe PY-1A voltage detector carry?

The Amprobe PY-1A non-contact voltage detector is rated CAT III 600 V. It detects AC voltage from 160 V to 480 V and provides a light indicator when voltage is present. The CAT III rating makes it suitable for use on distribution circuits and fixed installation testing where transient overvoltages are a consideration. It has no display and is intended for quick presence/absence verification rather than quantitative measurement.

What components are included in the Amprobe PK-110 kit?

The Amprobe PK-110 kit includes a digital multimeter with 1,999 counts, a receptacle tester, and a volt detector. The multimeter measures AC/DC voltage and resistance. The kit is used for electrical troubleshooting, circuit verification, and general maintenance tasks. Because it combines three instruments in one package, it is often specified for field-service technicians and maintenance departments that need basic electrical test capability in a single carrying case.

What is the Amprobe ST-102B receptacle tester used for?

The Amprobe ST-102B is a receptacle tester for 110–125 V AC outlets with a 5-15P plug. It uses light indicators to verify correct wiring and to test GFCI functionality. It has no display and is not assigned a CAT safety rating. Typical use is checking branch-circuit receptacles and confirming GFCI trip operation in commercial, industrial, and residential electrical maintenance. It is a go/no-go instrument rather than a measuring device.

Which batteries does the Amprobe BAT-250 test?

The Amprobe BAT-250 is an analog display battery tester for 15 V and 9 V batteries. It provides a quick reading of battery charge status. The analog display shows the condition of the battery under test without requiring a separate multimeter. It is used in maintenance and troubleshooting for devices that rely on 9 V or 15 V batteries, such as smoke detectors, test instruments, and small portable equipment.

What environmental parameters do Amprobe THWD-3 and TH-3 meters measure?

The Amprobe THWD-3 measures ambient temperature, dew point, relative humidity, and wet bulb temperature. The TH-3 measures ambient temperature from -4°F to 140°F and relative humidity. Both are used for environmental monitoring in HVAC, industrial maintenance, and facility management to verify comfort conditions or diagnose moisture-related issues. The THWD-3 provides additional dew point and wet bulb calculations, while the TH-3 covers basic temperature and humidity measurement.