Bosch PRO GFM1000-15 Open Fork Meter complete kit displaying all original included components. The true RMS electrical multi tester tool sits vertically next to its premium flexible red and black silicone test leads, two standard AA batteries for power flexibility, and a heavy duty zippered black fabric carrying pouch featuring the red Bosch logo.
A close up front angled view of the standalone Bosch PRO GFM1000-15 Professional True RMS Open Fork Meter electrical tester. The design shows the open jaw testing fork, blue and black rubber reinforced housing, large red rotary selection dial, dual push buttons, and an inverted high contrast LCD screen displaying an active 200.0 Amp reading.
Bosch PRO GFM1000-15 Open Fork Meter infographic diagram mapping out core tool features for enhanced search engine algorithms. Diagnostic indicator lines against a dark blue background call out the compact jaw opening, jobsite tough construction, True RMS technology, easy to read LCD display, and high quality silicone test leads.
An overhead view of a technician removing the rear battery compartment cover plates from the back of the Bosch PRO GFM1000-15 multi tester. The text banner below reads Power flexibility for use with 3.7V Li-Ion or AA batteries, highlighting dual fuel choices and automatic safety power cut off engineering.
The rugged Bosch PRO GFM1000-15 Digital Fork Meter standing vertically on a dusty jobsite surface in front of a coiled industrial power cable. The lower marketing graphic reads Jobsite tough with IP54 rating and rubber-reinforced housing, demonstrating high protection against heavy dust and water exposure.
A close up view of an electrician using the open fork jaw of the Bosch PRO GFM1000-15 electrical multi tester to non invasively check a circuit breaker line wire. The built in LED flashlight illuminates the tight wiring, with text stating Compact meter to detect voltage to 1000V and current to 200 A AC.
Official product warranty card information for the Bosch measuring and layout tools lineup. The layout features text highlighting a 1 year tool limited warranty, plus an additional 1 year coverage extension when you register the newly purchased product online within eight weeks.
An electrician using the Bosch PRO GFM1000-15 Open Fork Meter to diagnose lines inside an open electrical panel breaker box. The technician uses the test leads and multi tester simultaneously to check residential or commercial electrical systems with safety certified CAT IV 600V protection.
An industrial electrician wearing protective gear using the integrated LED flashlight on the Bosch PRO GFM1000-15 open jaw multi tester. The bright light cleanly illuminates a dark mechanical control terminal array to ensure safe, precise diagnostic troubleshooting on complex non linear loads.
A technician running diagnostic maintenance inside a large commercial electrical equipment cabinet utilizing the Bosch PRO GFM1000-15 true RMS fork tester. The image showcases one handed functionality and high visibility reading capture on the high contrast inverted LCD display panel.
An industrial electrician troubleshooting a large commercial circuit panel while utilizing the Bosch PRO GFM1000-15 Open Fork Meter. The true RMS electrical tester is mounted hands free to the side of the metal cabinet door with a black magnetic hanging solution, clearly displaying a voltage reading on its high contrast inverted LCD panel.
A close up view of a field technician inserting red and black premium silicone test leads into a wall outlet to run safety and voltage continuity tests. The Bosch PRO GFM1000-15 diagnostic electrical multi tester rests nearby on the carpeted floor, capturing real time system readings on its digital display panel.
An overhead close up view of a technician's hands holding the unlatched battery bay door and sealing components away from the reverse side of the Bosch PRO GFM1000-15 Open Fork Meter. The image demonstrates the internal battery terminal layout and rugged jobsite engineering on a textured concrete surface.
Bosch PRO GFM1000-15 Open Fork Meter complete kit displaying all original included components. The true RMS electrical multi tester tool sits vertically next to its premium flexible red and black silicone test leads, two standard AA batteries for power flexibility, and a heavy duty zippered black fabric carrying pouch featuring the red Bosch logo.
A close up front angled view of the standalone Bosch PRO GFM1000-15 Professional True RMS Open Fork Meter electrical tester. The design shows the open jaw testing fork, blue and black rubber reinforced housing, large red rotary selection dial, dual push buttons, and an inverted high contrast LCD screen displaying an active 200.0 Amp reading.
Bosch PRO GFM1000-15 Open Fork Meter infographic diagram mapping out core tool features for enhanced search engine algorithms. Diagnostic indicator lines against a dark blue background call out the compact jaw opening, jobsite tough construction, True RMS technology, easy to read LCD display, and high quality silicone test leads.
An overhead view of a technician removing the rear battery compartment cover plates from the back of the Bosch PRO GFM1000-15 multi tester. The text banner below reads Power flexibility for use with 3.7V Li-Ion or AA batteries, highlighting dual fuel choices and automatic safety power cut off engineering.
The rugged Bosch PRO GFM1000-15 Digital Fork Meter standing vertically on a dusty jobsite surface in front of a coiled industrial power cable. The lower marketing graphic reads Jobsite tough with IP54 rating and rubber-reinforced housing, demonstrating high protection against heavy dust and water exposure.
A close up view of an electrician using the open fork jaw of the Bosch PRO GFM1000-15 electrical multi tester to non invasively check a circuit breaker line wire. The built in LED flashlight illuminates the tight wiring, with text stating Compact meter to detect voltage to 1000V and current to 200 A AC.
Official product warranty card information for the Bosch measuring and layout tools lineup. The layout features text highlighting a 1 year tool limited warranty, plus an additional 1 year coverage extension when you register the newly purchased product online within eight weeks.
An electrician using the Bosch PRO GFM1000-15 Open Fork Meter to diagnose lines inside an open electrical panel breaker box. The technician uses the test leads and multi tester simultaneously to check residential or commercial electrical systems with safety certified CAT IV 600V protection.
An industrial electrician wearing protective gear using the integrated LED flashlight on the Bosch PRO GFM1000-15 open jaw multi tester. The bright light cleanly illuminates a dark mechanical control terminal array to ensure safe, precise diagnostic troubleshooting on complex non linear loads.
A technician running diagnostic maintenance inside a large commercial electrical equipment cabinet utilizing the Bosch PRO GFM1000-15 true RMS fork tester. The image showcases one handed functionality and high visibility reading capture on the high contrast inverted LCD display panel.
An industrial electrician troubleshooting a large commercial circuit panel while utilizing the Bosch PRO GFM1000-15 Open Fork Meter. The true RMS electrical tester is mounted hands free to the side of the metal cabinet door with a black magnetic hanging solution, clearly displaying a voltage reading on its high contrast inverted LCD panel.
A close up view of a field technician inserting red and black premium silicone test leads into a wall outlet to run safety and voltage continuity tests. The Bosch PRO GFM1000-15 diagnostic electrical multi tester rests nearby on the carpeted floor, capturing real time system readings on its digital display panel.
An overhead close up view of a technician's hands holding the unlatched battery bay door and sealing components away from the reverse side of the Bosch PRO GFM1000-15 Open Fork Meter. The image demonstrates the internal battery terminal layout and rugged jobsite engineering on a textured concrete surface.
BOSCH

Bosch Fork Meter GFM1000-15 True RMS Electrical Tester (200A AC 1000V AC DC Voltage NCV IP54 CAT IV 600V Open Jaw Diagnostic Tool)

In stock
SKU: GFM1000-15
$185.00 USD

Description

Bosch Promtional Logo Logout

Bosch PRO True RMS Open Fork Meter GFM1000-15 Electrical Tester CAT IV 600V

The Bosch PRO GFM1000-15 Professional Open Fork Meter functions as an industrial-grade electrical testing and diagnostic instrument engineered to perform non-invasive AC current measurements, voltage checks, and phantom voltage elimination across crowded electrical distribution panels. Featuring an open-fork jaw architecture, this electrical multi-tester measures AC current up to 200A without breaking circuits, AC/DC voltage up to 1,000V, low-impedance (LoZ) voltage up to 1,000V, and resistance up to 60 MΩ. Certified to CAT IV 600V / CAT III 1000V safety classes with an IP54 dust and splash-resistant housing, this open-jaw meter incorporates True RMS technology, an integrated Non-Contact Voltage (NCV) detector, a 6-foot drop-tested chassis, and an LED panel flashlight to isolate circuit faults in high-density commercial equipment.

Best Used For:

  • Non-Invasive Commercial Current Testing: Sliding the open-fork jaw over individual conductors to measure AC current up to 200A in tight distribution boxes without breaking circuit connections.
  • Ghost Voltage & Stray Line Identification: Utilizing the Low Input Impedance (LoZ V) mode up to 1,000V to discharge induced stray voltages across adjacent live wiring runs.
  • High-Safety Industrial Panel Diagnostics: Testing high-energy commercial circuits up to 1,000V AC/DC safely under CAT IV 600V / CAT III 1000V safety environments.

Key Performance & Safety Features

  • Open-Fork Non-Invasive Jaw Design: Allows rapid, one-handed AC current testing up to 200A over live conductors in tight, crowded junction boxes.
  • LoZ Ghost Voltage Elimination Mode: Low input impedance circuit dissipates misleading phantom voltage readings caused by capacitive coupling in parallel wire runs.
  • Precision True RMS Signal Processing: Delivers accurate current and voltage measurements on complex non-linear loads, distorted waveforms, and variable frequency drives.
  • CAT IV 600V / CAT III 1000V Safety Rating: Certified to withstand extreme electrical transient spikes on primary service entrances and industrial distribution panels.
  • IP54 & 6-Foot Drop-Tested Protection: Rugged, rubber-molded housing resists water splashes, jobsite dust, and accidental drops up to 6 feet onto concrete.
  • Integrated NCV Detector & LED Flashlight: Features non-contact voltage proximity sensing for rapid live-line checks alongside a high-output LED torch for unlit enclosures.

What's Included

  • (1) Bosch PRO GFM1000-15 True RMS Open Fork Meter
  • (1) Set of Premium Flexible Silicone Test Leads
  • (2) Standard AA Alkaline Batteries

Technical Specifications

Brand Name Bosch
Model Number SKU GFM1000-15
Measurement Technology True RMS (Root Mean Square)
Safety Classification Rating CAT IV 600 V / CAT III 1000 V Certified
Ingress Protection Rating IP54 (Dust & Splash Proof)
Drop Resistance Rating 6 ft. (2 m Impact Resistant)
Maximum AC Current Range & Accuracy 200 A (± 3.0% + 3)
Maximum AC Voltage Range & Accuracy 1,000 V (± 1.5% + 5)
Maximum DC Voltage Range & Accuracy 1,000 V (± 1.0% + 2)
Low Input Impedance (LoZ) Range 1,000 V AC/DC (Ghost Voltage Elimination)
Maximum Resistance Range 60 MΩ
Frequency Measuring Range 10 Hz to 50 kHz
Non-Contact Voltage (NCV) Detector Integrated Audio-Visual Proximity Sensor
Display Type High-Contrast Inverted LCD Screen
Power Source Options (2) AA Batteries or Optional 3.7V Li-Ion Pack

Pro-Tip: Switch to LoZ (Low Input Impedance) mode whenever troubleshooting wiring inside conduit runs that carry multiple energized circuits. The LoZ setting places a small load across the test leads, bleeding off false "ghost" voltages induced by neighboring live wires so you only measure true electrical potential.