AC/DC Precision MilliGauss Meter (GU-3001) with Case

Lutron GU-3001 High Precision AC/DC Milli Gauss Meter, ±3000 mG, with Case

The Lutron GU-3001 measures both DC (static) and AC magnetic fields down to 0.1 milligauss. It uses an exclusive high sensitivity sensor rather than a conventional Hall element, which is what allows it to resolve fields this small — it is sensitive enough to read the Earth's own magnetic field as a reference. Readings are shown in milligauss or micro Tesla, with an N pole / S pole indicator so you know the polarity of a static field as well as its strength.

The sensor is on a separate corded probe, so the probe can be fixed in place or reached into a tight spot while the meter is read comfortably. A zero adjustment button cancels the ambient background field, which is how you make a precise relative measurement of a part or a material rather than measuring the room it is sitting in. Data hold freezes a reading, and maximum and minimum values are recorded with recall.

NOTE: This meter is uniaxial — it measures the field component along one axis of the probe head. For an unknown field, rotate the probe to find the maximum reading, which is the true field strength and direction.

Typical Applications

• Checking residual magnetism in machined parts, tooling, bearings and fixtures before assembly or welding.
• Verifying demagnetization after magnetic particle inspection or machining.
• Measuring the field strength of permanent magnets and magnetic assemblies.
• Surveying AC magnetic fields around transformers, motors, panels and wiring.
• Screening locations for sensitive equipment — electron microscopes, imaging equipment and CRT displays are affected by stray fields.
• Quality control on materials and components that must be non-magnetic.
• Laboratory and classroom work, including measuring the Earth's magnetic field.

Features

• DC and AC milligauss magnetometer in one meter.
• Exclusive high sensitivity sensor with better performance than the traditional Hall element sensor, for high precision magnetic field measurement.
• Wide measuring range of ±3000 milligauss.
• Detects magnetic fields as small as 0.1 milligauss.
• Measures in milligauss (mG) or micro Tesla (µT).
• N pole / S pole indicator for DC field polarity.
• Separate corded probe for easy operation and convenient remote measurement.
• Precise enough to measure the absolute environmental Earth's magnetic field as a reference.
• Zero adjustment button cancels the background field for relative measurement.
• Large S-TN type LCD with high contrast for easy readout.
• Data hold function freezes the displayed value.
• Records maximum and minimum readings with recall.
• RS-232/USB computer interface.
• Microprocessor circuit assures maximum possible accuracy and provides special functions.
• Auto shut off saves battery life, and can be disabled for continuous monitoring.
• Powered by batteries or by an optional DC 9V adapter.
• Heavy duty compact housing with hard carrying case, designed for easy carry and operation.

Specifications

• Measuring range: -3000 to 3000 mG, or -300.0 to 300.0 µT.
• Field direction: uniaxial.
• Frequency response: DC, and AC from 40 Hz to 10 kHz.
• Accuracy: ± (2% of reading + 2 mG), over -1000 to 1000 mG and -100.0 to 100.0 µT.
• Over range indication: displayed at 3500 mG and above, or -3500 mG and below.
• Circuit: custom one-chip microprocessor LSI.
• Display: 52 x 38 mm dual function LCD.
• Display sampling time: approximately 1 second.
• Data hold: freezes the displayed reading.
• Memory recall: maximum and minimum values.
• Power off: manual off by push button, or auto shut off to save battery life.
• Data output: RS-232/USB PC serial interface via 3.5 mm terminal. The optional UPCB-02 cable provides an RS-232 plug; the optional USB-01 cable provides a USB plug.
• Meter dimensions: 6.8 x 2.7 x 1.7" (173 x 68 x 42 mm).
• Probe dimensions: 7.0 x 1.1 x 0.7" (177 x 29 x 17 mm).
• Meter weight: 11.3 oz (321 g), battery included.
• Probe weight: 2.8 oz (78 g).
• Operating temperature: 32 to 122 °F (0 to 50 °C). NOTE most batteries are not rated for use below -4 °F or above 125 °F.
• Operating humidity: less than 85% RH.
• Power supply: six 1.5V AAA (UM4) alkaline or heavy duty batteries, or an optional DC 9V adapter.
• Power consumption: approximately 20.5 mA DC.

Resolution

Specifications are tested in an environment with RF field strength less than 3 V/m and frequency less than 30 MHz.

Accessories Included

• Magnetic field probe, 1 pc.
• Hard carrying case, CA-06, 1 pc.
• Instruction manual, 1 pc.

Optional Components

• RS-232 cable, UPCB-02.
• Lutron USB data acquisition cable with driver, USB-01.
• Lutron data acquisition software for Windows, SW-U801-WIN.
• 110V AC to 9V DC adapter, AP-9V110.
• USB to 9V DC power cable, USBP-59.