Olympus 27mg





The Olympus 27MG is an affordable ultrasonic thickness gauge designed to provide accurate single-sided measurements on internally corroded or eroded metal pipes, tanks and other equipment. It only weighs 12 ounces. (340 g) and is ergonomically designed for easy one-handed operation. Despite its compact size, the 27MG has many innovative measuring features that take advantage of the same technology available in our more advanced thickness gauges. The durable, rugged 27MG is battery operated and features a large, backlit LCD with easy-to-read numbers, and an intuitive, color-coded keyboard with direct access to many key features.

Standard features include Automatic Probe Recognition to ensure optimum transducer performance, Auto Zero Compensation to improve measurement accuracy on hot surfaces, Gain Adjustment to improve measurements in sound absorbing materials such as cast metal, Differential Mode, Hi-Low Alarm setting and Min./ max. a mode that captures the minimum or maximum thickness at 20 measurements per second.

The 27MG is designed for inspectors and maintenance engineers who need to monitor wall thickness on metal pipes, tanks, beams, and structural supports that are prone to corrosion on internal surfaces. Ultrasonic thickness gauges provide a quick and cost-effective solution by transmitting sound to the material from outside, eliminating the need to damage the part.


The 27MG comes standard with a low cost D7910 dual element transducer that allows you to take thickness measurements for many basic corrosion applications. For measurements of very thin or thick materials, or small diameter pipes, Olympus has provided a complete range of dual element transducers. The 27MG compatible Olympus transducers feature Automatic Probe Recognition which optimizes transducer performance by automatically remembering the default V-path correction.

27MG with optional Protective Rubber Boot with Neck Strap and Gauge Mount


Measurement Dual element transducer measurement mode The time interval from the precision delay after the excitation pulse to the first echo
Thickness range 0.50 mm to 635 mm (0.020 inch to 25.0 inch) depending on material, transducer, surface condition, temperature
Material speed range 0.508 mm/μs to 18.699 mm/μs (0.020 in/μs to 0.7362 in/μs)
Resolution (selectable) Low: 0.1 mm (0.01 in.)
Standard: 0.01 mm (0.001 in.)
Transducer frequency range 2.25 MHz to 10 MHz (–3 dB)
General Operating temperature range -10 °C to 50 °C (14 °F to 122 °F)
Keypad The keypad is sealed and color coded with tactile and audible feedback
Case Impact-resistant and water-resistant gasketed casing with sealed connectors. Designed for IP65.
Dimension (W x D x D) 84.0 mm x 152.4 mm x 39.6 mm (3.31 inches x 6.0 inches x 1.56 inches)
Heavy 340 grams (12 ounces)
Power Supply 3 AA alkaline batteries
Battery life operating time Average battery life of 150 hours, 30 hours of continuous use with backlight
Exploding Atmosphere Safe operation as defined by Class I, Division 2, Group D, as found in the National Fire Protection Association Code (NFPA 70), Section 500, and tested using MIL-STD-810F 511.4 Procedure I
Standard Designed to EN15317
Alarm mode Programmable Hi/Low set point with audible and visual indicators
Displaying Display Hold/Empty mode Holds or clears the display after measurement
Backlight Electroluminescent backlight, Selectable as On or Auto On
Receiver bandwidth 1 MHz to 18 MHz (–3 dB)
Metric/English mode Metric or English units
Display language English, French, German, Spanish, Italian, Portuguese, Russian, Polish and Swedish


Standard package

  • 27MG digital ultrasonic thickness gauge
  • Dual element transducer
  • AA alkaline batteries
  • Uji blok dan kopling
  • Tote bag
  • Wrist strap
  • User manual on CD
  • Getting Started Guide
  • Measurement feature: Min./Max. mode, Differential mode, Gain Adjustment Freezing mode, Automatic Probe Recognition, Zero Compensation

Standard inclusions may vary depending on your location. Contact your local distributor.

Optional Accessories

  • 2214E (U8880014): 5-step test block, English units
  • 2214M (U8880016): 5-step test block, metric units
  • 27MG/RPC (U8780343): Protective rubber boots with Neck Strap and Gauge Mount


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