The Olympus 27MG is an affordable ultrasonic thickness gauge designed to make accurate, measurements from one side on internally corroded or eroded metal pipes, tanks, and other equipment.
It weighs 340 g and is ergonomically designed for easy, one-hand operation. Despite its compact size, the 27MG has many measurement features utilizing the same technologies that are available on our more advanced thickness gauges.
The durable, rugged 27MG is battery-operated and features backlit LCD with easy-to-read numerals, and an intuitive color-coded keypad with direct access to many key features.
27MG with the optional Protective Rubber Boot with Neck Strap and Gauge Stand
Standard features include Automatic Probe Recognition to ensure optimal transducer performance, Auto Zero compensation to enhance the accuracy of measurements on hot surfaces, Gain Adjust to improve measurements on sound-attenuating materials such as cast metals, Differential mode, Hi-Low Alarm settings, and a Min./Max. mode that captures the minimum or maximum thickness at 20 measurements per second.
The 27MG is designed for inspectors and maintenance engineers that need to monitor the wall thickness in metal pipes, tanks, beams, and structural supports that are susceptible to corrosion on the inside surface. An ultrasonic thickness gauge provides a quick, cost-effective solution by transmitting sound into the material from the outside, making it unnecessary to damage the part.
Transducers with Automatic Probe Recognition
The 27MG is compatible with our complete line of easy interchangeable dual element transducers that vary in frequencies, diameters, and temperature capabilities to deal with virtually every application.
| Transducer | Item Num | Freq. (MHz) | Connector | Tip Diam. mm | Range (Steel)1 mm | Temp. Range 2 ºC | Cable | Item Number |
| D7910 | U8454038 | 5,0 | 90° | 12,70 | 1,00 to 254 | 0 to 50 | Potted | — |
| D790 | U8450002 | 5,0 | Straight | 11,00 | 1,00 to 500 | -20 to 500 | Potted | — |
| D790-SM | U8450009 | Straight | LCMD-316-5B3 | U8800353 | ||||
| D790-RL | U8450007 | 90° | LCLD-316-5G3 | U8800330 | ||||
| D790-SL | U8450008 | Straight | LCLD-316-5H | U8800331 | ||||
| D791 | U8450010 | 5,0 | 90° | 11,00 | 1,00 to 500 | -20 to 500 | Potted | — |
| D791-RM | U8450011 | 5,0 | 90° | 11,00 | 1,00 to 500 | -20 to 400 | LCMD-316-5C | U8800345 |
| D7912 | Q4530005 | 10,0 | Straight | 7,50 | 0,50 to 25 | 0 to 50 | Potted | — |
| D7913 | Q4530006 | 10,0 | 90° | 7,50 | 0,50 to 25 | 0 to 50 | Potted | — |
| D797 | U8450016 | 2,0 | 90° | 22,90 | 3,80 to 635 | -20 to 400 | Potted | — |
| D797-SM | U8450017 | Straight | LCMD-316-5D | U8800355 | ||||
| D7226 | U8454013 | 7,5 | 90° | 8,90 | 0,71 to 50 | -20 to 150 | Potted | — |
| D798-LF | U8450019 | |||||||
| D798 | U8450018 | 7,5 | 90° | 7,20 | 0,71 to 50 | -20 to 150 | Potted | — |
| D798-SM | U8450020 | Straight | LCMD-316-5J | U8800357 | ||||
| D799 | U8450021 | 5,0 | 90° | 11,00 | 1,00 to 500 | -20 to 150 | Potted | — |
1 Dependent on material, transducer type, surface conditions, and temperature. Full range may require Gain Adjust.
2 Maximum temperature with intermittent contact only.
3 Stainless steel cable available; consult Olympus for details.
27MG Specifications
| Measurements | Dual element transducer measurement mode | Time interval from a precision delay after the excitation pulse to the first echo |
| Thickness range | 0.50 mm to 635 mm depending on material, transducer, surface conditions, temperature | |
| Material velocity range | 0.508 mm/μs to 18.699 mm/μs | |
| Resolution (selectable) | Low: 0.1 mm | |
| Standard: 0.01 mm | ||
| Transducer frequency range | 2.25 MHz to 10 MHz (–3 dB) | |
| General | Operating temperature range | -10 °C to 50 °C |
| Keypad | Sealed, color-coded keypad with tactile and audible feedback | |
| Case | Impact-resistant and water-resistant, gasketed case with sealed connectors. Designed for IP65. | |
| Dimensions (W x H x D) | 84.0 mm x 152.4 mm x 39.6 mm | |
| Weight | 340 g | |
| Power Supply | 3 AA alkaline batteries | |
| Battery life operating time | 150 h of typical battery life, 30 h continuous use with backlight | |
| Explosive Atmosphere | Tested using MIL-STD-810F 511.4 Procedure I | |
| Standards | Designed for EN15317 | |
| Alarm mode | Programmable Hi/Low set points with audible and visual indicators | |
| Display | Display Hold/Blank mode | Holds or blanks the display after measurements |
| 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 languages | English, French, German, Spanish, Italian,Portuguese, Russian, Polish, and Swedish |
- 27MG digital ultrasonic thickness gauge
- AA alkaline batteries
- Test block and couplant
- Carrying case
- Wrist strap
- User’s manual on CD
- Getting started Guide
- Measurement features: Min./Max. mode, Differential mode, Gain Adjust Freeze mode, Automatic Probe Recognition, Zero Compensation
*The рackage can be changed according to the manufacturer’s decision. Please specify when ordering.
Optional Accessories- 2214E (U8880014): 5-step test block, English units
- 2214M (U8880016): 5-step test block, metric units
- 27MG/RPC (U8780343): Protective rubber boot with Neck Strap and Gauge Stand
For additional accessories such as holders, wands, and couplants, please consult ETS team.
- U8880014
- U8880016
- U8780343
- U8780336
- U8202420
- U8780337
- 2214E : Test Block, 5-Step
- 2214M : Test Block, 5-Step
- 27MG-RPC
- 27MG INTERNATIONAL BASE KIT
- 27MG ENGLISH BASE KIT
- 27MG-CC CARRYING CASE FOR 27MG
Materials from the resource www.evidentscientific.com were used in the preparation of the website.
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