The 27MG ultrasonic thickness gauge is an economical and practical ultrasonic thickness gauge designed to accurately measure metal pipes, tanks, and other equipment that are corroded or eroded from one side. This instrument weighs only 340 grams and is designed ergonomically to be easily operated with one hand. Although the 27MG has a compact body, it has many innovative measurement capabilities, and the detection technology used is the same as that used in our more advanced thickness gauges. The sturdy and durable 27MG is powered by batteries and features a large backlit LCD screen that displays easy to interpret numbers. Its color coded keypad is simple and intuitive, allowing direct access to many key functions.

1、 Olympus thickness gauge standard function
-Automatic probe recognition: ensures optimized probe performance.
-Automatic zero compensation: can improve the accuracy of measuring hot surface materials.
-Gain adjustment: can improve the measurement performance of materials with strong sound attenuation, such as cast metals.
-Difference mode.
-High/low alarm settings.
-Minimum/Maximum Mode: The minimum or maximum thickness value can be obtained at a rate of 20 measurements per second.
2、 Design purpose
The design purpose of 27MG is to assist inspection personnel and maintenance engineers in monitoring the wall thickness changes of metal pipelines, tanks, beams, columns, and structural pipe plates whose inner walls are prone to corrosion. The ultrasonic thickness gauge emits sound waves from the outer side of the material being measured, and can quickly implement a cost-effective testing solution without damaging the workpiece.
3、 27MG ultrasonic thickness gauge probe
-Standard configuration: Equipped with an economical and practical D7910 twin probe, users can use this probe to complete thickness measurement operations for many basic corrosion applications.
-Other probes: Olympus also has a complete range of twin probe series products, which can measure extremely thin and thick materials, or small diameter pipe fittings. The Olympus probe compatible with 27MG has an automatic probe recognition function, which can optimize the performance of the probe by automatically calling the default V sound path correction.
4、 Technical specifications
1. Measurement
-Double crystal probe measurement mode: the time interval between the precise delay after the excitation pulse and the first echo.
-Thickness range: 0.080 mm to 635 mm (0.003 in. to 25.0 in.), depending on the material, probe type, surface conditions, and temperature.
-Material sound speed range: 0.508 mm/μ s to 18.699 mm/μ s (0.020 in./μ s to 0.7362 in./μ s).
-Resolution (optional):
- 低: 0.1 mm(0.01 in.)。
-Standard: 0.01 mm (0.001 in.).
-Probe frequency range: 2.25 MHz to 10 MHz (-3 dB).
2. General specifications
-Operating temperature range: -10 ° C to 50 ° C (14 ° F to 122 ° F).
-Keyboard: A sealed, color coded keyboard with tactile and auditory feedback.
-Chassis: impact resistant, waterproof, and equipped with sealing gaskets, with sealed interfaces on the chassis. Designed to meet IP65 standards.
-Dimensions (width x height x thickness): 84.0 mm x 152.4 mm x 39.6 mm (3.31 in. x 6.0 in. x 1.56 in.).
-Weight: 340 g (12 oz).
-Power supply: 3 AA alkaline batteries.
-Battery working time: The battery power supply time is generally 150 hours; If backlight is used, it can provide continuous power supply for 30 hours.
-Explosive Atmosphere: It can be safely operated in an explosive atmosphere environment as specified in NFPA 70, Section 500, Division I, Division 2, Group D, and has passed the testing specified in MIL-STD-810F 511.4 Procedure 1 of the US military standard.
-Standard: The design complies with EN15317 standard.
-Alarm mode: programmable high/low alarm set points with sound and visual indicators.
-Display:
-Display hold/blank mode: The screen display mode that displays hold or blank after measurement.
-Backlight: Field emission display, can be selected as "on" or "auto on".
-Receiver bandwidth: 1 MHz to 18 MHz (-3 dB).
-Metric/Imperial Mode: Metric or Imperial units.
-Display languages: English, French, German, Spanish, Italian, Portuguese, Russian, Polish, and Swedish.
5、 Olympus thickness gauge standard configuration
-27MG digital ultrasonic thickness gauge.
-Dual crystal probe.
-AA alkaline battery.
-Test block and coupling agent.
-Portable case.
-Wrist strap.
-User manual, stored on CD.
-Easy introductory manual.
-Measurement functions: minimum/maximum value mode, difference mode, gain adjustment freeze mode, automatic probe recognition, and zero compensation.
The standard kit may vary depending on your location. To learn more about the situation, please contact your local dealer.
6、 Choose accessories
-2214E (U8880014): 5 step test block, in imperial units.
-2214M (U8880016): 5 step test block, metric unit.
-27MG/RPC (U8780343): Rubber protective cover with neck strap and instrument stand.
To inquire about other accessories such as brackets, connecting rods, and coupling agents, please contact our company.
7、 Compatible probe
The 27MG ultrasonic thickness gauge is compatible with all products in our company's interchangeable twin probe series. These probes have different frequencies, diameters, and temperature adaptability, and can meet the requirements of almost all applications.
8、 Other performance indicators
| number | model | Probe frequency (MHz) | Connector Type | Position of connector | Scope in steel (mm) | Scope in Steel (Medium) (mm) | temperature range (℃) | tip diameter (mm) | Tooth tip circle diameter (medium) (mm) |
| U8450017 | D797-SM | 2 | Microdot | Straight | 3.5 - 635 | 0.150 - 25 | -420 | 22.9 | 0.9 |
| U8450016 | D797 | 2 | Potted | Right Angle | 3.5 - 635 | 0.150 - 25 | -420 | 22.9 | 0.9 |
| U8454038 | D7910 | 5 | Potted | Right Angle | 1.00 - 500.00 | 0.040 - 20.000 | 0 - 50 | 12.7 | 0.5 |
| U8450021 | D799 | 5 | Potted | Right Angle | 1.0 - 508 | 0.040 - 20 | -170 | 11 | 0.434 |
| U8450011 | D791-RM | 5 | Microdot | Right Angle | 1.0 - 508 | 0.040 - 20 | -420 | 11 | 0.434 |
| U8450008 | D790-SL | 5 | LEMO | Straight | 1.0 - 508 | 0.040 - 20 | -520 | 11 | 0.434 |
| U8450009 | D790-SM | 5 | Microdot | Straight | 1.0 - 508 | 0.040 - 20 | -520 | 11 | 0.434 |
| U8450007 | D790-RL | 5 | LEMO | Right Angle | 1.0 - 508 | 0.040 - 20 | -520 | 11 | 0.434 |
| U8450002 | D790 | 5 | Potted | Straight | 1.0 - 508 | 0.040 - 20 | -520 | 11 | 0.434 |
| U8620225 | MTD705 | 5 | Leper/Con | Right Angle | 1.0 - 19 | 0.040 - 0.75 | 0 - 50 | 5.1 | 0.2 |
| U8450010 | D791 | 5 | Potted | Right Angle | 1.0 - 508 | 0.040 - 20 | -520 | 11 | 0.434 |
| U8450014 | D794 | 5 | Potted | Straight | 0.75 - 50 | 0.030 - 2 | 0 - 50 | 7.2 | 0.283 |
| U8450018 | D798 | 7.5 | Potted | Right Angle | 0.71 - 100 | 0.028 - 4 | -170 | 7.2 | 0.283 |
| U8450019 | D798-LF | 7.5 | Potted | Right Angle | 0.71 - 100 | 0.028 - 4 | -170 | 8.9 | 0.35 |
| U8450020 | D798-SM | 7.5 | Microdot | Straight | 0.71 - 100 | 0.028 - 4 | -170 | 7.2 | 0.283 |
| U8454013 | D7226 | 7.5 | Potted | Right Angle | 0.71 - 100 | 0.028 - 4 | -170 | 8.9 | 0.35 |
| U8450012 | D792 | 10 | Potted | Straight | 0.5 - 25 | 0.020 - 1 | 0 - 50 | 7.2 | 0.283 |
| U8450013 | D793 | 10 | Potted | Right Angle | 0.5 - 25 | 0.020 - 1 | 0 - 50 | 7.2 | 0.283 |