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NDT Equipment and Accesories
Measuring and Testing Instruments


The Panametrics- NDT™ 25MX PLUS is an ultrasonic precision thickness gage that provides cost-effective solutions in applications where the opposite side of the test material is difficult or impossible to reach. Multipoint and single thickness measurements can be made on a wide variety of materials including metal, plastic, rubber, glass, fiberglass, and composites.


  • Single or multipoint thickness measurements
  • Connects up to 8 transducers
  • User selectable: number of channels, channel sequencing, and channel rate
  • Uses contact, delay line, and immersion transducers
  • Transducer frequency range 2 - 30 MHz
  • Wide thickness range, from 0.003 to 20 inches (0.080 mm - 500 mm) depending on application
  • Resolution up to 0.0001" (0.001 mm)
  • A-scan display for waveform verification
  • Application Auto-Recall with stored standard and custom setups
  • Alphanumeric file-based datalogger stores 18,000 thickness readings or 1,750 waveforms
  • Handheld, intuitive operation, long battery life

Mx-8 Multiplexer

Number of Channels: 1 to 8, user selectable
Channel Switching Rate: 1, 2, 4, 8, 16, or 20 Hz, user selectable
Size: 3.2" x 5.9" x 1.25"(149.9 mm x 81.3 mm x 31.8 mm)
Weight: 7.7oz. (.22 kg)

Multipoint Thickness Measurements
Connected to the optional MX-8 multiplexer, the 25MX PLUS has the ability to collect and display thickness measurements from up to 8 separate transducers.
Special software on the 25MX PLUS allows the user to select:

  • Number of channels (1-8)
  • Mux Mode
    • Off
    • Single Channel (manual switching)
    • Single Sequence (switch through selected channels on command)
    • Sequence (continuous channel switching)
  • Channel Rate (1, 2, 4, 8, 16 or 20 Hz; thickness output and channel number)

Single Thickness Measurements
The 25MX PLUS operates as a 'standard' precision thickness gage when not connected to the MX-8 Multiplexer.


TECHNICAL Specifications  


Mode 1: Time interval between excitation pulse and first backwall echo, using contact transducers.
Mode 2: Time interval between the first interface echo after the excitation pulse and the first backwall echo, using delay line or immersion transducers.
Mode 3: Time interval between successive backwall echoes following the first interface echo after the excitation pulse, using delay line or immersion transducers.

Thickness Measurement Range:
Steel: 0.006 - 20.000 inches
(0.150 - 508.00 mm)
Plastic: 0.003 - 2.0000 inches
(0.080 -50.00 mm)
Thickness range depends on material, transducer, surface condition, temperature, and set up selected.

Material Velocity Range:
0.02000 - 0.55110 inch/ µS
(0.5080 - 13.9979 mm/ µS)

Resolution: Keypad Selectable:

LOW: 0.01" 0.1 mm
STANDARD: 0.001" 0.01 mm
HIGH: 0.0001" 0.001 mm


Battery: 6 V Rechargeable NiCad battery pack, or field-replaceable alkaline AA batteries
Battery Life: 25 hours in normal measurement mode with backlight off
Fast-Charger: Two-hour Fast Charger with universal voltage
Auto Power Off: On or off


Transducer Frequency Range:   2-30 MHz (-3 dB)

Operating Temperature: -10 °C to +50 °C (+14 ° to 122 °F)

Keypad: Sealed color-coded keypad with tactile and audible feedback

Case: Impact-resistant and Water-resistant, gasketed Lexan ® case with sealed connectors. Environmental IP-65 compliant
Metric/English Units
Min/Max Mode

Two Alarm Modes: Programmable Hi-Low Alarm with audible and visual indicators.
1) Standard Hi-Low
2) Previous thickness

  • Absolute
  • Percentage

Two Differential Modes:
1) Thickness difference between actual measurement and reference value.
2) Percent difference between actual measurement and reference value.

Application Auto-Recall: Automatically adjusts internal parameters and zero offset for a wide variety of transducers.
Stored Standard Setups: 25 stored transducer setups to allow fast, easy calibration for our standard transducers.
Stored Custom Setups: Up to 35 stored custom transducer setups for best performance in special applications.

9.375 x 5.45 x 1.5" (238 x 138 x 38 mm)
Weight: 2.1 lbs. (0.95 kg)


Datalogger and RS-232: Identifies, stores, recalls, clears, and transmits thickness readings, waveform images, and gage setup information via the RS-232 Serial Port. Baud Rate, Word Length, Stop Bits, and Parity are adjustable from the keypad.

Maximum # of Stored Values:

Standard: 18,000 thickness readings or 1,750 waveforms with thickness
Upgrade 1: 36,000 thickness readings or 3,400 waveforms with thickness
Upgrade 2: 54,000 thickness readings or 5,100 waveforms with thickness
Location Codes: 8-character file name plus 16-character alphanumeric location code input. Multiple comments per location.
File Structures: 7 standard or custom application-specific file structures
Reports: On-gage reporting of: Summary with statistics, Min/Max with locations, and File Comparison. On-screen comparison of current and previous readings.


Display: Liquid Crystal Display with backlight. Contrast keypad adjustable. Display area 4.0 x 3.39 inch (102 x 86 mm)
Backlight, Zoom Mode, Freeze Mode and Hold/Blank

Rectification: RF, half wave positive or negative, and full wave
Waveform Display Range and Delay Control

Standard inclusions

Model 25MX PLUS Digital Ultrasonic Thickness Gage, AC or Battery Operation, 50-60 Hz, with Internal Alphanumeric Datalogger. Including: Universal Quick Charger/AC Adapter Transducer Cable, Test Block, Couplant, RS-232 I/O Cable, Carrying Case, Instruction Manual and Two Year Limited Warranty

Optional Accessories

MX8 MX-8 Multiplexer
PLUS/RPC Rubber Protective Pouch with Neck Strap
36DLP/SPC/KIT Protective Pouch with Neck Strap
WIN25DLPLUS Interface Program
25DLP/EW Extended Limited Warranty, 3rd Year
2214E 5-Step Test Block, 1018 steel, English Units: .100", .200", .300", .400", .500"; metric available
2213E 5-Step Test Block, Aluminum, English Units: .100", .200", .300", .400", .500"; metric available
6DLPLUS/HDC Heavy Duty Shipping Case
Please contact us for other accessories available with the Model 25MX PLUS.


*All specifications are subject to change without notice.