PX-7 Precision Thickness Gauge


The PX-7 is a precision gauge for measuring thicknesses from 0.0060 to 1.0000 inch, otherwise 0.15 to 25.40 mm.

The PX-7 Precision Thickness Gauge has a measuring range from 0.0060 to 1.0000 inch, (0.15 to 25.40 mm). Using a single element delay tip transducer, the gauge will measure very thin materials in the Echo-to-Echo Mode and automatically switch to Interface ­Echo Mode when measuring thicker materials and plastics. In the Echo-to-Echo Mode you have the ability to measure the thickness of materials without removing the paint or the coating.

THE PX -7 utilizes state-of -the-art digital tech­nology to produce fast and accurate read­ings. It is packaged in an all-aluminum sealed case making it resistant to the working environment. The gauge is simple to operate and features: Alarm Mode, Differential Mode, Internal Data-Logging and an RS-232 data output port to interface with a computer or other data acquisition system.


Weight: 10 ounces (with batteries).

Size: 2.5 W x 4.5 H x 1.24 D inches (63.5 W x 114.3 H x 31.5 D mm).

Operating Temperature: -20° to 120°F (-30° to 50°C).

Extruded aluminum body with nickel-plated aluminum end caps.

Sealed connectors and end caps.


Sealed membrane that is resistant to both water and petroleum products.

9 tactile-feedback keys.


Single element with delay tip. 10 to 22 MHz frequency range.

Locking quick disconnect LEMO connector. 4 foot cable.

Custom transducers available for special applications.


5 year limited.

Power Source

Two 1.5V alkaline or 1.2V NiCad AA cells.

Typically operates for 150 hours with alkaline and 100 hours with NiCad.

Display flashes when battery is low.

Unit turns off automatically when battery is too low to operate reliably.


Multi-function 4.5 digit liquid crystal display with 0.500 inch numerals, backlit for use in poor light conditions.

Backlight is selectable on / off / auto (illuminates only when taking a measurement).

Measurements displayed in inches, inches/microsecond, millimeters, and meters/second.

Bar graph indicates stability of reading.


Factory calibration traceable to national standards.


Range:  Measures from 0.0060 to 1.0000 inch (0.15 to 25.40 millimeters).

Switch to select English or Metric units.

Resolution: 0.0001 inch (0.001 millimeter)

Velocity Range: 0.0492 to .3937 in./µs. (1250 to 10,000 meters/second).

Measuring Modes

Interface to Echo, Echo-to-Echo, (through paint), Plastics, and Auto-Switchable.

Four readings per second for single point measurements or 8 per second in Scan Mode— captures the minimum thickness.

Single point calibration.


Differential Mode: Enter acceptable thickness value, unit will display +/- the difference from the value entered.

Alarm Mode: Enter a minimum acceptable thickness value. If measurement falls outside Hi/Lo limits, red LED will illuminate and sounds beeper.
If measurement is between Hi/Lo limits, green LED will illuminate.

Data Output: RS-232 output sends data to a serial printer, a computer or other external storage device.

Internal Data Logger

(PX-7DL only)

Automatic Data Logging System

1000 reading capacity, (10 files of 100 readings each).

OBST indicates no reading.

Complete with data acquisition software and cable.

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