EM4000 EMA thickness gauge

Quick-detachable connections on the sensor and device
Color LED display capable of displaying A-scans
Availability of measuring metal thickness and thickness of metal coating
Measurement of thickness in objects heated up to 750 °C


on request


The EM4000 EMA thickness gauge is designed for thickness measurement on steel pipes, sheet metal, rods, and other products made from steel, aluminum and other metals, with a operating gap of up to 3 mm between the sensor and metal. Operation of the EMA thickness gauge requires no preliminary surface preparation, no couplant is required. The gap can consist of dirt, layer of rust, layer of salt deposits or other non-conductive coating (paint, varnish, enamel, plastic, etc.). In addition to measuring metal thickness, the EM4000 allows measuring the thickness of non-conductive coating on metal.

A special sensor allows using the EM4000 thickness gauge for thickness measurements on objects heated up to 750 °C. Skew makes a minor effect on the device’s readings, in contrast to conventional thickness gauges with piezoelectric transducers that require sensor fixed in a certain position. The EM4000 thickness gauge has a color display protected by shock-resistant glass. The device uses a special data processing algorithm that provides correct thickness measurements in the presence of disturbing factors such as metal anisotropy, usage of several reflectors, exposure to external interference. The algorithm developed by our experts allows reducing the human factor and simplifying the device interface.


The EM4000 electromagnetic acoustic thickness gauge is capable of connecting to a tablet, smartphone or another device based on the Android OS. This allows expanding the thickness gauge features, analyzing A-scans, B-scans, working with strobes, selecting a thickness measurement mode, signal processing parameters, etc. The EMA thickness gauge can be connected to a tablet either wirelessly via Bluetooth or using a USB cable.


EM4000 technical specifications

Range of measured thickness for steel 2..80 mm
Range of measured thickness for steel without gap 2..200 mm
Thickness measurement error 0.08 mm
Permissible gap between the sensor and tested object with the EMT14012 transmitter up to 3 mm
Range of measured thicknesses in non-conductive coatings 0…4 mm
Measurement error for non-conductive coating thickness 0.1 mm ±3%
Permissible sensor skew relative to the tested object surface normal ± 25°
Lowest permissible radius of curvature of the tested object surface ≥10 mm
Highest number of measurements per second 4
Range of sound velocity setting 1000…9999 m/s with 1 m/s step
Operating frequency of the device 4 MHz
Duration of continuous work without battery recharge 7 hours
Range of operating ambient temperature -20…+50 °C
Range of operating temperature on the tested object surface -20…+80 °C (-20 …+750 °C
where the EMT40004T transducer is used)
Dimensions 185 x 43 x 35 mm

Using the device:

Additional materials:




Standard EMA transducer for the EM4000 thickness gauge

on request



High temperature EMA transducer for the EM4000 thickness gauge

on request



Protective cap for the EM4000 thickness gauge

on request