PLI DIGITAL™ Portable Liquid Level Gauge

Overview of the PLI Digital liquid level gauge

With all the features of the original PLI , the fully American Bureau of Shipping (ABS) Type Approved PLI Digital has the ability to take a reading from cylinders in poor condition, or suffering from a layer of rust.  It also has an in-built thermometer (in both C & F), an easy-to-read digital display, one-button-set-up function for faster cylinder testing and smart plug, which enables the signal strength to be monitored by an audio signal from an internal speaker.



PLI Digital Technical Specifications

    • Accuracy:  ±1.5mm
    • Features:  Large graphic display ~ Automatic rapid set up ~ Temperature gauge in C & F to enable fast weight calculations ~ Smart plug-in to enable signal strength to be monitored as an audible signal from the internal speaker ~ Power boost facility for cylinders in poor condition ~ Cylinder wall thickness selector for thick (>4mm) or thin (<4mm) walled cylinders.pli-digi-case
    • Unit Dimensions: 210 x 130 x 55mm
    • Unit Weight: 540g (including batteries and leather case)
    • Sensor: 1.5m cable and magnetic clamp for hands-free use
    • Sensor Dimensions:  95 x 60 x 38mm
    • Temperature Range:  -10ºC to +50ºC*
    • 94cm-long extension armPLI-extension-arm
    • Power Supply: 4 x AA batteries
    • Battery Life:  20 hours nominal with 4 x AA batteries
    • Carry Case Dimensions: 450 x 370 x 100mm
    • Operational Weight:  650g
    • Shipping Weight:  2.5Kg

*Please note when the unit is being used to determine the level of liquid CO2, an ambient temperature of over 27ºC will not give a result, as above this temperature the CO2 changes state from a liquid to a gas.

1. Wipe clean the cylinder in the area that the sensor is to be placed and apply couplant to the sensor. Place the sensor in an area known to be above the liquid level.  Always orientate the sensor so the white dot is at the top.

2. Place the sensor in an area known to be above the liquid line.  The reading on the display may show anything between 5 and 12.  To calibrate the PLI Digital unit, press the SET button, the screen will say SETTING and the display bargraph will rise or fall until it reaches 10; you will hear a double bleep and the screen will say SET.

3. Place the sensor in an area known to be below the liquid level. The meter should read towards 0 but not below 0.

4. As the sensor is moved upwards towards the liquid level the meter will start to move towards 10. When the whole of the sensor footprint is above the liquid level, the meter will read 10.  When the sensor is at the liquid level the gauge reading will read a value of between 10 and 0.  What you are looking for is the large change in value between a reading below the liquid level and one above the liquid level.  A reading of approximately 5 at the liquid level is suggested.


ABS Manufacturing Assessment Certificate Number 16-LD3207821
PLI Digital ABS Product Type Approval Certificate Number 19-LD1835486-PDA
ISO 9001:2015 Certificate Number 14124458
NATO Stock Number 6680-99-155-5945
NCAGE Number U0B22
IIMS Corporate Membership Number C508
FPA Membership Number 27135
NFPA Membership Number 2800960

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