Portable Ultrasonic Liquid Level Indicator – Smagall HS-MLI

When maintaining or working with a fire suppression system, it is inevitable that you will need to regularly monitor the level of gas remaining in the tanks (regardless of whether it is CO2, Halon, FM200 or any other types of gases).

With Smagall Ultrasonic Liquid Level Indicator, the task of monitoring the gas level no longer need to be costly, dangerous or time consuming – it eliminate the need of having to install costly monitoring system for individual tanks or having to carry the gas tanks and weigh them individually.

Instead, you’ll just need to switch on the liquid level indicator, place the probe against the tank and you will be able to quickly detect the presence of gas (in liquid form) at that particular level. And hence by shifting the probe at various levels (height) of the tank, you will be able to quickly determine the amount of gas left in the tank (by finding out which is the highest level where liquid has been detected). All done within seconds, easily and safely.

Commonly used by our customers on CO2, Halon, FM200™, NAF S III, FE 13, CEA 410 & Novec 1230 Tank. In fact, as long as the gas is in liquid state and the wall thickness of the tank is between 3mm – 30mm, Smagall Ultrasonic Liquid Level Indicator can be deploy to quickly and accurately determine the level of gas remaining in the tank.

Main use:

To measure the presence or absence of liquid at a certain level in a container or a pipeline. This will allow you to effectively determine the amount of gas left in the tank/container/pipeline.


  • Portable
  • No contact with medium (gas) required
  • No physical alteration (drilling, wielding etc) of tank/cylinder required
  • Cost saving – can be used on as many tanks/cylinders that you have
  • Operation is simple and be used by anyone without special training
  • Accurate result with a <5mm accuracy
  • Instant result – the presence (or non-presence) of liquid in the tank will be displayed instantly on the liquid level indicator
  • High contrast OLED colour display allows it to be used even in outdoor under strong light

Package Options:

  • HS-MLI-1: Includes 1x Standard Probe Rode (Ex-stock)
  • Hs-MLI-2: Includes 1x Extension Probe Rode (Pre-order)
  • Hs-MLI-3: Includes 1x 90 Degree Probe Rode (Pre-order)
  • Hs-MLI-4: Includes 1x Standard Probe Rode + Extension Probe Rode (Pre-order)
  • Hs-MLI-5: Includes 1x Standard Probe Rode + 1x 90 Degree Probe Rode (Pre-order)


Product Specifications:

Tank material Steel, Stainless Steel, Glass, Unformed Plastics
Table Table
Measurable medium Pure Liquid, Milky Liquid, Suspension Liquid
Operating temperature -20°C~60°C (-4°F~140°F)
Operating environment humidity 15%~85%RH
Power supply 2 x 18650 lithium batteries
Operation Duration 10 hours(when using 2 batteries )
Certifications CE, ISO-90001 Registered
Standard Package Includes
  • 1 x HS-MLI Portable Ultrasonic Liquid Level Indicator
  • 1 x Standard Probe
  • 1 x Instruction Manual
  • 1 x Carrying Case
  • 2 x 18650 lithium rechargeable batteries (pls note that batteries will not be provided for exports)

Do check out the below video if you would like to know more about how the ultrasonic liquid level indicator works and how to use it:

Questions and answers of the customers