Portable Ultrasonic Liquid Level Indicator CO2, Halon, FM200™, NAF S III, FE 13, CEA 410 & Novec 1230 gaseous extinguishing systems (Model: HS-MLI)

The indicator is designed to offer a simple, accurate, rapid and reliable method of determining the presence of liquid, without the need to move or weigh the container. It can be used on cylinders, pipe-work and any single skinned holding vessel with various kinds of liquid medium. The indicator gives accurate results by generating an ultrasonic sound wave that travels through the container and into the liquefied gas or fluid. The pulse responds differently to the presence or absence of liquid, indicating the level of the liquid.

Product details


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The HS-MLI Portable ultrasonic Liquid Level Indicator is based on the principle of non-contact detection. It’s designed to offer a convenient way to find the presence or absence position of liquid level in the containers or pipelines which can not fix up other measuring equipment, such as CO2 tank, Halon tank, etc. It’s the best choice for the detection of dangerous toxic or corrosive liquids.

The HS-MLI Portable Liquid Level Indicator is also the only CE Approved ultrasonic level indicator available in China, which has produced this equipment more than 12 years.

2. Features


- No contact with medium 

- Suitable for toxic, corrosive, or invasive medium 

- No need for drilling or welding on tank wall 

- Advanced ultrasonic sensor technology 

- Reliable measurement results 

- Easy and convenient to operate and maintain 

- Ultrasonic adaptive detection algorithm. 

- High-contrast OLED color display, suitable for outdoor use under strong light 

- The ultrasonic-waveform-display function facilitates parameter testing, waveform comparing and application of other functions to ensure measurement accuracy in complicated situations

- Friendly user interface design

- Comprehensive software displays measurement result in a simple manner 

- Bilingual operation modes (Chinese/English) 

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3. Technical Specifications

Measurement accuracy 


Measurable range of wall thickness 


Measurable tank material 

Steel, stainless steel, glass, unformed plastics 

Measurable medium 

Pure liquid, milky liquid, suspension liquid 

Ambient temperature 

-20°C~60°C (-4°F~+140°F) 

Ambient humidity 


Power supply 

Two 18650 lithium batteries


150mAh (on average) 

Operation Duration (fully charged)

> 10 hours 

Applicable tank:

Vertical tank

Horizontal tank

Spherical tank (diameter > 3M)

CO2 tanks with any of the following diameter ranges: 215mm - 225mm, 270mm- 280mm, 345mm - 355mm 395mm-405mm

4.Probes optional

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 (1) Standard Probe         (2) Extensional Straight Probe      (3) Extension probe with 90 °angle

5. Package


6. Delivery

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7. Our clients


8. Certifications

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Address:Room 703, Block A, SOHO Greenland Building, Zhangba Road First, Gaoxin District, Xi’an City,Shaanxi Province, P.R.China

Tel: +86 29 65692249

Fax: +86 29 65691198

E-mail: info@smagall.com

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