PP magnetic flap level gauge

PP magnetic flap level gauge: a plastic level gauge resistant to strong acid and alkali corrosion

What is a PP magnetic flap level gauge?

The PP magnetic flap level gauge (full name: polypropylene magnetic flap level gauge) is a magnetic flap level gauge mainly made of polypropylene (PP) material. It utilizes the principle of a communicator and magnetic coupling technology, enabling an on-site intuitive liquid level display through an external flipping column, and can optionally be equipped with a remote transmitter to output a 4-20mA signal or switch alarm.

Compared to traditional 304/316L stainless steel magnetic flap level meters, PP material offers superior resistance to acid and alkali corrosion, is lightweight, and inexpensive, making it an ideal choice for level measurement of highly corrosive media such as hydrochloric acid, sulfuric acid, hydrofluoric acid, plating solutions, and wastewater.

Working principle of the PP magnetic flap plate level gauge

The float inside the main tube of the instrument rises and falls with the liquid level, with permanent magnets embedded inside the float. Through magnetic coupling, it drives the red and white flipping columns outside the main tube to flip (red indicates liquid, white indicates no liquid), enabling visible local indication without power supply.

If remote monitoring is required, a reed teleconverter can be bundled on the outside of the main tube to linearly convert the liquid level height into a standard current signal of 4-20mA or RS485 digital signal, then connect to the PLC/DCS system for automatic control and alarm interlock.

Core advantages of PP magnetic flap level gauges

• Outstanding corrosion resistance:P P material is resistant to most acids, alkalis, salts, and organic solvents (except for strong oxidizing acids such as concentrated nitric acid and fuming sulfuric acid), making it especially suitable for working conditions such as hydrochloric acid, dilute sulfuric acid, hydrofluoric acid, electroplating solutions, and dyeing wastewater.

• Lightweight design:P P-density is only 1/7 that of stainless steel, making it lightweight, easy to install and maintain, and requires low load-bearing capacity for tank flanges.

• High cost-effectiveness: For highly corrosive media, PP material costs far less than 316L stainless steel or fluorine-lined (PTFE) level gauges.

• Safe and pollution-free:P P material meets food-grade requirements and can be used for liquid level measurement in the pure water, pharmaceutical, and food industries.

• The viewing window is clear:P P The main tube is highly transparent (semi-transparent), and some designs allow direct observation of the internal float status to assist in judgment.

• Optional remote transmission function: remote transmission transmitters with PP material protective enclosures can be added, achieving dual functions of on-site display + remote monitoring.

Technical parameters of the PP magnetic flap level gauge

⚠️ Note that :P P material is not resistant to high temperatures (softens at >80°C) or strong oxidizing acids (concentrated nitric acid, fuming sulfuric acid, etc.). For such working conditions, please use PTFE (PTFE-lined PTFE) magnetic flap level gauges.

Typical application scenarios of PP magnetic flap level gauges

• Chemical industry: hydrochloric acid storage tanks, dilute sulfuric acid metering tanks, and alkali solution tank level monitoring.

• Environmental water treatment: electroplating wastewater, pickling waste liquid, neutralization tank, and regulation tank liquid level measurement.

• Pharmaceuticals/Food: pure water tanks, medicinal liquid preparation tanks, beverage storage tanks (meeting hygiene requirements).

• Metallurgy/Electroplating: Control of electrolyte, passivation solution, and cleaning tank liquid level.

• Laboratory/Small Storage Tanks: Economical level indicator solutions.

How to correctly ｓｅｌｅｃｔ a PP magnetic flap plate level gauge?

Provide the following parameters to the manufacturer to obtain an accurate selection plan:

1. Measurement range (L): Center distance between upper and lower flanges (mm).

2. Medium name and concentration: such as "31% hydrochloric acid," "10% sodium hydroxide," etc., to confirm compatibility.

3. Operating temperature and pressure:P P material has a temperature limit of 80°C and a pressure limit of 1.0MPa.

4. Medium specific gravity: Used to calculate the float's buoyancy; if the specific gravity is too low, a lightweight float needs to be customized.

5. Remote transmission required: 4-20mA / RS485 / alarm switch.

6. Connection flange specifications:D N20/DN25? Standards (China/US/Japan)?

7. Installation method: Side mounting (standard) or top mounting (please specify).

Comparison between PP magnetic flap level gauge and stainless steel/fluorine-lined level gauge

Common faults and maintenance of PP magnetic flap plate level gauges

Maintenance Recommendations: Clean the inner wall of the main tube regularly (every 3-6 months) to prevent medium crystallization or dirt buildup that could cause float jamming.

Why choose our PP magnetic flip plate level gauge?

• Genuine PP new material: Eliminates recycled material contamination, offers excellent aging resistance, and has a long service life.

• Customized services: measurement range, flange specifications, and remote signals can all be customized as needed.

• Precise float matching: For different specific gravity media, the float size and weight are precisely calculated to ensure reliable operation.

• Factory inspection: Each product undergoes hydrostatic testing and column flipping operation verification.

• Fast delivery: standard specifications ship in 3-5 days, non-standard orders in 7-10 days.

Get a quote for PP magnetic flap plate level gauges now

Need a PP magnetic flap level gauge? Provide your measurement range, medium name, temperature and pressure basic information, and we will respond with technical solutions and discounted quotations within 2 hours!