Under the strict hygiene standards of the food industry，PN-LR straight insertion liquid level transmitter stands out with its stainless steel material and precise measurement advantage。This article will share successful cases of this product in practical applications，providing users with a reliable liquid level monitoring solution，helping to improve production efficiency and safety。

Special requirements for liquid level monitoring in the food industry

During food processing，there are near second-level requirements for liquid level monitoring equipment。First，equipment must comply with international hygiene standards such as FDA and EHEDG，ensuring it does not become a breeding ground for bacteria。Second，under acidic or alkaline environments or high-temperature cleaning conditions，the sensor needs to remain stable。The PN-LR straight insertion liquid level transmitter uses 316L stainless steel material，with a surface roughness of Ra≤0.8μm，fully meeting the hygienic requirements of food-contact surfaces。Its IP68 protection rating better copes with high-pressure washdown environments，preventing liquid ingress from causing measurement errors。

Typical application scenario analysis

In a fermentation tank monitoring project of a well-known dairy enterprise，traditional float-type sensors were discarded because they were difficult to clean thoroughly。After changing to the PN-LR straight insertion liquid level transmitter，its fully immersed contact structure avoided sanitary dead corners，and the 0.5% measurement accuracy significantly improved fermentation process control。Another case occurred on a fruit pulp concentration production line，model JWP-801D，after continuous operation for 6 months at 80℃，still maintained a liquid level detection error of ±3mm，far beyond the industry average level。These practices verified the unique advantage of the straight-tube design in measuring viscous liquids。

In-depth comparison of technical parameters

Key points for operation and maintenance

Correct installation methods directly affect measurement accuracy。It is recommended that when installing on the storage tank sidewall，the sensor probe should be at 15° to the horizontal plane，avoiding interference from material accumulation。In routine maintenance，a zero-point calibration should be carried out every month，using dedicated calibration tools to adjust the 4-20mA output signal。For different media characteristics，Xi'an Shenghong Chuang provides customized medium density compensation algorithm services，for example，when measuring fluids such as yogurt and other non-cow-milk liquids，dynamic viscosity compensation can be activated，ensuring measurement stability of models such as LC-502。

Why choose our solution

As a key high-tech enterprise in Xixian New Area，we have 20 years of sensor development experience，all products have ISO9001 and SIL2 certification。For the MB261 series specially developed for the food industry，hygienic process fittings are adopted，shortening the CIP cleaning cycle。Now，you can obtain the 《Food Machinery Sensor Selection Guide》 through consultation，and our professional technical team will design the best HD502 or LDUSC model configuration scheme for you，contact phone：029-XXXXXXX，allowing precise measurement to safeguard food safety。