Introduction

In corrosive media level measurement applications involving strong acids and strong alkalis, how should the AC-L3 anti-corrosion level transmitter be selected? This article provides a 3-step selection strategy for ceramic anti-corrosion and polytetrafluoroethylene level sensors of different models such as PTB603 and HJ833, helping engineering implementers quickly match the measurement requirements of harsh working conditions such as sulfuric acid and hydrochloric acid.

Step 1: Clarify the characteristics of the measured medium

In strong acid and strong alkali environments, the selection of a level sensor should first consider the corrosiveness, concentration, and temperature of the medium. Sensors made of different materials differ significantly in their adaptability to the medium:

• Ceramic anti-corrosion material (such as PTB603 and HJ833): suitable for strongly corrosive media such as 98% concentrated sulfuric acid and 50% sodium hydroxide, with temperature resistance up to 150℃
• Polytetrafluoroethylene material (such as T-51B and PRC-918): has excellent resistance to special media such as hydrofluoric acid and aqua regia, but its pressure resistance is slightly lower than ceramic
• Composite material (such as EVT-300B): combines ceramic sealing and fluororubber lining, suitable for corrosive slurries containing solid particles

It is recommended to refer to the GB/T 17626-2018 "Industrial process measurement and control devices" standard to quantitatively evaluate parameters such as the medium's pH value and oxidation-reduction potential.

Key Parameter Comparison Table

Step 2: Match the working environment requirements

In addition to medium characteristics, the installation environment directly affects the performance of the AC-L3 anti-corrosion level transmitter:

1. Pressure conditions: models such as LMP836 use a 316L stainless steel housing and can withstand 10MPa static pressure, suitable for deep well measurement
2. Electrical protection: BXY620F is IP68 certified and can operate underwater at a depth of 30 meters for a long time
3. Process connection: TS303 provides multiple interfaces such as flanges and threads, compatible with DN50~DN300 pipelines

Special scenarios such as the pharmaceutical industry require additional attention to FDA certification, while the food industry must comply with 3-A hygiene standards.

Step 3: Optimize the signal output solution

Modern anti-corrosion level sensors provide multiple signal output methods and should be selected according to the control system:

• 4-20mA analog signal: basic models such as PRC-918, with a transmission distance of up to 1000 meters
• HART protocol: EVT-300B supports remote parameter adjustment, suitable for smart factories
• RS485 digital output: the CYT-152 model can be networked to monitor multi-point liquid levels

It is recommended to pair with Shenghongchuang's XMT-3000 intelligent display instrument to achieve temperature compensation and automatic range calibration.

Summary and Action Guide

For level measurement of strongly corrosive media such as sulfuric acid and hydrochloric acid, it is recommended to select the AC-L3 anti-corrosion level transmitter according to the three factors of "medium-environment-signal". As a national high-tech enterprise, Xi'an Shenghongchuang Instrumentation Co., Ltd. can provide customized services for the full series of products such as PTB603 and T-51B, and all products have passed SIL2 functional safety certification.

Contact our technical engineers now: obtain the 3D installation drawings for the HJ833 anti-corrosion submersible level transmitter, or customize an exclusive polytetrafluoroethylene anti-corrosion solution.