PTFE Thermal Flow Switch

Overview of PTFE Thermal Flow Switch

The PTFE Thermal Flow Switch is an advanced electronic switch designed to monitor and control the flow of aggressive liquid or gas media where traditional stainless steel sensors would fail.

• What is it? Flow switches are primarily installed in-line or inserted into pipelines carrying corrosive fluids. It monitors the flow rate and triggers an alarm signal (Relay, PNP, or NPN) if the flow crosses a preset threshold, protecting expensive chemical pumps and preventing equipment from dry burning.

• Principles of Operation: Based on the thermal principle, the sealed PTFE probe contains two resistors: one is heated as the detection resistance, and the other is unheated as the reference resistance. When the medium flows, heat from the heated resistor is carried away, changing its resistance value. The difference between the two resistance values is then used as the basis for judging the flow rate.

• Main Application Field: Mainly used in chemical processing, semiconductor wet benches, electroplating lines, and wastewater treatment. This includes monitoring the circulation of sulfuric acid, hydrochloric acid, hydrofluoric acid, and strong alkaline solutions, as well as chemical pump idling protection.

• Key Characteristics: The defining feature is its exceptional chemical inertness due to the PTFE construction. Combined with a no-moving-parts design, it offers a maintenance-free solution that is immune to clogging and mechanical failure. It offers multiple mounting options and can withstand high-interference industrial environments.

Features of PTFE Thermal Flow Switch

Here is a summary of the main selling points of the PTFE Thermal Flow Switch:

• Superior Corrosion Resistance: All wetted parts are made of high-purity PTFE, providing a robust barrier against almost all chemical reagents, acids, and bases.

• Maintenance-Free Design: The product has no moving parts, fundamentally eliminating the risk of mechanical wear and failure, ensuring long-term stable operation.

• Wide Media Compatibility: Suitable for monitoring the flow of various corrosive fluid media, including acids, alkalis, and high-purity water, where metal contamination must be avoided.

• Versatile Signal Output: Provides multiple signal output options, including Relay, PNP, and NPN, facilitating easy integration with chemical dosing systems and PLCs.

• High Reliability: Features multiple electrical protections, including inverted phase, short circuit, and overload protection, with an IP65 protection class to ensure safety in harsh environments.

• Flexible Mounting: Offers multiple installation options to fit existing chemical piping systems, including threaded or flanged connections, meeting diverse site requirements.

Applications of PTFE Thermal Flow Switch

The PTFE Thermal Flow Switch is widely used in applications that require precise monitoring of corrosive fluid flow status and the protection of critical equipment:

• Chemical Dosing and Transfer: Monitoring the flow of aggressive chemicals to ensure precise dosing and to protect pumps from running dry.

• Pickling and Plating Lines: Ensuring the continuous circulation of acids in metallurgical pickling tanks and electroplating baths.

• Semiconductor Manufacturing: Flow monitoring of high-purity etching chemicals and ultrapure water (UPW) where metal ions cannot be present.

• Wastewater Treatment: Detecting flow in lines carrying hazardous waste or chemical neutralizers.

• Acid and Alkali Cooling Systems: Protecting heat exchangers and reactors that use corrosive fluids as cooling media.

Price of PTFE Thermal Flow Switch

The price of a PTFE Thermal Flow Switch varies depending on specific parameters, probe length, connection types, and configuration requirements. 

If you would like to know the latest price of ZINACA’s PTFE Thermal Flow Switch, please contact us for a detailed quotation.

PTFE Thermal Flow Switch OEM Service

ZINACA Instruments is a professional industrial instrument manufacturer specializing in pressure, temperature, flow, and level measurement devices. 

• We provide OEM and customization services for PTFE Thermal Flow Switches based on your specific chemical process requirements and working conditions. 

• If you are looking for a reliable OEM partner for corrosion-resistant flow switch products, please feel free to contact ZINACA Instruments.

PTFE Thermal Flow Switch Manufacturer

ZINACA Instruments is a trusted PTFE Thermal Flow Switch manufacturer with extensive experience in industrial automation instruments. Our products are ISO 9001, CNAS, IAF, SIL, and ACM certified, ensuring high quality, reliability, and durability in harsh chemical environments. They deliver safe and stable performance across the chemical, pharmaceutical, semiconductor, and environmental industries.

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