Description
Product Overview
The Niiyen PDT R3/4 HFS-20 Target Flow Controller is engineered for demanding industrial environments where precise water flow regulation is essential. Constructed with a solid brass paddle and an ABS‑protected housing, the unit meets IP54 standards, safeguarding internal components from dust and splashing water. Its mechanical micro‑switch operates on a 15 A/250 V rating, delivering reliable performance across a wide voltage range. The flow sensor features an adjustable set point, allowing users to fine‑tune activation thresholds to match specific process requirements. With a contact life expectancy of up to 100,000 actuations, the device ensures long‑term durability and minimal maintenance. Physical dimensions of 5.12 × 2.76 × 3.15 inches and a weight of 14.4 oz make it compact enough for tight installations while still providing robust functionality.
![[Product front view showing all components]](https://www.oelvora.store/wp-content/uploads/2026/07/1786aeeda4744766aa7df64e0845ff55.jpg)
Usage
This flow switch excels in a variety of water‑based systems. In water‑treatment plants, it monitors and controls the flow of treated water, preventing over‑pressurization and ensuring consistent output. HVAC installations benefit from its ability to detect flow in cooling circuits, automatically shutting down pumps when flow drops below safe levels, thereby protecting compressors and extending equipment life. The device is also ideal for chilled water loops in industrial chillers, where precise flow detection helps maintain optimal temperature differentials. Its wall‑mount design simplifies integration into existing pipework, and the brass paddle resists corrosion even in aggressive water chemistries. The sensor operates effectively within a temperature range of 1 °C to 100 °C (33.8 °F to 212 °F) and can handle pressures up to 10 bar, making it suitable for most standard hydraulic and pneumatic applications.
Why Choose Us
Choosing the Niiyen PDT R3/4 HFS-20 means selecting a product backed by rigorous quality control and a reputation for reliability. Niiyen’s manufacturing process incorporates precision machining of the brass paddle, ensuring consistent actuation force and repeatable performance. The ABS housing is molded to exact specifications, providing a tight seal that meets IP54 standards without compromising ease of installation. Each unit undergoes a comprehensive functional test, verifying the micro‑switch operation, set‑point accuracy, and electrical safety before shipment. In addition, Niiyen offers responsive technical support and a clear warranty policy, giving customers confidence that any issues will be addressed promptly. The combination of durable materials, proven design, and dedicated after‑sales service makes this flow controller a cost‑effective solution for long‑term operational stability.
Key Features
- Robust brass paddle provides corrosion resistance and long‑term reliability.
- IP54‑rated ABS housing protects against dust and water splashes.
- Mechanical micro‑switch supports 15 A/250 V, suitable for a wide range of circuits.
- Adjustable flow set point lets you customize activation thresholds for any application.
- Over 100,000 actuations guarantee minimal maintenance and downtime.
- Compact wall‑mount design simplifies installation in tight spaces.
- Operates from 1 °C to 100 °C and up to 10 bar pressure for versatile use.
- Dedicated technical support and warranty ensure peace of mind.
FAQ
What types of fluids can the PDT R3/4 HFS-20 handle?
The flow controller is designed for water and water‑based solutions within a temperature range of 1 °C to 100 °C and a maximum pressure of 10 bar. It is not recommended for corrosive chemicals or fluids that exceed these limits.
How do I adjust the flow set point?
Adjustment is performed by turning the calibration screw on the side of the unit. Turning clockwise raises the activation flow rate, while counter‑clockwise lowers it. Use a calibrated flow meter to verify the set point after adjustment.
Can the device be used in outdoor installations?
Yes, the IP54 rating provides protection against dust and splashing water, making it suitable for outdoor environments as long as it is sheltered from direct rain and extreme temperature fluctuations.
What is the expected lifespan of the micro‑switch contacts?
Under normal operating conditions, the contacts are rated for up to 100,000 actuations, which typically translates to several years of continuous use in most industrial applications.
Is there a warranty or after‑sales support?
Niiyen offers a one‑year limited warranty covering manufacturing defects. Technical support is available via phone and email to assist with installation, troubleshooting, and spare part inquiries.
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