In the future, we will provide satisfactory services to our customers with new attitude, efficient management, leading technology and superb quality of Flow switch relay, Electronic Water Flow Switch, Relay Flow Switch . Through our continuous efforts and the long-term support of our customers, we have now become a large-scale and fast-developing enterprise in the Flow switch relay industry. We sincerely look forward to establishing long-term partnerships with customers and friends at home and abroad to create brilliant tomorrow! Our company values transparency and honesty in all our business practices. Our commitment to social responsibility and sustainability drives us to make a positive impact on the communities where we operate and the environment we live in. Our company has a robust quality assurance process that ensures product reliability and safety. We attach great importance to employee career planning and talent training projects. Surpassing ourselves, chasing excellence, bravely creating first-class, and always reaching new heights is our corporate culture. Our logistics network is extensive and reliable, ensuring that our products are delivered to customers quickly and efficiently.
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Relay output model. Drives contactors, solenoid valves, and alarm lamps directly – no intermediate relay needed. 8 LEDs show flow trend at a glance: 3 red + 1 yellow + 4 green. -
HNF40-B Intelligent Industrial Vortex Flow Meter uses the Karman vortex principle to accurately measure the flow of steam, gas, and liquids. By detecting vortex frequency
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The HNF00-A clamp-on ultrasonic flow meter uses a time-of-flight method for detection, allowing liquid flow monitoring without disconnecting the pipe from the medium. It solves
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Maximum Measurement Error: Flow ±1%, linearity ±0.5%; Heat ±2%; P3 accuracy calibrated to ±0.5% as per customer requirementsMeasurement Rate: 0~±10m/sMedium temperature
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HNF60 Electromagnetic FlowmeterFaraday’s law based, for conductive liquids (>5 μS/cm). DN10‑DN2600, accuracy ≤±0.25% FS, response <40 ms. No moving parts, zero pressure drop.
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HNF80-A thermal mass gas flowmeter measures flow via constant-temperature differential method. A heated NTC sensor in the flow path loses heat to passing gas; the resistance
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HNF90 Coriolis mass flowmeter. Direct mass flow measurement. No pressure/temperature compensation needed. One sensor outputs mass flow, density, and temperature
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Replaces paddle-type flow switches.No moving parts. Detects flow/no-flow in pipes DN15–DN350. NPN/PNP output. IP67.
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HNF10-AC Thermal flow switchField-adjustable setpoint via potentiometer. PNP / NPN / relay output selectable. Water, oil, or air. No moving parts. IP67.
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HNF10-B Electronic Flow Switch8 LEDs show flow trend at a glance. 3 red + 1 yellow + 4 green – you see immediately if flow is below, at, or above setpoint. Set via induction
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HNF10-D Piston Flow SwitchMechanical in-line flow switch. Piston + reed switch – no electronics, no field calibration. Setpoint factory-set, scale indicated on housing. Media:
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HNF10-E Baffle Flow SwitchMechanical flow switch. Spring-loaded baffle triggers microswitch when flow reaches setpoint. SPDT output – 3A at 250VAC – drives pumps, contactors,
Andrew Salinas
I was invited to visit your company a few years ago and was impressed by the warm working environment and the enthusiasm of your company and we hope that this cooperation will be a win-win situation
John Schuster
As a "quality first, customer first" company, they did exactly what they called for it.
Helen Page
Good seller, I will continue to support!
Mark Cooksey
The business process of this company is very standardized, and when encountering problems, they will not shirk the blame at all, no matter who will patiently help us solve the problem.
Angela Holt
The product quality is very good, I wish you better and better!
John Hong
The quality of their products is very stable because they are processed through first-class automated production lines, so we also have full trust in them.
Our company adopts the core values of being "people-oriented, serving the society" and the service concept of "customer-centric", aiming to build a first-class international enterprise and become a leading enterprise in the industry of crude oil flow meter, Non contact Ultrasonic Liquid Level Transmitter, Capillary Differential Pressure Transmitter . Hongnuo (shenyang) General Machinery Co., Ltd. is one of the most experienced flow switch relay manufacturers and suppliers in China, also supports customized service. Please feel free to buy high quality flow switch relay at competitive price from our factory.