I. Product Overview
The J16S is a flow sensor based on the turbine Hall effect principle, specifically designed for medium- and high-pressure water systems. Its core components are a brass valve body and an internal turbine. Water flow drives the turbine to rotate, and a Hall element senses and outputs a pulse frequency signal proportional to the flow rate. This product features high pressure resistance, a wide flow range, and stable pulse output characteristics, making it suitable for flow measurement and protection in water heaters, boilers, water treatment systems, and various industrial equipment.
II. Technical Specifications
| Project | Specifications |
| Interface thread | Inlet: 3/4″ NPT (American Standard Brass Thread) / Outlet: G1/2 (Cylindrical Pipe Thread) |
| Main material | brass |
| Leader definition | C3B-3P White plug 3×400mm (cable length can be customized)
Red: Positive power supply | Black: Negative power supply | Yellow: Signal output |
| Operating voltage | 5 – 24 VDC |
| Working flow range | 1 – 30 L/min |
| Pulse characteristics | F = 10 × Q ± 10%（Q = L/min） |
| Output pulse duty cycle | 50% ± 10% |
| Output high level (DC5V) | ＞ DC 4.6V |
| Output low level (DC5V) | ＜ DC 0.5V |
| Insulation resistance | ≥ 100 MΩ |
| Water pressure resistance | 1.5 MPa, pressure held for 10 seconds, no leakage. |
| Anti-backflow performance | When the water flow rate is 10 L/min at the outlet, the frequency is < 10 Hz. |
III. Frequency response parameter table (10×Q ± 10%)
Note: * indicates points that must be tested at the factory.
| Flow (L/min) | 1L* | 2L | 3L | 4L | 5L* | 6L | 7L | 8L | 9L | 10L |
| Reference frequency (Hz) | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 |
| -10% Frequency (Hz) | 9 | 18 | 27 | 36 | 45 | 54 | 63 | 72 | 81 | 90 |
| +10% Frequency (Hz) | 11 | 22 | 33 | 44 | 55 | 66 | 77 | 88 | 99 | 110 |
IV. Application Areas
- Gas/electric water heaters, wall-hung boilers
- Industrial boiler water circulation monitoring
- Central air conditioning water system
- Water treatment and environmental protection equipment
- Cooling and lubrication systems of general industrial machinery
V. Precautions and Selection Recommendations
- Installation requirements:It is recommended to reserve sufficient straight pipe sections before and after the flow meter to ensure stable water flow and measurement accuracy.
- Media requirements:Suitable for clean water or mildly corrosive liquids, but not suitable for media containing a large amount of impurities or with excessively high viscosity.
- Multifunctional:The valve body is designed with an NTC temperature sensor mounting hole. If water temperature needs to be monitored at the same time, a multifunctional version with a built-in NTC probe can be purchased.
