Water Heater Flow Sensor, 1~30 L/min

SKU: SUCH-WFS-FS200A
$61.47
● 1~30 L/min (±3%) ● G1/2'' interface ● Pulse output ● PPS material
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🕒 Delivery date: 6-12 days
🔁 30-day Returns
Overview

High-voltage-resistant water heater flow sensors for sale. With a G1/2'' standard interface design, the flow range covers 1~30 L/min, achieving measurement accuracy up to ±3% for precise detection of water usage status. This water flow sensor features a high-stability pulse output design internally, where pulse frequency is proportional to flow rate at approximately 486 pulses per liter. It is widely compatible with instantaneous, electric storage, and gas water heater systems.

Feature

Water heater flow sensor feature

  • Wide Flow Range: The water heater flow sensor supports measurement across a broad range of 1–30 L/min with accuracy up to ±3%, precisely adapting to flow variations in both residential and commercial water heaters under diverse usage scenarios.
  • High-Sensitivity Pulse Output: Utilizing a pulse output method, the frequency exhibits a linear relationship with flow rate. The output characteristic is F = 8.1 × Q, approximately 486 pulses per liter, delivering stable and consistent signals.
  • Wide Voltage Supply: Supports DC 3.5–24 V input with a rated operating voltage of DC 5 V. Maximum operating current is only 15 mA, ensuring low power consumption and minimal heat generation.
  • High-Temperature Resistant Material: Designed for long-term operation in water heater environments, the sensor is constructed from high-performance PPS material, offering excellent heat resistance and mechanical strength.

Dimension (unit: mm)

Water heater flow sensor dimension

Wiring Diagram

Water heater flow sensor wiring diagram

Specs
Interface Dimensions G1/2''
Flow Range 1~30 L/min (±3%)
Inner Diameter / Outer Diameter 10 mm / 20.4 mm
Thread Length 11 mm
Pulse Characteristics (Hz) = [8.1 × Q] ± 3%, approx. 486 pulses/liter
Operating Voltage DC 3.5–24 V
Pressure Rating Range ≤ 1.75 MPa
Rated Operating Voltage DC 5 V
Maximum Operating Current 15 mA (DC 5 V)
Operating Voltage Range DC 3.5–24 V
Applicable Ambient Water Temperature 0–100 °C (non-condensing)
Applicable Humidity Range 35%–90% RH (non-condensing)
Allowable Water Pressure ≤ 1.75 MPa
Material PPS
Application

Irrigation water flow sensor for gas water heater

Gas Water Heater

Wall-mounted dual-purpose boiler

Wall-mounted Dual-purpose Boiler

Water flow sensor for water heater

Water Heater

FAQ

The water heater flow sensor primarily detects the presence of water flow and measures its real-time volume. When flow reaches the activation threshold, the system permits heating or ignition. Should flow cease or drop too low, the water heater automatically halts heating to prevent dry firing, thereby enhancing overall safety and operational reliability.

Under normal conditions, no. The internal flow path of the water heater flow sensor is optimized to minimize pressure loss within the rated flow range, causing no significant reduction in water pressure. As long as the selected model matches the pipe diameter and flow range, the water delivery experience remains largely unaffected.

When selecting a model, focus on interface dimensions, flow range, output signal type, and operating voltage to ensure compatibility with the water heater control system. Additionally, choose models with reliable temperature and pressure resistance to guarantee long-term stable operation.

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