Description
Small flow meter with pulse output, perfect for coffee machines. It works in 35–90% humidity and 0~80°C, with a voltage range of 3.5~24V. High pulse>4.5V, low<0.5V. Great for water dispensers, purifiers, vending systems, and pharmaceutical equipment.
Specification
| Model | ATO-YF-TM02 |
| Flow Range | 0.05~1 L/min ±3%; 0.3~4 L/min ±3% |
| Pressure Resistance | ≤0.8 MPa |
| Operating Voltage Range | DC 3.5~24V |
| Max Operating Current | 15mA (at DC 5V) |
| Insulation Resistance | >100 MΩ |
| Load Capacity | ≤10 mA (at DC 5V) |
| Operating Humidity Range | 35%–90% RH (non-condensing) |
| Operating Temperature Range | 0~80°C |
| Output Pulse High Level | >DC 4.5V (input voltage: DC 5V) |
| Output Pulse Low Level | |
| Pulse Characteristics | Inner diameter 1.2mm(Hz)= [86×Q] ±2%, approx. 5160 pulses per liter |
| Inner diameter 2.5mm(Hz)= [43×Q] ±2%, approx. 2580 pulses per liter |
Features
- Durable Material: Made of high-wear-resistant POM material for long service life in daily use.
- High Precision: Flow meter sensor is equipped with higher quality sensing components, offering high measurement accuracy and excellent stability.
- Compact & Easy to Install: Small, lightweight design makes installation simple and user-friendly, even in tight spaces.
- Reliable Waterproof Design: Internal electronics are protected with potting glue sealing, preventing water intrusion and aging.
- Ideal for Coffee Machines: Small water flow sensor designed for small household appliances like coffee makers, ensuring accurate water control for consistent brewing results.
Dimension (unit: mm)
Wiring Diagram
Flow Pulse Reference Chart
Table 1: Water inlet 1.2mm: 0.05~1L/min
| Flow Rate (L/min) | Pulse (Hz) | Error (±) | Min Value | Max Value |
| 0.05 | 4.3 | ±1.03 | 4.2 | 4.4 |
| 0.1 | 8.6 | ±1.03 | 8.3 | 8.9 |
| 0.15 | 12.9 | ±1.03 | 12.5 | 13.3 |
| 0.2 | 17.2 | ±1.03 | 16.7 | 17.7 |
| 0.25 | 21.5 | ±1.03 | 20.9 | 22.1 |
| 0.3 | 25.8 | ±1.03 | 25 | 26.6 |
| 0.35 | 30.1 | ±1.03 | 29.2 | 31 |
| 0.4 | 34.4 | ±1.03 | 33.4 | 35.4 |
| 0.45 | 38.7 | ±1.03 | 37.5 | 39.9 |
| 0.5 | 43 | ±1.03 | 41.7 | 44.3 |
| 0.55 | 47.3 | ±1.03 | 45.9 | 48.7 |
| 0.6 | 51.6 | ±1.03 | 50.1 | 53.1 |
| 0.65 | 55.9 | ±1.03 | 54.2 | 57.6 |
| 0.7 | 60.2 | ±1.03 | 58.4 | 62 |
| 0.75 | 64.5 | ±1.03 | 62.6 | 66.4 |
| 0.8 | 68.8 | ±1.03 | 66.7 | 70.9 |
| 0.85 | 73.1 | ±1.03 | 70.9 | 75.3 |
| 0.9 | 77.4 | ±1.03 | 75.1 | 79.7 |
| 0.95 | 81.7 | ±1.03 | 79.2 | 84.2 |
| 1 | 86 | ±1.03 | 83.4 | 88.6 |
Table 2: Water inlet 2.5mm: 0.3~4L/min
| Flow Rate (L/min) | Pulse (Hz) | Error (±) | Min Value | Max Value |
| 0.2 | 8.6 | ±1.02 | 8.4 | 8.8 |
| 0.3 | 12.9 | ±1.02 | 12.6 | 13.2 |
| 0.4 | 17.2 | ±1.02 | 16.9 | 17.5 |
| 0.5 | 21.5 | ±1.02 | 21.1 | 21.9 |
| 0.6 | 25.8 | ±1.02 | 25.3 | 26.3 |
| 0.7 | 30.1 | ±1.02 | 29.5 | 30.7 |
| 0.8 | 34.4 | ±1.02 | 33.7 | 35.1 |
| 0.9 | 38.7 | ±1.02 | 37.9 | 39.5 |
| 1 | 43 | ±1.02 | 42 | 44 |
| 1.1 | 47.3 | ±1.02 | 46.2 | 48.4 |
| 1.2 | 51.6 | ±1.02 | 50.6 | 52.6 |
| 1.3 | 55.9 | ±1.02 | 54.8 | 57 |
| 1.4 | 60.2 | ±1.02 | 59 | 61.4 |
| 1.5 | 64.5 | ±1.02 | 63.2 | 65.8 |
| 1.6 | 68.8 | ±1.02 | 67.4 | 70.2 |
| 1.7 | 73.1 | ±1.02 | 71.6 | 74.6 |
| 1.8 | 77.4 | ±1.02 | 75.9 | 78.9 |
| 1.9 | 81.7 | ±1.02 | 80.1 | 83.3 |
| 2 | 86 | ±1.02 | 84.3 | 87.7 |
| 2.1 | 90.3 | ±1.02 | 88.5 | 92.1 |
| 2.2 | 94.6 | ±1.02 | 92.7 | 96.5 |
| 2.3 | 98.9 | ±1.02 | 96.9 | 100.9 |
| 2.4 | 103.2 | ±1.02 | 101.1 | 105.3 |
| 2.5 | 107.5 | ±1.02 | 105.4 | 109.6 |
| 2.6 | 111.8 | ±1.02 | 109.6 | 114 |
| 2.7 | 116.1 | ±1.02 | 113.8 | 118.4 |
| 2.8 | 120.4 | ±1.02 | 118 | 122.8 |
| 2.9 | 124.7 | ±1.02 | 122.2 | 127.2 |
| 3 | 129 | ±1.02 | 126.4 | 131.6 |
| 3.1 | 133.3 | ±1.02 | 130.6 | 136 |
| 3.2 | 137.6 | ±1.02 | 134.8 | 140.4 |
| 3.3 | 297 | ±1.02 | 291.1 | 302.9 |
Application
Tips: How Does Small Flow Sensor Work in Coffee Machine?
Small water flow sensor measures the amount of water flowing through the coffee machine using a magnetic rotor and a Hall element. As water passes through the sensor, the rotor spins and generates pulse signals. These pulses are sent to the coffee machine’s control board, which calculates the exact water volume—ensuring accurate brewing every time.
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