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Small Flow Sensor for Coffee Machine, 3.5-24V DC

5 out of 5 based on 1 reviews | Write a review

$34.98

Good price small flow sensor with pulse output for sale. Coffee machine sensor works in 35%~90% RH (non-condensing) and 0~80°C, with output pulse high level more than DC 4.5V and low level less than DC 0.5V. Its voltage range is 3.5~24V. Widely used in water dispensers, water purifiers, water sales systems, pharmaceutical preparation machinery.

Flow Range *

SKU: ATO-FLOW-HE

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Delivery date: 6-12 days

Overview

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	<DC 0.5V (input voltage: DC 5V)
Pulse Characteristics	Inner diameter 1.2mm(Hz)= [86×Q] ±2%, approx. 5160 pulses per liter
Pulse Characteristics	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)

Small floe sensor dimension

Wiring Diagram

Small floe sensor 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

Small floe sensor 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.

Existing reviews of Small Flow Sensor for Coffee Machine, 3.5-24V DC

Looking for a sensor

I have a cast-iron lid with a diameter of about 12 inches and would like to install a sensor or similar device to receive a notification whenever the lid is lifted—ideally, I’d like these notifications sent to my mobile phone.

From: Kenty | Date: 21/09/2026

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ATO Responded

Unfortunately, we do not currently offer a sensor capable of sending signals directly to a mobile phone.

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Small Flow Sensor for Coffee Machine, 3.5-24V DC

Specification

Features

Dimension (unit: mm)

Wiring Diagram

Flow Pulse Reference Chart

Application

Tips: How Does Small Flow Sensor Work in Coffee Machine?

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