Hall Effect Flow Sensor For Coffee Machine

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$9.90

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Stock: In Stock
Model: RDDLZ-FLOW-HE
Weight: 1.00
SKU: RDDLZ-FLOW-HE

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Hall effect flow sensor 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	RDDLZ-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

Feature

Durable Material: Made of high-wear-resistant POM material for long service life in daily use.
High Precision: 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: Hall effect 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: What does a Hall effect flow sensor do in a coffee machine?

A Hall effect 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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