3/8" Digital Flow Switch for Air

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$234.99

High sensitive digital flow switch for air with 3/8 inch thread port size, measuring air and Nitrogen (N2), operating fluid temperature range from 0 to 50℃, selectable PNP or NPN signal output. This air flow switch comes with sensor for flow sensing to transmit data to the mainboard.

Rated Flow Range *
Signal Output *

SKU: ATO-FLOW-38

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Overview

Factory price air flow switch with digital display can monitor data in real time. It is designed with high sensitive sensor, PNP or NPN signal output for transmitting data to the mainboard.

Specification

Model		ATO-NPF2A711-03	ATO-NPF2A721-03
Port Size Rc (PT)		3/8 inch
Measured Fluid		Air, Nitrogen (N2)
Rated Flow Range		10~100L/min	20~200L/min
Minimum Set Unit		1L/min	2L/min
Accumulated Pulse Flow Rate Exchange Value (Pulse Width: 50 ms)		1L/pulse	2L/pulse
Display Units	Instantaneous Flow Rate	L/min, CFMx10^-1
	Accumulated flow	L, ft³ x10^-1
Operating Pressure Range		-50KPa~0.75KPa
Operating Fluid Temperature		0~50℃
Power Supply Voltage		DC12~24V±10%
Current Consumption		160mA or less
Accumulated Flow Range		0~999999L
Detection Type		Heater type
Accuracy		±5% F.S.
Repeatability		±2% F.S.
Temperature Characteristics		±3% F.S. (15 to 35°C, 25°C reference), ±5% F.S. (0 to 50°C, 25°C reference)
Output	Switch Output	NPN open collector maximum load current: 80 mA Internal voltage drop: 1 V or less. Maximum applied voltage: 30 V, 2 outputs
	Accumulated Pulse Output	NPN or PNP open collector (same as switch output)
Hysteresis		Hysteresis mode: Variable (can be set from 0) Window comparator mode: 3-digit fixed
Response Time		Lights up when output is turned ON OUT1: Green OUT2: Red
Status LED’s		1 sec. or less
Environment	Enclosure	IP65
	Operating Temperature Range	Operating: 0 to 50°C Stored: –25 to 85°C (with no freezing and condensation)
	Withstand Voltage	1000 VAC for 1 minute between terminals and housing
	Insulation Resistance	50 mΩ or more (500 VDC measured via megohmmeter) between terminals and housing
Noise Resistance		1000V P-P Pulse width 1μ s, duration 1 ns
Wire Size		M12 connector (3m)
Weight		1kg

Flow Rate Diagram

Voltage Output: A: 1V, B 5V
Current Output: A: 4mA, B 20mA

Flow rate diagram of digital flow switch

Pin Number & Wire Color

Wire color of digital flow switch

Pin Number	Content	Wire Color
1	DC (+)	Brown
2	OUT2	White
3	DC (-)	Blue
4	OUT1	Black

Dimensions (Unit: mm)

Dimensions of digital flow switch

Details

Tips: What is an air flow switch used for?

Air flow switches can be used in air filtration and supply systems, duct heating, exhaust ventilation, and more. Air flow switches are found in a wide variety of duct and HVAC systems, often using paddle operation to trigger a micro switch when the flow increases or decreases beyond a set rate or volume. In HVAC and ductwork, many air flow switches can also be used to perform operations such as air handling, fan monitoring, and filter monitoring.

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