Digital Flow Switch for Water Size 3/4″

Digital Flow Switch for Water Size 3/4″ with digital display for real-time monitoring, ±2% accuracy, measuring water and ethylene glycol aqueous solution, fluid temperature 0~90℃. This water flow switch comes with a water sensor, which is designed for flow sensing to transmit data to the mainboard, Selectable signal output PNP or NPN.

Overview Digital Flow Switch for Water Size 3/4″

A lightweight water flow switch with a digital display can monitor data in real-time. It is designed with a water sensor, PNP, or NPN signal output for transmitting data to the mainboard.

Digital Flow Switch for Water Size 3/4"
Digital Flow Switch for Water Size 3/4″

What are the functions of water flow switches?

  • Detect whether the liquid in the pipeline flows and whether the flow meets the requirements, and at the same time, the on-off state of a signal is provided by the switch electrical contact.
  • The equipment system judges the working status of the pipeline system by detecting whether there is a signal or control current passing through this switch, and gives the corresponding control or operation mode or measures.
  • It is used to detect the flow of liquid in the water circulation pipe network system of the central air conditioner, the automatic sprinkler fire extinguishing system of the fire protection system, and a certain type of liquid circulation cooling system pipeline.

The Specifications of Digital Flow Switch for Water Size 3/4″

Model ATO-NPF3W74006
Port Size Rc (PT) 3/4 inch
Applicable Fluid Water, Ethylene glycol aqueous solution (with viscosity of 3 MPa·s [3 cP] or less)
Detection Method Karman vortex
Rated Flow Range 5~40L/min
Display Flow Range 3.5~55.0L/min
Set Flow Range 3.5~55.0L/min
Smallest Settable Increment 0.1L/min
Conversion of Accumulated Pulse 0.05L/pulse
Fluid Temperature 0 to 90°C (No freezing or condensation)
Display Unit Instantaneous flow: L/min, Accumulated Flow: L
Accuracy Display value: ±3% F.S. Analog output: ±3% F.S.
Repeatability ±2% F.S
Temperature Characteristics ±5% F.S. (25°C standard)
Operating Pressure Range 0~1MPa
Proof Pressure 45kPa or less at the maximum flow
Accumulated Flow Range 99999999.9L
By 1L
Switch Output / NPN or PNP
Max. Load Current 80mA
Max. Applied Voltage DC28V
Internal Voltage Drop NPN: 1 V or less (at load current of 80 mA)
PNP: 1.5 V or less (at load current of 80 mA)
Response Time 0.5s/ 1s/ 2s
Output Protection Short-circuit protection
Analog Output Voltage Output Voltage output: 1 to 5 V Output impedance: 1 kΩ
Current Output Output current: 4 to 20 mA
Max. load impedance: 300 Ω for 12 VDC, 600 Ω for 24 VDC
Response Time 0.5s/ 1s/ 2s (linked with the switch output)
Hysteresis Variable
External Input Voltage free input: 0.4 V or less (Reed or Solid state), input for 30ms or longer
Display Method 2-screen display (Main screen: 4-digit, 7-segment, 2-color, Red/Green Sub screen: 6-digit, 11-segment, White)
Display values updated 5 times per second
Indicator Light Output 1, Output 2: Orange
Power Supply Voltage DC12~24V±10%
Current Consumption Below 50mA
Environment Enclosure IP65
Operating Temperature Range 0 to 50°C (No freezing or condensation)
Operating Humidity Range Operation, storage: 35 to 85% R.H. (No 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
Standards and Regulations CE, UL(CSA), RoHS
Wetted Parts Material PPS. SUS304. FKM. SCS13, Non-grease
Weight 1kg

Flow Rate Diagram

  • Voltage Output: A: 1V, B: 1.5V, C: 5V
  • Current Output: A: 4mA, B: 6mA, C: 20mA
Digital Flow Switch for Water Size 3/4" - Flow Rate Diagram
Flow Rate Diagram

Pin Number & Wire Color

Digital Flow Switch for Water Size 3/4" - Pin Number and Wire Colour
Pin Number and Wire Colour
Pin Number Content Wire Color
1 DC (+) Brown
2 OUT2 White
3 DC (-) Blue
4 OUT1 Black

Body Dimensions (Unit: mm)

Digital Flow Switch for Water Size 3/4" - Body Dimension
Body Dimension

Basic Dimension

A AA B D E F G H J K L N P
98 71 38 68 48.6 19.2 32 28 49 35 28 16.8 φ2.7 deep 12

Bracket Dimension

S T U V W WX Y Z
34 30 42 48 58 4.5 5 1.5

M8 Lead Wire Dimensions (Unit: mm)

Digital Flow Switch for Water Size 3/4"
M8 Lead Wire Dimensions

Details

Digital Flow Switch for Water Size 3/4"
Details

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author

Rudy Wiratama

rudywinoto.com/wmablog.com/flowmasonic.com

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