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Sensors/Switches
ANPF2A7 Series Digital Type Flow Switch
Product Overview
The ANPF2A7 Series Digital Flow Switch is a high-accuracy electronic flow monitoring solution designed for industrial liquid applications. It supports real-time flow detection, flow setting, and output control, making it ideal for automation systems, water treatment equipment, and cooling circuits.
With a repeatability of ±2% and adjustable flow thresholds ranging from 0.1 to 50 L/min, the ANPF2A7 series ensures stable and precise flow monitoring. The integrated digital display allows users to monitor instantaneous flow rate or accumulated flow volume clearly.
To meet diverse system requirements, this digital flow switch offers NPN/PNP open-collector outputs as well as analog outputs (4–20 mA / 0–10 V), enabling seamless integration with PLCs, controllers, and industrial control systems. Both integrated and separated sensor/display designs are available for flexible installation.
Technical Parameters
| Model | ANPF2A710 | ANPF2A750 | ANPF2A711 | ANPF2A721 | ANPF2A751 | ||
| Connector CaliberRc(PT) | 1/8 | 1/4 | 3/8 | 3/8 | 1/2 | ||
| Using Fluid | Air N₂ | ||||||
| Rated Flow Range(L/Min) | 1~10 | 5~50 | 10~100 | 20~200 | 50~500 | ||
| Minimum Setting Unit(L/Min) | 0.1 | 0.5 | 1 | 2 | 5 | ||
| Flow Conversion Value Of Cumulative Pulse(Pulse Width50Ms) | 0.1L/1Pulse | 0.5L/1Pulse | 1L/1Pulse | 2L/1Pulse | 5L/1Pulse | ||
| Display Unit | Instantaneous Flow | L/Min, CFM X 10² | L/Min, CFMx10 | ||||
| Cumulative Traffic | L,F³×10' | ||||||
| Operating Pressure Range | -50 KPa ~ 0.5 MPa | -50 KPa ~ 0.75 MPa | |||||
| Use Fluid Temperature | 0~50℃ | ||||||
| Power Supply Voltage | DC 24V±10% | ||||||
| Consume Current(No Load) | 150MAthe Following | 160MAthe Following | 170MAthe Following | ||||
| Cumulative Traffic Range | 0~999999L | ||||||
| Detection Method | Hot | ||||||
| Accuracy | ±5%Below Full Scale | ||||||
| Repeatability | ±1%Below Full Scale | ±2%Below Full Scale | |||||
| Temperature Characteristics(By25℃ As The Standard) | ±3%Below Full Scale(15~35℃±5%Below Full Scale(0~50℃) | ||||||
| Output Specifications(Note1) | Switch Output | NPNMaximum Open Collector Load Current80MAInternal Voltage1VThe Following Maximum Applied Voltage30V,2Output | |||||
| Cumulative Pulse Output | NPNOpen Collector(Same As Switch Output) | ||||||
| Hysteresis | Hysteresis Mode: Variable(Available From0Set Up )Upper And Lower Limit Comparison Mode (Note 2): Fixed(3 Digits) | ||||||
| Response Time | 1Sthe Following | ||||||
| Action Indicator Light | ONThe Light Is On OUT1:Green OUT2:Red | ||||||
| Environmental Resistance | Protective Structure | IP65 | |||||
| Operating Temperature Range | During The Action:0~50℃When Saving:-25~85℃(But No Dew Formed.) | ||||||
| Withstand Voltage | Between External Terminals And Housing AC1000V1Minute | ||||||
| Insulation Resistance | Between External Terminals And Housing 50MΩAbove | ||||||
| Noise Resistant | 1000V PPPulse Width1μScontinued1Ns | ||||||
| Wire Specifications | M12Connector(3M) | ||||||
| Note 1) Switch Output And Cumulative Pulse Output Are Selected During Initial Settings. Note 2) The Hysteresis Of The Upper And Lower Limit Comparison Mode Is 3 Digits, So The Difference Between P1, P2 Or N1, N2 Must Be Greater Than 7 Values (1 Value Is The Minimum Setting Unit). Note 3) PNP Switch Output Is Also Available; Please Contact Our Company. |
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Optional/Part model
| If optional units are required, please order according to the following models. | |||
| Model | Contents | Notes: | Weight |
| ZS-37-A | Wire with plug (straight-through type) | Length: 3m | 100g |
| ZS-37-B | Wire with plug (L-type) | Length: 3m | 100g |
| ZS-29-T | Bracket | Includes 4 mounting screws (3x12 threaded) | 40g |
Analog output characteristics
| A | B | |
| Voltage output | 1V | 5V |
| Current output | 4mA | 20mA |
| Type | Rated flow rate |  |
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| Min | Max | |||||
| ANPF2A710 | 1 L/min | 10 L/min | ||||
| 3.5 CFM×10-2 | 35.0 CFM×10-2 | |||||
| ANPF2A750 | 5 L/min | 50 L/min | ||||
| 18 CFM×10-2 | 176 CFM×10-2 | |||||
| ANPF2A711 | 10 L/min | 100 L/min | ||||
| 3.5 CFM×10-1 | 35.5 CFM×10-1 | |||||
| ANPF2A721 | 20 L/min | 200 L/min | ||||
| 7 CFM×10-1 | 71 CFM×10-1 | |||||
| ANPF2A751 | 50 L/min | 500 L/min | ||||
| 18 CFM×10-1 | 176 CFM×10-1 | |||||
| ※:The analog output is based on the rated flow range under reference conditions. The displayed flow range is based on the standard conditions. Therefore, the rated flow range and the displayed flow range are different. Furthermore, the analog output value will change when switching between reference and standard conditions. When using the analog output under standard conditions, please use the following formula for conversion: Reference condition flow value ÷ 0.927 = Standard condition flow value |
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Application Spotlight
The ANPF2A7 Series Digital Flow Switch is widely used in the following applications:
・Industrial Automation Systems: Flow monitoring and protection in automated production lines and equipment
・Water Treatment & Filtration Systems: Monitoring water flow in purification, circulation, and dosing systems
・Cooling & Chiller Systems: Flow detection for cooling water, coolant circulation, and heat exchangers
・Machine Tools & CNC Equipment: Ensuring stable coolant flow to protect tools and improve machining accuracy
・Energy & Utility Equipment: Flow supervision in pumping systems and liquid distribution networks
・OEM Equipment Integration: Ideal for OEM manufacturers requiring reliable digital flow monitoring solutions
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What is the difference between integrated and separated types?
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How does the ANPF2A7 help protect equipment?
By detecting abnormal flow conditions and providing switch or analog signals, the ANPF2A7 helps prevent dry running, overheating, and system failure, improving equipment safety and lifespan.