RoHS PNP IP67 24VDC Digital Flow Switch

Place of Origin China
Brand Name Sier
Certification CE,RoHS
Model Number SPK81
Minimum Order Quantity 1
Price USD120/Piece
Packaging Details Carton
Delivery Time 7
Payment Terms T/T, Western Union
Supply Ability 5000 pieces each month
Product Details
Housing S.S. Button PP
Probe S.S. Gross Weight 265g
Electric Connection M12×1 5-pin Plug Endurance Pressure 10MPa
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PNP pressure transmitter switch


IP67 24VDC Digital Flow Switch

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Product Description

RoHS PNP IP67 24VDC Digital Flow Switch 0

SPK81 Flow Switch


FeaturesRoHS PNP IP67 24VDC Digital Flow Switch 1

· Optional power supply 24VDC or 220VAC

·OLED LCD screen, switchable display between the progress bar and digital display

· All stainless steel housing, IP67 protection

· Temperature compensation

· 2-way PNP ¦ 2-way NPN ¦ 1 relay output are optional

· No moving parts, maintenance-free

· Switch output, control point setting continuously on panel

· Compact size, support inverted display

· Mounting joint can be equipped with different interfaces for a variety of pipe diameters requirement



SPK81 flow switch is an intelligent thermal diffusion principle-based flow monitoring sensor. It adopts ARM processing core and combines with high quality sensors and dedicated circuit. With temperature-compensation and calibration, it can ensure measurement accuracy in the case of water temperature change. It is available for real-time monitoring of pipe water flow. It can be used for cooling or lubrication system flow monitoring to realize pre-warning and protection for critical equipment when there is flow fault. It uses fully enclosed design, stainless steel construction to adapt to a variety of application environment. It is with overvoltage, overcurrent and reverse polarity protection function. With self-luminous OLED screen, it allows switchable display between the progress bar and digital display numbers. SPK81 supports quick action point set, also it has display inversion function that enables installation in any direction, and no need for frequent adjustment and maintenance. It can be applied for operation protection of large equipment in fileds such as power generation, metallurgy, steel, paper, boilers etc.



Measure Range 1cm/s~150cm/s (water)
Optimal Range 3cm/s~100cm/s (water)
Power Supply (220±44)V AC; (24±4.8)V DC
Working Current ≤ 60mA
Switch accuracy ±10cm/s
Hysteresis ±2cm/s~±8cm/s
Initial time 2s~15s,8s(typ.)
Switch Current ≤ 400mA
Switch-off Time 1s~15s,2s(typ.)
Output signal 1 relay¦2-way PNP¦2-way NPN (optional)
Output Function NO,NC (optional) Relay
Characters Switch voltage: ≤ 250V AC / 30V DC
Switch Current: ≤3A; Transistors

Switch Voltage Drop:≤ 1.5V
Switch Current: ≤ 400mA
Switch-on time 1s~13s,2s(typ.)
Display OLED indicator,resolution 128×32
Electric Protection Reverse, short-circuit, over-voltage
Housing S.S.
Button PP
Probe S.S.
Installation Joint mounting + adaptor
Endurance Pressure 10MPa
Set Button
Electric Connection M12×1 5-pin plug
Gross weight 265g
Water Temp. -20℃~80℃
Storage Temp. -30℃~85℃
Working Temp. -20℃~70℃
Protection IP67
Temperature Compensation 5℃~50℃(water)
Electromagnetic Compatibility GB/T 17626.2/3-2006, GB/T 17626.4-2008
Shock: ≤ 20g (GB/T 2423.10-2008)
Impact:≤ 50g/11ms (GB/T 2423.5-1995)

Note: The above specification test medium is water; 5cm/s~100cm/s;20℃(Factory defaults)



RoHS PNP IP67 24VDC Digital Flow Switch 2

RoHS PNP IP67 24VDC Digital Flow Switch 3

RoHS PNP IP67 24VDC Digital Flow Switch 4

Order Guide

RoHS PNP IP67 24VDC Digital Flow Switch 5


         Optional accessories: SP901 2m 5-pin M12×1 Female Elbow RVVP Cable(Standard)

                                             SP601 M20×1.5 male adaptor

                                             SP602 G1/2 male adaptor



1. Pressure port can be customized for users. Please note in the purchase order.
2. If users have special requirement, please contact us freely.