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MKAM type water signal

Flow switch
It detects the fluid flow and switches the device ON or OFF at the specified flow rate.
*The switch is fixed (the setting value cannot be changed later). The movement of the float visualizes the flow.
Lightweight aluminum protective cover
The use of a cast aluminum protective cover achieves both durability and lightweight design.
The mounting direction does not matter.
Because it uses a spring inside, you can freely choose the mounting position, such as upward, downward, or sideways.
Model 
 Dimensions (mm)[[Due to the casting surface, there may be individual variations in the overall width.]
Flow rate (L/min)
 Connection port diameter
Length 
Width 
Depth 
Minimum inner diameter
φmm
Operating flow rate specified range
maximum
MKAM20-1TW-OFF
 Rc1/8 
80
30
22
6.5
 0.1 to 4
10
MKAM20-1TW-ON
MKAM20-2TW-OFF
Rc1/4
80
30
22
6.5
 0.1 to 4
10
MKAM20-2TW-ON
MKAM20-3TW-OFF
Rc3/8
86
30
25
6.5
 0.1 to 4
10
MKAM20-3TW-ON
MKAM30-2TW-OFF
Rc1/4
100
44
32
9.5
 0.5 to 10
20
MKAM30-2TW-ON
MKAM30-3TW-OFF
Rc3/8
104
44
32
9.5
 0.5 to 10
20
MKAM30-3TW-ON
MKAM30-4TW-OFF
Rc1/2
110
44
32
9.5
 0.5 to 10
20
MKAM30-4TW-ON
MKAM35-4TW-OFF
Rc1/2
124
49
44
 13.5
3 to 15
50
MKAM35-4TW-ON
MKAM35-6TW-OFF
Rc3/4
124
49
44
 13.5
3 to 15
50
MKAM35-6TW-ON
MKAM45-6TW-OFF
Rc3/4
142
62
50
18.0
5 to 30
100
MKAM45-6TW-ON
MKAM45-8TW-OFF
Rc1
142
62
50
18.0
5 to 30
100
MKAM45-8TW-ON
When ordering or requesting a quote□Please specify your choice.
 
Model
MKAM□□-□TW-OFF(ON)
Switch operating flow rate
□L / min
Example: MKAM20-2TW-OFF switch operating flow rate 1L/min
 *Please specify whether you want the 'OFF' or 'ON' contact method.
'OFF type'... The contact turns OFF when the flow rate decreases (normally open/A contact).
  'ON type'... The contact turns ON when the flow rate decreases (normally closed/B contact).

Standard specifications

Fluid
Wed
 Working flow rate
Please specify a flow rate value within the specified range of the operating flow rate as described above.
Connection
Rc female thread 
Change to R male thread
It can also be used in combination with an R-type male thread. 
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Maximum 60℃
Heat-resistant versions (up to 100°C) are also available.
pressure resistance
1MPa
Pressure-resistant versions (up to 5 MPa) are also available.
 Maximum operating voltage
DC, AC 300V  
Maximum operating current
DC, AC 0.5A  
 Contact capacity
50VA  
Material
transparent tube
Acrylic
Heat-resistant and pressure-resistant versions are made of brass tubing (C3604).
The floats in heat-resistant and pressure-resistant products cannot be visually inspected.
Protective covers
Cast aluminum
For the bronze version, please choose the MKCM model.
Fitting
C3604 (brass)
We can also manufacture them in stainless steel (SUS).
Spring
SUS304
-
Includes magnet
Float
Acrylic or
Nylon
-
 O-ring
Nitrile rubber
The heat-resistant and pressure-resistant version uses fluororubber.
 Reed switch
Commercial goods 
-
Lead Wire
(Standard product 200mm)
Commercial goods 
Specify the length of the lead wires.
It is also possible to change to a cabtyre cord.

Precautions for using the flow switch

1. Precautions regarding the effects of magnetism

●Since reed switches are switches that operate using magnetism, please use them in a location where they will not be affected by magnetic fields.
●The presence of magnetic materials such as iron near the reed switch can cause malfunctions. 

2. Precautions regarding electrical wiring

● The flow switch is designed to prevent overcurrent from flowing to the reed switch due to faulty grounding or other reasons.
Please pay attention to the wiring.
●Flow switches should be used as alarm detectors whenever possible.
When using this device in conjunction with other electrical equipment, please handle it with due consideration to the potential impact of any malfunctions. 
● Keeping the operating voltage and current as low as possible will extend the lifespan of the reed switch.
(Under normal conditions of 100V 0.5A, it can be used for approximately 1,000,000 switch operations)
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