PRESSURE SWITCH（HW3）
The pressure switch operates when the pressure in the hydraulic circuit reaches the presetpressure, to control electric circuits of a solenoid valve, a motor starter switch, or a signal
indicating lamp, etc.

■Features
1. The pressure switch is designed for higher accuracy.
2. Compact and light weight design assures simple pressure adjustment and wiring work.
3. The switch operation status can be confirmed visually thanks to a neon lamp.
4. Since it can be connected to the manifold directly by a gasket, equipment size can bereduced.
5. Two types of subplate allow piping to the back or side face.
● Limit the hysteresis (pressure difference of ON-OFF) to no higher than 8% of maximum
permissible adjustment pressure in each pressure adjustment range.
● When a subplate SHW02-02T1 (piping to back) or SHW02-02T2 (piping to side) is
necessary, please order separately.
● When ordering a pressure switch, please specify the operating voltage in addition to themodel code.

■Description of the model designation

HW3ｰ1G0ｰ02（ｰDC）（K）（ｰL）●Symbols used in electric circuit+NC

C

Max. operating pressure
3: 21MPa

IRConstruction category

C : Common terminal

Piping method
G: Gasket type

NC : Normally closed contact

NO

L: With lamp (for DC only)(Lamp is installed on AC type.)
For light load
Voltage indication No code:AC
DC:DCNominal size
Pressure adjustment range
0: 0.35 to 2 MPa
1: 1.5 to 5.5 MPa
2: 5 to 9.5 MPa
3: 9 to 15.5 MPa
4: 15 to 21 MPa

Pressure switch

NO: Normally open contact
L : Contact for lamp

●Electric rating of micro switch
ACDC■Specifications

125Vｰ15A, 250Vｰ15A, 480Vｰ15A
125Vｰ0.5A, 250Vｰ0.25A

Nominal Max. operating Permissible back Pressure adjustment
range
pressurepressuresize
(MPa)
(MPa)
(MPa)

I02

210.03Model

HW3ｰ1G0ｰ02（ｰDC）（K）ｰ（L）

1.5 to 5.5

HW3ｰ1G1ｰ02（ｰDC）（K）ｰ（L）

5 to 9.5

HW3ｰ1G2ｰ02（ｰDC）（K）ｰ（L）

9 to 15.5

HW3ｰ1G3ｰ02（ｰDC）（K）ｰ（L）

15 to 21

HW3ｰ1G4ｰ02（ｰDC）（K）ｰ（L）■Outside dimensions

70

JISB 2401ーP1433

1530
102120224-M6 15 deep54

SHW02ｰ02T270

30
1612301021202272
22１３2ーRc1/4

4ーM6
Mass: 1.7㎏

I−2

2ーφ92-φ14 Counter bore depth 13315

Coverinstallation/removal
dimension

7107
125G（PF）
1/2
Cable inlet

30
122ーRc1/4722254
6872
8650

Neon Lamp
Window

2ーφ92-φ14 Counter bore depth 1872-φ3.5

JISB 2401ーP6

SHW02ｰ02T187
2−φ3.5

HW3ｰ1G*ｰ02（ｰDC）
（K）
（ｰL）

19

ANCILLARY EQUIPMENTS

0.35 to 2

4-M6 15 deep54

PRESSURE SWITCH（HW1）
The pressure switch operates when the pressure in the hydraulic circuit reaches the presetpressure, to control electric circuits of a solenoid valve, a motor starter switch, or a signal
indicating lamp, etc.

■Features
1. The pressure switch is designed to be compact and light.
2. The pressure switch can be installed easily since drain piping is not necessary.
3. The switch operating status (ON / OFF) can be confirmed through the operation checkwindow.

■Description of the model designation

HW１ｰ３T１ｰ０２ｰ（L）
With/without indicator lamp
No code: Without lamp
L: With AC indicator lamp
DC-L: With DC indicator lamp
Nominal size of valve
Pressure adjustment range0: 0.04 to 2 MPa
1: 1 to 7 MPa

Pressure switch
Max. operating pressure
1: 7 MPa
Construction category
Piping method
T: Rc thread■Specifications●Symbols used in electric circuit
Without indicator lamp

With lamp
On at pressure rise On at pressure drop

Nominalsize

Max. operating Pressure adjustment
range
pressure
(MPa)
(MPa)

02

NOTE: Either indicator lamp wiring is possible.
However, the load must always be connected to the lamp side.

ACDC

125Vｰ5A, 250Vｰ5A
125Vｰ0.5A, 250Vｰ0.25A

0.4 to 2

HW1ｰ3T0ｰ02（一DC）（一L）

0.1 to 7

HW1ｰ3T1ｰ02（一DC）（一L）

NOTE: Model designation for a pressure switch with an indicator lamp is asshown below.
HW1-3T*-02 -L (With AC indicator lamp, Operating voltage: AC100 to 240 V)-DC-L (With DC indicator lamp, Operating voltage: DC12 to 24 V)●Performance characteristic table
ON / OFF pressure difference
ON / OFF pressuredifference(MPa)●Electric rating of micro switch

7ModelI
ANCILLARY EQUIPMENTS

Set pressure (MPa)■Outside dimensions

133 Max.

HW1ｰ3T*ｰ02（ｰDC）（ｰL）

Operationcheckwindow

Cable inlet G1/2I−3