PressureSwitchesQR-html.html

Pressure Switches:
The SQ range of compact pressure switches are manufactured with quality in mind, unlike many other manufacturers who’s products mechanical life
is 1 million cycles the SQ range has a mechanical lifetime of 1.5 million cycles when operated below a pressure of 50bar. Pressures from 0.2bar to
100bar can be accommodated with either factory fixed or adjustable pressure ranges. With a choice of Diaphragm materials the switches can cope
with a variety of chemicals including compressed air, hydraulic oil, engine oil, heating oil and water.

Features:

- Robust in any severe application
- Customised body housing (Steel, 316SS, Brass)
- Selectable contact (Gold or Silver Contact)
- Screw / push on terminal contact
- Cost effective yet high quality
- Easily adjustable pressure range setting

Pressure Switch Part Numbers

Pressure switch
Hex size
Body material
Contact type
Diaphragm material
Connection fitting
Screw thread
Pressure rating

Example SQ24B-ANC-2A1

Pressure switch

SQ Series

Hex length

24mm
27mm

Body material

B = Brass
S = Stainless Steel grade 316
Z = Zinc plated steel

Contact type

A = Normally open contacts
B = Normally closed contacts
S = Single pole double throw (SQ 27 only)

Diaphragm material

N = Nitrile (standard)
V = VITON
E = EPDM (ethylene propylene diene Monomer)

Connection fitting

S = Screw terminals
T = Tag (spade terminal)
C = DIN Cap

Screw thread

1 = M10X1 (tap 1°)
2 = M10X1
3 = M12X1.5
4 =

⅛

" PT

5 = ¼" PT
6 =

⅛

" G

7 = ¼" G
8 =

⅛

" NPT

9 = ¼" NPT

Pressure rating fixed

F1 = 0.2 Bar
F2 = 1.1 Bar
F3 = 5 Bar
F4 = 50 Bar

Adjustable

A1 = 0.2-1 Bar
A2 = 1-19 Bar
A3 = 20-50 Bar
A4 = 51-100 Bar

Optional Socket Type

D = DT04-2P
A = 250 Type

Socket wiring

1 = 3mm PVC (2P)

Add (XX) to end

2 = 3mm PVC (2P) with wrap up sheath
3 = 6.4mm PE Cable
4 = 3mm PVC (2P) with heat shrink sheath

Cap only part numbers
SQA-1130

The Comus International group of companies consists of:

Comus International
454 Allwood Road
Clifton
New Jersey 07012
U.S.A

Tel: (1)973 - 777 - 6900
Fax:(1)973 - 777 - 8405
email: info@comus-intl.com
internet: http://www.comus-intl.com

Assemtech Europe Limited
Unit 7, Rice Bridge Industrial Estate
Thorpe - Le - Soken
Essex
England
CO16 0HL
Tel: +44 (0)1255 862236
Fax: +44 (0)1255 862014
email: sales@assemtech.co.uk
internet: http://www.assemtech.co.uk

Comus Belgium BVBA
Overhaamlaan 40
B-3700 Tongeren
Belgium

Tel: +32 (0)12 390400
Fax: +32 (0)12 235754
email: info@comus.be
internet: http://www.comus.be

Switching Technologies Gunther
B-9, B-10, & C-1 Special Economic Zone (MEPZ)
Kadapperi
Tambaram
Chennai 600 045
India

Comus Electronics and Technologies
India Private Limited
No 3. Kamaraj Nagar 2nd Street
Tambaram Sanatorium
Chennai 600045
India
Tel: +91 44 43219090
Fax: +91 44 22628198
email: P.Ramesh@stg-india.com
chudan@comus-intl.com
Website:http://www.comusindia.com

We also have a large network of worldwide agents. These can be found on any of our websites, or on our company profile brochure.

Com/19/jan11/Iss.1

Our Switch Ranges:
We now have a comprehensive range of switches including: Reed Switches, Tilt Switches, Proximity Switches and Magnets,
Electronic Proximity Switches, Non Mercury Tilt, Tip Over and Acceleration Switches, Float Switches, Glass Mercury and Mercury
Switches.

How a Pressure switch works:

A pressure switch works by a rubber disc (the diaphragm) changing it’s shape when subjected to

pressure from either a fluid or a gas. This deflection of the diaphragm in turn pushes a small rod
or piston which connects to a set of contacts via a spring. When the pressure is enough to over-
come the tension of the spring the contacts will either open or close depending on the set up thus
making or breaking the connection. This action can be utilised in many applications such as alerting
when pressure drops in medical equipment, cutting of power to machines in the event of a fault,
warning and controlling of air or oil pressure and detection of leaks in pressurised systems.

$IAPHRAGM

#ONTACTS

0ISTON

!DJUSTING3CREW

3PRING

ISO 9001:2008
CERTIFICATE NO: FM 21080

ISO 9001:2008
CERTIFICATE NO: 03-12314

Comus Technologies BV
Jan Campertstraat 11
6416 SG Heerlen,
The Netherlands

Tel: +31 (0) 45 5439345
Fax: +31 (0) 45 5427216
email: jperez@comus-intl.com (USA, Canada)

G.Kemper@comus.be (Europe, Asia)

Please scan this quick response code
with your QR enabled smartphone

PRESSURE

SWITCHES

TYPE

SQ24Z

SQ24S

SQ24B

SQ27Z

SQ27S

SQ27B

SQ27Z

SQ27S

SQ27B

SQ24Z

SQ24S

SQ24B

Hex Length

24mm

27mm

24mm

Body Material

Zinc Plated Steel

316 Grade Stainless Steel

Brass

Zinc Plated Steel

316 Grade Stainless Steel

Brass

Zinc Plated Steel

316 Grade Stainless Steel

Brass

Zinc Plated Steel

316 Grade Stainless Steel

Brass

Wiring

Screw / Push on

Spade Terminal

Screw / Push on

Spade Terminal

Screw / Push on

Spade Terminal

Screw /

Spade Terminal

Screw /

Spade Terminal

Screw /

Spade Terminal

Push on

Spade Terminal

Push on

Spade Terminal

Push on

Spade Terminal

DT04-2P
250 Type

Contact rating (Max)

4A/42Vdc,4A 240Vac

Response Frequency

2Hz

Max Voltage Peak

1.5KV (IEC60947-2)

Electric Insulation

100MΩ (IEC60092-54)

Operation Temperature

-10°C~100°C

Membrane Materials

NBR(Stnd)-30°C~100°C

VITON-15°C~120°C
EPDM-30°C~120°C

NBR(Standard)-30°C~100°C

VITON-15°C~120°C
EPDM-30°C~120°C

NBR(Standard)-30°C~100°C

VITON-15°C~120°C
EPDM-30°C~120°C

NBR(Standard)-30°C~100°C

VITON-15°C~120°C
EPDM-30°C~120°C

NBR(Standard)-30°C~100°C

VITON-15°C~120°C
EPDM-30°C~120°C

NBR(Standard)-30°C~100°C

VITON-15°C~120°C
EPDM-30°C~120°C

NBR(Standard)-30°C~100°C

VITON-15°C~120°C
EPDM-30°C~120°C

NBR(Standard)-30°C~100°C

VITON-15°C~120°C
EPDM-30°C~120°C

NBR(Standard)-30°C~100°C

VITON-15°C~120°C
EPDM-30°C~120°C

NBR(Standard)-30°C~100°C

VITON-15°C~120°C
EPDM-30°C~120°C

NBR(Standard)-30°C~100°C

VITON-15°C~120°C
EPDM-30°C~120°C

NBR(Standard)-30°C~100°C

VITON-15°C~120°C
EPDM-30°C~120°C

Pressure Range

0.2~100bar

0.3~100bar

0.2~100bar

Pressure Acting Variation

±5% of set point@20°C

Piping Selection

M10*1(TAP1°)

M10*1, M12*1.5

PT1/8”,PT1/4”

NPT1/8”, NPT1/4”

M10*1(TAP1°)

M10*1, M12*1.5

PT1/8”,PT1/4”

NPT1/8”, NPT1/4”

M10*1(TAP1°)

M10*1, M12*1.5

PT1/8”,PT1/4”

NPT1/8”, NPT1/4”

M10*1(TAP1°)

M10*1, M12*1.5

PT1/8”,PT1/4”

NPT1/8”, NPT1/4”

M10*1(TAP1°)

M10*1, M12*1.5

PT1/8”,PT1/4”

NPT1/8”, NPT1/4”

M10*1(TAP1°)

M10*1, M12*1.5

PT1/8”,PT1/4”

NPT1/8”, NPT1/4”

M10*1(TAP1°)

M10*1, M12*1.5

PT1/8”,PT1/4”

NPT1/8”, NPT1/4”

M10*1(TAP1°)

M10*1, M12*1.5

PT1/8”,PT1/4”

NPT1/8”, NPT1/4”

M10*1(TAP1°)

M10*1, M12*1.5

PT1/8”,PT1/4”

NPT1/8”, NPT1/4”

M10*1(TAP1°)

M10*1, M12*1.5

PT1/8”,PT1/4”

NPT1/8”, NPT1/4”

M10*1(TAP1°)

M10*1, M12*1.5

PT1/8”,PT1/4”

NPT1/8”, NPT1/4”

M10*1(TAP1°)

M10*1, M12*1.5

PT1/8”,PT1/4”

NPT1/8”, NPT1/4”

Contact Model

NO,NC

SPDT

NO,NC

Body Protection

IP00 (EIC60529)

Protection

IP67 (EIC60529)

Mechanical Life

1.5Million cycles<50bar

Screw Torque

<0.35Nm

Shock Resistance

ISO / IEC 17025, Half sine wave,

Acceleration:30G@14ms ±X ±Y ±Z axis

ISO / IEC17025, Half sine wave,

Acceleration:30G@14ms ±X ±Y ±Z axis

ISO / IEC17025, Half sine wave,

Acceleration:30G@14ms ±X ±Y ±Z axis

ISO / IEC17025, Half sine wave,

Acceleration:30G@14ms ±X ±Y ±Z axis

ISO / IEC17025, Half sine wave,

Acceleration:30G@14ms ±X ±Y ±Z axis

ISO / IEC17025, Half sine wave,

Acceleration:30G@14ms ±X ±Y ±Z axis

ISO / IEC17025, Half sine wave,

Acceleration:30G@14ms ±X ±Y ±Z axis

ISO / IEC17025, Half sine wave,

Acceleration:30G@14ms ±X ±Y ±Z axis

ISO / IEC17025, Half sine wave,

Acceleration:30G@14ms ±X ±Y ±Z axis

ISO / IEC17025, Half sine wave,

Acceleration:30G@14ms ±X ±Y ±Z axis

ISO / IEC17025, Half sine wave,

Acceleration:30G@14ms ±X ±Y ±Z axis

ISO / IEC17025, Half sine wave,

Acceleration:30G@14ms ±X ±Y ±Z axis

Vibration Resistance

ISO / IEC 17025, Sine wave 5-200Hz, Acceleration 10G,

Displacement :16mm, sweeping rate :1 Oct/min, test direc-