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FineTek Co., Ltd.
Pressure Switch

Pressure Switch

Product catalog summary

Overview

This document details the technical specifications, features, application areas, ordering information, and compliance standards for FineTek's industrial pressure switch series, including SQ24, SQ27, and related models. These switches are engineered for robust pressure detection and control across diverse industrial sectors.

1. Technical Specifications

Electrical Ratings

Maximum contact rating: 4A at 50V DC or 250V AC (UL508 certified)
Insulation resistance: 100MW (IEC60092-54 section 3)
Dielectric strength: 1.5KV peak voltage (IEC60947-2)
Response frequency: 2 Hz

Mechanical and Environmental Characteristics

Mechanical life: 1.5 million cycles at 50 bar pressure
Shock resistance: 30G half sine wave at 14ms on X, Y, Z axes (ISO/IEC 17025)
Vibration resistance: 5-200 Hz sine wave, 10G acceleration, 16 mm displacement, 1 hour per axis (ISO/IEC 17025)
Protection ratings: IP00, IP65 (SQ27 series), and IP67 (SQ24 series) per IEC 60529
Operating temperature range varies by diaphragm material: from -30°C (NBR Low Temp) up to 100°C

Pressure Ranges and Tolerances

Standard models: 0.2 to 99 bar
High pressure models: 100 to 300 bar
Pressure tolerance:
- 0.1 bar for 0.2-0.9 bar range
- 0.5 bar for 1-9.9 bar range
- 5% tolerance for 10-300 bar ranges

Materials and Dimensions

Body materials: Zinc-plated steel, SUS316 stainless steel, brass
Diaphragm materials: NBR (standard and low temperature), VITON, EPDM
Terminal types: Screw, push-on, spade terminals, and DIN 43650A connectors
Hex sizes: 24 mm (SQ24 series), 27 mm (SQ27 series), with thread options including M10*1, M12*1.5, PT 1/8", PT 1/4", G 1/8", G 1/4", NPT 1/8", NPT 1/4"
Screw torque: less than 0.35 Nm

2. Features and Applications

Robust design suitable for harsh industrial environments
Customizable body housing and diaphragm materials to meet specific application needs
Selectable contact materials (gold or silver) and contact forms (NO, NC, SPDT)
Adjustable pressure range settings available on field-adjustable models
Typical applications: automobile braking systems, piping pressure control, fire fighting hydraulic detection, lubrication systems, sprinkler systems, air compressors, medical equipment, tire manufacturing
CE compliance requires use of anti-dust covers (SQA-1130 or SQA-1136)

3. Ordering Information

Product codes specify series, pressure range, diaphragm material, contact form, wiring type, body material, and connection type. Key coding elements include:

Series: SQ24, SQ27
Contact form: A (NO), B (NC), C (SPDT)
Diaphragm material: N (NBR), V (VITON), D (EPDM), R (NBR Low Temp)
Wiring: W (Screw), P (Push-on), E (Spade terminal)
Body material: 5 (Zinc-plated steel), 6 (SUS316), U (Brass)
Connection types: M10X1, M12X1.5, PT, G, NPT threads

Pressure tolerances vary by range: ±0.1 bar (0.3-0.9 bar), ±0.5 bar (1-9.9 bar), ±5% (10-300 bar).

4. Protection Accessories

Anti-dust covers SQA-1130 (NBR) and SQA-1136 (Nylon) provide IP67 protection
SQA-1136 is compatible only with SQ24 push-on terminal types

5. Compliance and Standards

UL508 certification for electrical ratings
IEC standards compliance: IEC 60529 (IP ratings), IEC 60947-2 (electrical safety), IEC 60092-54 (insulation resistance)
ISO/IEC 17025 certified shock and vibration testing
RoHS compliant materials
CE compliance requires additional protective covers

6. Additional Information

Socket wiring options include DT04-2P connectors and cables with PVC or PE insulation, with optional protective hoses and heat shrink tubing
Product dimensions vary by model and connection type, with typical hex sizes of 9 mm for M10 and 12 mm for M12 connections
Contact and distribution information available for FineTek branches and distributors in Taiwan, China, Singapore, Germany, and the USA

Summary

FineTek's SQ24 and SQ27 pressure switch series offer versatile, robust solutions for industrial pressure sensing and control. With a wide range of pressure tolerances, materials, and connection options, these switches are suitable for demanding applications in automotive, hydraulic, medical, and manufacturing industries. Compliance with international standards and availability of protective accessories ensure reliable and safe operation in harsh environments.

Catalog excerpts

Your Made-To-Order Solutions

Open the catalog to page 1

CE (need to add anti-dust cover SQA-1130. CE (need to add anti-dust cover SQA-1130. CE (need to add anti-dust cover SQA-1130. i Robust In Any Severe Application i Customized Body Housing (Gold Contact or Silver Contact) i Screw / Push-on Terminal Contact Selectable i High Quality And Cost Effective i Adjustable Pressure Range Setting Pressure Detection For Automobile Braking System Pressure Control For Piping System Hydraulic Detection For Fire Fighting System Hydraulic Industry Lubrication System Sprinkler System Medical Equipment Tire Manufacturing

Open the catalog to page 2

ORDER INFORMATION Product Dimension SQ24 Series Field Adjustable Pressure SQ24 Series Fixed Pressure Body Material W: Screw P: Push-on E: Spade Terminal Body Protect Cover: SQA-1130 Bady Protect Cover: SQB-1136 + Only SQ24 Push-on Type to use. To comply with CE, SQ24 series need to add anti-dust

Open the catalog to page 3

SQ24 HIGH PRESSURE SPST TYPE CE (need to add anti-dust cover SQA-1130. CE (need to add anti-dust cover SQA-1130. CE (need to add anti-dust cover SQA-1130. i Robust In Any Severe Application i Customized Body Housing (Gold Contact or Silver Contact) i Screw / Push-on Terminal Contact Selectable i High Quality And Cost Effective i Adjustable Pressure Range Setting Pressure Detection For Automobile Braking System Pressure Control For Piping System Hydraulic Detection For Fire Fighting System Hydraulic Industry Lubrication System Sprinkler System Medical Equipment Tire Manufacturing

Open the catalog to page 4

ORDER INFORMATION Product Dimension SQ24 Series Field Adjustable Pressure W: Screw P: Push-on E: Spade Terminal SQ24 Series Fixed Pressure Body Material W: Screw P: Push-on E: Spade Terminal Body Protect Cover: SQA-1130 Bady Protect Cover: SQB-1136 + Only SQ24 Push-on Type to use. To comply with CE, SQ24 series need to add anti-dust

Open the catalog to page 5

Robust In Any Severe Application Customized Body Housing Selectable Contact (gold Contact Or Silver Contact) Screw / Push-on Terminal Contact Selectable High Quality And Cost Effective Adjustable Pressure Range Setting Pressure Detection For Automobile Braking System Pressure Control For Piping System Hydraulic Detection For Fire Fighting System Hydraulic Industry Lubrication System Sprinkler System Medical Equipment Tire Manufacturing

Open the catalog to page 6

ORDER INFORMATION Product Dimension SQ27 Series Field Adjustable Pressure SQ27 Series Fixed Pressure Body Material P: Push-on E: Spade Terminal

Open the catalog to page 7

Robust In Any Severe Application Customized Body Housing Selectable Contact (Gold Contact or Silver Contact) Screw / Push-on Terminal Contact Selectable High Quality And Cost Effective Adjustable Pressure Range Setting Pressure Detection For Automobile Braking System Pressure Control For Piping System Hydraulic Detection For Fire Fighting System Hydraulic Industry Lubrication System Sprinkler System Medical Equipment Tire Manufacturing

Open the catalog to page 8

ORDER INFORMATION SQ27 DIN Series Field Adjustable Pressure Product Dimension SQ27 DIN Series Fixed Pressure Body Material

Open the catalog to page 9

SQ24 WITH EXTENSION SOCKET Robust In Any Severe Application Customized Body Housing Selectable Contact (gold Contact Or Silver Contact) Screw / Push-on Terminal Contact Selectable High Quality And Cost Effective Adjustable Pressure Range Setting Pressure Detection For Automobile Braking System Pressure Control For Piping System Hydraulic Detection For Fire Fighting System Hydraulic Industry Lubrication System Sprinkler System Medical Equipment Tire Manufacturing

Open the catalog to page 10

ORDER INFORMATION Product Dimension Socket Type Socket Wiring SQ24 Series Fixed Pressure Body Material V:VITON R: NBR(Low Temp. 03, PVC (2P) with wrap up hose 03, PVC (2P) with termo-sriank hose 03, PVC (2P) with wrap up hose 03, PVC (2P) with termo-sriank hose

Open the catalog to page 11

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