S.A Electronic Private Limited

Principle: Mechanical – a curved tube straightens as pressure increases, moving the pointer.
Features: Analog, rugged, widely used.
Applications:

• Steam boilers

• Air compressors

• Pharmaceutical reactors

• Pipelines

Example: WIKA 232.50, 233.50

Principle: Pressure deflects a diaphragm connected to a pointer.
Features: Ideal for low pressure or corrosive fluids, hygienic designs available.
Applications:

• Pharmaceutical clean water lines

• Corrosive chemical monitoring

• Food & beverage processing

Principle: Measures difference between two pressures.
Features: Can be analog or digital, sometimes used with capillary lines.
Applications:

• Filter monitoring (pressure drop)

• Level measurement in pressurized tanks

• Clean room monitoring

Example: WIKA 732.50, 732.54

Principle: Capsule expands with pressure; pointer moves on dial.
Features: Very sensitive, for low pressures.
Applications:

• Vacuum systems

• Gas lines

• Laboratory use

Principle: Pressure is transmitted to gauge through diaphragm with fill fluid.
Features: Prevents corrosive or viscous fluids from entering the gauge.
Applications:

• Pharma reactors

• Corrosive chemical tanks

• High purity systems

Note: Essential in GMP / sterile environments.

Principle: Sensor (strain gauge, piezoresistive, capacitive) converts pressure to digital reading.
Features: High accuracy, data logging, calibration capability.
Applications:

• Calibration labs

• Pressure testing of vessels

• Pharmaceutical instrumentation

Example: WIKA CPG1500, CPG2500

Principle: Measures pressure relative to vacuum instead of atmospheric pressure.
Applications:

• Vacuum systems

• Pharmaceutical freeze-drying

• Vacuum filtration

• Pressure Range: 0–1 bar up to 0–600 bar

• Connection Type: Thread size (½″ BSP/NPT)

• Case Material: SS316, SS304, plastic

• Filling: Glycerin/oil filled for vibration dampening

• Process Compatibility: Corrosive / high-purity fluids

• Reactor & vessel pressure monitoring

• Filter differential pressure measurement

• Compressed air & gas lines

APPLICATIONS ■ FOR GASES, COMPRESSED AIR, VAPOUR; LIQUID, PASTY, POWDERY AND CRYSTALLISING MEDIA ■ ULTRA-PURE STEAM SYSTEMS FOR SIP ■ HYDROSTATIC LEVEL MEASUREMENT ■ VACUUM MONITORING, E.G. VACUUM CONVEYORS, PUMP MONITORING ■ FOOD AND BEVERAGE INDUSTRY, PHARMACEUTICAL INDUSTRY, BIOTECHNOLOGY, SANITARY APPLICATIONS

APPLICATIONS OF THE LIQUID-FILLED GAUGE

·         FOR MEASURING LOCATIONS WITH HIGH DYNAMIC PRESSURE LOADS AND VIBRATIONS

·         FOR GASEOUS AND LIQUID MEDIA THAT ARE NOT HIGHLY VISCOUS OR CRYSTALLISING AND WILL NOT ATTACK COPPER ALLOY PARTS

·         HYDRAULICS

·         COMPRESSORS, SHIPBUILDING

·         CONTROL AND REGULATION OF PROCESSES

·         MONITORING OF PLANTS AND SWITCHING OF CIRCUITS

·         FOR GASEOUS AND LIQUID AGGRESSIVE MEDIA THAT ARE NOT HIGHLY VISCOUS OR CRYSTALLISING, ALSO IN AGGRESSIVE ENVIRONMENTS

·         CHEMICAL INDUSTRY, PETROCHEMICAL INDUSTRY, POWER PLANTS, MINING, ON-/OFFSHORE, ENVIRONMENTAL TECHNOLOGY, MACHINE BUILDING AND GENERAL PLANT CONSTRUCTION

APPLICATIONS

·         FOR GASEOUS AND LIQUID MEDIA THAT ARE NOT HIGHLY VISCOUS OR CRYSTALLISING AND WILL NOT ATTACK COPPER ALLOY PARTS

·         PNEUMATICS

·         HEATING AND AIR-CONDITIONING TECHNOLOGY

·         MEDICAL ENGINEERING

·         CONTROL AND REGULATION OF INDUSTRIAL PROCESSES AT MEASURING POINTS WITH INCREASED OVERPRESSURE AND SCALE RANGES FROM 0 … 25 MBAR

·         MONITORING OF PLANTS AND SWITCHING OF ELECTRIC CIRCUITS

·         FOR GASEOUS AND LIQUID, AGGRESSIVE AND HIGHLY VISCOUS OR CONTAMINATED MEDIA, ALSO IN AGGRESSIVE AMBIENCE

·         PROCESS INDUSTRY: CHEMICAL, PETROCHEMICAL, POWER PLANTS, MINING, ON- AND OFFSHORE, ENVIRONMENTAL TECHNOLOGY, MACHINE BUILDING AND GENERAL PLANT CONSTRUCTION

·         HIGH RELIABILITY AND LONG SERVICE LIFE

·         WIDE CHOICE OF SPECIAL MATERIALS

·         UP TO 4 SWITCH CONTACTS PER INSTRUMENT

·         ALSO AVAILABLE WITH LIQUID FILLING FOR HIGH DYNAMIC PRESSURE LOADS OR VIBRATIONS

·         INSTRUMENTS WITH INDUCTIVE CONTACTS FOR USE IN HAZARDOUS AREAS

·         INSTRUMENTS WITH CONTACTS FOR PLC APPLICATIONS

pressure gauge shows how much force a fluid (gas or liquid) is exerting inside a system—usually displayed in units like bar, psi, or MPa.

• Industrial machinery
• Oil & gas pipelines
• Hydraulic and pneumatic systems
• HVAC systems
• Chemical plants

• Bourdon tube gauges (most common for general use)
• Diaphragm gauges (for low pressure or corrosive media)
• Capsule gauges (for very low pressure)
• Digital pressure gauges (more precise, with electronic display)

• High accuracy and reliability
• Durable stainless steel construction
• Wide pressure ranges (vacuum to very high pressure)
• Options for harsh environments (vibration, corrosion, etc.)

• 232.50 / 233.50 – Stainless steel industrial gauges
• 111.10 – Economical standard gauge (often used in general applications)
• DPG40 – Digital pressure gauge

Consider:

• Pressure range needed
• Type of fluid (gas, liquid, corrosive)
• Environment (temperature, vibration)
• Accuracy requirements

APPLICATIONS

■■ MACHINE TOOLS

■■ HYDRAULICS AND PNEUMATICS

■■ PUMPS AND COMPRESSORS

■■ SPECIAL-PURPOSE MACHINE BUILDING

APPLICATIONS

·         HYDRAULICS AND PNEUMATICS

·         PUMPS AND COMPRESSORS

·         MACHINE BUILDING

 Applications

·         Calibration service industry

·         Measurement laboratories

·         Machine building

·         Hydraulics and pneumatics

APPLICATIONS

·         SANITARY APPLICATIONS

·         FOOD AND BEVERAGE PRODUCTION

·         PHARMACEUTICAL INDUSTRY, BIOTECHNOLOGY INDUSTRY, PRODUCTION OF ACTIVE INGREDIENTS

·         PRODUCTION OF ASEPTIC BASIC MATERIALS IN THE CHEMICAL INDUSTRY

APPLICATIONS

·         AGGRESSIVE, HIGHLY VISCOUS, CRYSTALLISING OR HOT MEDIA

·         PROCESS INDUSTRY

·         MACHINE BUILDING AND AUTOMATION

APPLICATIONS

·         AGGRESSIVE, HOT, CORROSIVE, ENVIRONMENTALLY HAZARDOUS OR TOXIC MEDIA

·         OIL AND GAS INDUSTRY, CHEMICAL AND PETROCHEMICAL INDUSTRIES

·         WATER TREATMENT

·         VERSATILE IN APPLICATION

APPLICATIONS

·         FOR GASEOUS, DRY AND AGGRESSIVE MEDIA, ALSO IN AGGRESSIVE ENVIRONMENTS

·         PROCESS INDUSTRY: CHEMICAL, PETROCHEMICAL, PHARMACEUTICAL, BIOTECHNOLOGY, MACHINE AND POWER GENERATION INDUSTRIES

• For measuring locations with high dynamic pressure loads and vibrations
• For gaseous and liquid media that are not highly viscous or crystallising and will not attack copper alloy parts
• Hydraulics
• Compressors, shipbuilding

• Very good vibration and shock resistance
• Especially robust design
• Type approval for the shipbuilding industry
• Scale ranges to 0 ... 1,000 bar or 0 ... 15,000 psi

• For gaseous and liquid aggressive media that are not highly viscous or crystallising, also in aggressive ambience
• Specifically for the requirements within the process industry, mainly in the chemical and petrochemical industry, the oil and gas industry, power engineering and also in water/wastewater technology
• Particularly suitable for use in wellhead control panels (WHCPs) and hydraulic power units (HPUs)

• Fully welded mounting ring to prevent water ingress into the control panel (ingress protection IP66)
• All stainless steel construction
• Optionally as safety version "S3" per EN 837-1

pressure gauge shows how much force a fluid (gas or liquid) is exerting inside a system—usually displayed in units like bar, psi, or MPa.

• Industrial machinery
• Oil & gas pipelines
• Hydraulic and pneumatic systems
• HVAC systems
• Chemical plants

• Bourdon tube gauges (most common for general use)
• Diaphragm gauges (for low pressure or corrosive media)
• Capsule gauges (for very low pressure)
• Digital pressure gauges (more precise, with electronic display)

• High accuracy and reliability
• Durable stainless steel construction
• Wide pressure ranges (vacuum to very high pressure)
• Options for harsh environments (vibration, corrosion, etc.)

• 232.50 / 233.50 – Stainless steel industrial gauges
• 111.10 – Economical standard gauge (often used in general applications)
• DPG40 – Digital pressure gauge

Consider:

• Pressure range needed
• Type of fluid (gas, liquid, corrosive)
• Environment (temperature, vibration)
• Accuracy requirements

APPLICATIONS

·         MACHINE TOOLS

·         HYDRAULICS AND PNEUMATICS

·         AUTOMATION ENGINEERING

·         SPECIAL-PURPOSE MACHINE BUILDING

APPLICATIONS

·         ACQUISITION AND DISPLAY OF PROCESSES

·         OUTPUT SIGNALS 4 ... 20 MA, 0 ... 20 MA, 0 ... 10 V FOR THE TRANSMISSION OF PROCESS VALUES TO THE CONTROL ROOM

·         FOR MEASURING POINTS WITH INCREASED OVERLOAD

·         EASY-TO-READ, ANALOGUE ON-SITE DISPLAY NEEDING NO EXTERNAL POWER

·         SAFETY-RELATED APPLICATIONS

APPLICATIONS

·         HOMOGENISER MACHINES FOR MILK, BEVERAGES, COSMETICS AND PHARMACEUTICAL PREPARATIONS

·         MACHINES FOR THE PRODUCTION OF EMULSIONS

SPECIAL FEATURES

·         PROCESS CONNECTION WITH FLUSH, ALL WELDED DIAPHRAGM, WITH OR WITHOUT RETAINER FLANGE

·         FOR HIGHEST DYNAMIC PRESSURES ≤ 2,500 BAR

·         SYSTEM FILL FLUIDS FDA AND USP CONFORM

·         ROBUST, ALL WELDED DESIGN

DESCRIPTION

DIAPHRAGM SEALS ARE USED FOR THE PROTECTION OF PRESSURE MEASURING INSTRUMENTS IN APPLICATIONS WITH DIFFICULT MEDIA. IN DIAPHRAGM SEAL SYSTEMS, THE DIAPHRAGM OF THE DIAPHRAGM SEAL EFFECTS THE SEPARATION OF THE INSTRUMENT AND THE MEDIUM. THE PRESSURE IS TRANSMITTED TO THE MEASURING INSTRUMENT VIA THE SYSTEM FILL FLUID WHICH IS INSIDE THE DIAPHRAGM SEAL SYSTEM. FOR THE IMPLEMENTATION OF DEMANDING CUSTOMER APPLICATIONS, THERE ARE A WIDE VARIETY OF DESIGNS, MATERIALS AND SYSTEM FILL FLUIDS AVAILABLE. FOR FURTHER TECHNICAL INFORMATION ON DIAPHRAGM SEALS AND DIAPHRAGM SEAL SYSTEMS SEE IN 00.06 "APPLICATION, OPERATING PRINCIPLE, DESIGNS".

THE MODEL 990.30 DIAPHRAGM SEAL IS A SPECIAL DEVELOPMENT FOR HOMOGENISER MACHINES IN SANITARY APPLICATIONS. THIS DIAPHRAGM SEAL IS AVAILABLE WITH PROCESS CONNECTIONS IN VARIOUS DESIGNS AND IS THUS SUITABLE FOR ALL COMMON MEASURING POINTS. THE DIAPHRAGM SEAL SYSTEMS ENSURE RELIABLE MEASUREMENTS, EVEN WITH HIGH LOADING THROUGH VIBRATIONS AND PRESSURE SPIKES. MOUNTING OF THE DIAPHRAGM SEAL TO THE MEASURING INSTRUMENT MAY BE MADE VIA A DIRECT CONNECTION OR A FLEXIBLE CAPILLARY. FOR THE MATERIAL SELECTION WIKA OFFERS A VARIETY OF SOLUTIONS, IN WHICH THE UPPER BODY OF THE DIAPHRAGM SEAL AND THE WETTED PARTS CAN BE MADE OF IDENTICAL OR DIFFERENT MATERIALS.

Diaphragm seals are used for the protection of pressure measuring instruments in applications with difficult media.

In diaphragm seal systems, the diaphragm of the diaphragm seal effects the separation of the instrument and the medium.

The pressure is transmitted to the measuring instrument via the system fill fluid which is inside the diaphragm seal system.

For the implementation of demanding customer applications, there are a wide variety of designs, materials and system fill fluids available.

The model 990.10 diaphragm seal with threaded connection in threaded design is suitable for versatile application areas.

A replacement of the lower body is possible without modifications on the diaphragm seal system. With this diaphragm seal, high pressure ranges up to 250 bar can be covered.

Mounting of the diaphragm seal to the measuring instrument may be made via a direct connection, for high temperatures via a cooling element or via a flexible capillary.

For the material selection WIKA offers a variety of solutions, in which the upper body of the diaphragm seal and the wetted parts can be made of identical or different materials. The wetted parts can, as an alternative, be coated.

• 0 … 250 bar [0 … 3,600 psi] or all other equivalent vacuum or combined pressure and vacuum ranges

• Oil and grease free per ASTM G93-03 level F WIKA standard (< 1,000 mg/m²)

• International

• Axial adapter

• Direct mounting

DIN ISO 228-1

• G ½ A

 ASME B 1.20.1

• ½ NPT

DIN 13-1

• M20 x 1.5

 ISO 7-1

• R ½

Upper body of diaphragm seal

Stainless steel 1.4404 (316L)

Wetted parts

Stainless steel 1.4404 (316L)

• For aggressive, hot, corrosive, environmentally hazardous or toxic media
•  Process industry