Industrial Process Instrumentation Klay Instruments / Klay

Engineering supply and technical selection of smart pressure transmitters, flush diaphragm sensors, and submersible level transmitters by Dutch manufacturer Klay Instruments B.V. Configurations tailored for food processing, chemical, and pulp industries.

Series 2000 Pressure and Hydrostatic Level Transmitters

Intelligent transmitters Klay Instruments Series 2000 feature an all stainless steel housing and flush diaphragm. The instruments provide accurate measurement of gauge pressure, vacuum, and liquid level in pipelines and storage tanks across food processing, paper, and pharmaceutical sectors.

All stainless steel housing AISI 304 or AISI 316L offering reliable IP66 protection
Flush mounted diaphragm in AISI 316L or Hastelloy C preventing medium accumulation
Standard two-wire 4-20 mA output with optional digital HART communication protocol
Simple pushbutton zero and span adjustment via display without external test pressure

Series 4000 High Precision Pressure Transmitters

Precision transmitters Klay Instruments Series 4000 deliver fundamental accuracy up to 0.075% with exceptional long-term stability. The instruments are engineered for critical monitoring loops, flow measurement, differential filter pressure, and liquid density assessment in industrial automation.

High accuracy rating of 0.075% for demanding continuous industrial process monitoring
Hazardous area safety approvals conforming to European ATEX Ex-ia and global IECEx
High turndown ratio enabling broad measuring span adjustments without recalibration
Hygienic and threaded process connections tailored for aggressive fluid environments

Series 8000 Analog Pressure Transmitters

Classic transmitters Klay Instruments Series 8000 are designed for demanding operational conditions in pulp, paper, chemical, and marine engineering. Robust construction with a flush diaphragm prevents clogging from thick slurries, chemical resins, and crystallizing suspension mixtures.

Proven analog 4-20 mA circuitry featuring internal potentiometers for zero and span
Special flange and valve adapters allowing thorough flushing without line shutdown
Superior resistance against line hydraulic pressure spikes, shock, and mechanical vibration
Marine approvals including DNV, Lloyd's Register, and Bureau Veritas for vessels

CER-2000 Ceramic Measuring Cell Pressure Transmitters

Transmitters Klay Instruments CER-2000 utilize a capacitive measuring cell made of 99.9% pure aluminum oxide ceramic. These units excel in aggressive acids, alkaline solutions, solvents, and abrasive slurries where metallic diaphragms suffer from premature chemical erosion or wear.

Capacitive ceramic measuring cell providing exceptional protection against abrasion
Superior overpressure resistance withstanding severe repeated pressure surges safely
Wetted part materials including PVDF, PTFE, and high grade stainless steel options
Local digital display and microprocessor control enabling effortless onsite adjustment

Hydrobar and HydroCer Submersible Level Transmitters

Submersible hydrostatic transmitters Klay Instruments Hydrobar and HydroCer provide continuous liquid level monitoring in deep wells, open reservoirs, and industrial wastewater basins. The heavy-duty suspension cable incorporates an internal capillary tube for atmospheric venting.

Fully sealed submersible probe assembly built to rigorous IP68 immersion standards
Durable polyurethane or Teflon suspension cable with integrated air reference vent
Built-in surge and lightning protection protecting electronics from voltage transients
Ceramic sensor diaphragm in HydroCer model suitable for viscous slurries and sludge

TT-2000 Temperature Transmitters and PT100 Sensors

Temperature units Klay Instruments TT-2000 and PT100 sensors deliver dependable thermal process control in pasteurizers, autoclaves, and pipeline networks. Stainless steel housings protect internal circuitry against ambient vibration, humidity, and aggressive sanitizing washdown fluids.

Versatile input supporting PT100 resistance temperature elements with Class A precision
Linear 4-20 mA analog output corresponding proportionally to media process temperatures
Quick-disconnect sanitary thermowells and threaded protective thermowells in steel
Digital indicator option for direct thermal process visualization at equipment stations

Process Diaphragm Selection and Process Connection Materials

Proper diaphragm selection for Klay Instruments (Klay) transmitters ensures measurement stability and extended service life. For standard fluid media, AISI 316L stainless steel provides dependable corrosion resistance and smooth surface finish.

In chemical processes with concentrated acids and chlorine solutions, Hastelloy C, tantalum, or PTFE polymer coatings are preferred.

When abrasive suspensions or mineral slurries are present, CER-2000 capacitive ceramic measuring cells made of 99.9% aluminum oxide provide superior resistance against mechanical abrasion and surface deformation.

Sanitary Tank and Pipeline Installation in Food Processing

Installing Klay Instruments transmitters on sanitary vessels requires complete elimination of dead legs. Series 2000-SAN and 4000-SAN feature front flush diaphragms aligned flush with tank walls via welding adapters or sanitary clamps such as Tri-Clamp, SMS, DIN 11851, and Varivent.

This alignment allows thorough cleaning during automated clean-in-place CIP cycles and steam-in-place SIP sterilization up to 140 °C. Food-grade EPDM or FKM elastomeric O-rings provide dependable sealing for all hygienic process adapters.

Zero and Span Configuration Without External Test Pressure

Intelligent transmitters Klay Instruments Series 2000, 3000, and 4000 incorporate an onboard microprocessor and clear matrix display.

Technicians can adjust measuring span and zero point directly using three pushbuttons located behind the protective cover without needing a deadweight tester or pressure source.

The intuitive menu permits setting engineering units (bar, kPa, mbar, mH2O), output damping intervals, and current loop direction. Remote configuration and system diagnostics are supported via HART communication protocol.

Protection Against Pressure Surges and Hydraulic Water Hammer

In hydraulic networks experiencing abrupt pump starts and quick valve closures, transient pressure spikes can stress thin metal diaphragms. To safeguard measuring elements, Klay Instruments provides integrated pulsation dampers, internal restrictors, and fluid-filled buffering chambers.

In severe pulsing installations, CER-2000 transmitters featuring ceramic diaphragms withstand repeated overload up to ten times nominal rating without zero shift. On high-discharge pump lines, syphon tubes help isolate violent pressure shock waves.

Submersible Hydrobar Operation in Deep Wells and Basins

Submersible hydrostatic transmitters Klay Instruments Hydrobar and HydroCer monitor liquid levels in deep boreholes, municipal reservoirs, and intake structures.

The suspension cable incorporates an internal venting tube connecting the diaphragm back to ambient barometric pressure, eliminating meteorological errors. The atmospheric cable end requires a desiccant cartridge to prevent moisture accumulation inside the electronics.

During well deployment, the probe assembly is secured with strain-relief clamps and protective nose cones.

Nameplate Data Identification and Seal Gasket Selection

Accurate replacement parts procurement and sensor identification for Klay Instruments transmitters depend on nameplate details.

The stainless steel tag provides the serial number, ordering code (such as 2000-SAN-G-1-4-W), calibrated pressure range, supply voltage parameters, and output signal format.

This specification code defines wetted metallurgy, diaphragm fill fluid (silicone or white mineral oil), process fitting thread, and explosion proof rating. Providing a photo of the nameplate ensures rapid configuration verification.

Klay Instruments / Klay and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Klay Instruments / Klay and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.