Pressure transmitters and digital pressure gauges ULFA / ULFA Tech

Industrial pressure transmitters, differential pressure gauges and switches ULFA / ULFA Tech for automation systems and cleanrooms. Technical selection.

Differential pressure transmitters ULFA / ULFA Tech series ADT

Digital differential pressure transmitters ULFA / ULFA Tech series ADT are engineered for monitoring flow and pressure drops in clean air and non-corrosive gas ducts. The instruments incorporate a high-resolution liquid crystal display for industrial ventilation.

Five and half digit illuminated LCD readout with high measurement accuracy 0.2%
Standard 4-20 mA current loop analog output for plant automation controllers
Integrated single-level SPDT threshold switch for alarm and interlock loops
Rugged protective housing engineered for wall brackets and panel enclosures

Digital differential pressure instruments ULFA / ULFA Tech series AIT

Compact microprocessor-based differential pressure instruments ULFA / ULFA Tech series AIT are developed for continuous monitoring of gas streams in industrial ductwork. The units feature bright LED numerical readouts and dual threshold switch logic for machinery safety.

Five-digit numerical LED indicator providing precision accuracy rating of 0.25%
Selectable output formats including 4-20 mA or 1-5 VDC for control electronics
Dual SPDT relay contact outputs with fully adjustable setpoint thresholds
Firmware support for peak pressure detection and differential delta-P mode

Precision differential pressure transmitters ULFA / ULFA Tech series PATM

Precision differential pressure transmitters ULFA / ULFA Tech series PATM are designed for cleanrooms in semiconductor, display and pharmaceutical facilities. The instruments maintain slight positive pressure differences to ensure sterile air isolation between adjacent zones.

Precision measurement of ultra-low pressure ranges with 0.2% accuracy band
Dual SPDT relay switches configured for cleanroom fan speed automation
Loop-isolated 4-20 mA analog output compatible with building management units
Smooth front faceplate enabling wipe-down cleaning with chemical detergents

Digital pressure gauges for liquids and gases ULFA / ULFA Tech series 750A

Self-powered digital pressure gauges ULFA / ULFA Tech series 750A feature wetted connections fabricated from stainless steel SUS 316. The devices serve hydraulic piping tests, pump discharge monitoring, chiller inspection and leak testing on pressurized vessels.

Wetted connection fittings and diaphragm made of durable stainless SUS 316
Five-digit liquid crystal screen with backlight and 0.25% measurement rating
Battery operation via three standard AAA elements with power level indication
Specialized software features for recording peak values and delta-P metrics

Combined pressure transmitters and switches ULFA / ULFA Tech series SIT

Intelligent monitoring instruments ULFA / ULFA Tech series SIT unite a 4-20 mA pressure transmitter with solid-state relay switching in one compact unit. The instruments mount on compressors, booster pumps and hydraulic manifolds to prevent dangerous overpressure events.

Fluid contact components built from corrosion-resistant alloy steel SUS 316
Four-digit bright LED display for direct numeric viewing of live pressure
Proportional 4-20 mA current output joined with dual SPDT threshold switches
Configurable deadband and switching hysteresis configured via front buttons

Industrial pressure and differential instruments ULFA / ULFA Tech series SDT and SDTD

Heavy-duty industrial transmitters ULFA / ULFA Tech series SDT and SDTD offer liquid crystal indicators and two-wire DC 24V loop-powered design. The products are deployed in standard and explosion-proof environments throughout petrochemical units and municipal water facilities.

Two-wire 24 VDC loop-powered electronics delivering stable 4-20 mA output
High measurement accuracy rating of 0.15% on SDTD differential model units
Four-digit liquid crystal readout with field-selectable engineering units
Explosion-proof enclosure options suited for chemical plant hazard zones

Differential pressure monitoring across air filters and industrial scrubbers

Continuous monitoring of aerodynamic pressure loss across inlet and final ventilation air filters represents an essential condition for flue gas treatment reliability.

Digital differential pressure transmitters ULFA / ULFA Tech series ADT record gaseous flow dynamics with an accuracy tolerance within 0.2%, supplying a 4-20 mA current loop analog reading to central ventilation automation controllers.

Early identification of particulate accumulation on filter media prevents motor overload on blower fans and eliminates unintended ventilation drops in production facilities.

The instruments operate reliably through wide ambient temperature swings and particulate environments within heavy-duty scrubbers.

Positive room pressure control for cleanrooms and operating suites

Within semiconductor fabrication facilities, pharmaceutical plants and hospital operating theaters, maintaining a stable hierarchy of positive air pressure is essential.

Precision differential pressure transmitters ULFA / ULFA Tech series PATM track ultra-low pressure gradients between the clean room environment and adjoining airlock corridors.

When air turbulence occurs or hermetic doors open, the transmitter directs correction commands to air supply dampers through integrated dual SPDT threshold switches.

This prevents unfiltered external airborne dust and particles from penetrating the protected zone, ensuring full adherence to environmental cleanliness regulations.

Process fluid compatibility and corrosion resistance of SUS 316 alloy

When monitoring pressure in liquid thermal loops, industrial water, fluid solutions and technical gases, chemical resilience of wetted connection elements is of paramount concern.

Pressure transmitters and digital gauges ULFA / ULFA Tech series 750A, SIT and SDT are manufactured with wetted threaded fittings and isolating diaphragms machined from austenitic stainless alloy SUS 316.

This metallurgical composition provides high passivity against chlorides, acid traces and cleaning sanitizers, avoiding localized pitting of the sensing element and preventing metallic contamination of high-purity process liquids during extended operational runs.

Configuring dual SPDT relay setpoints and switching deadbands

For dependable protection of booster pumps, blowers and hydraulic skids against dangerous overpressure events, combined sensor-switch units ULFA / ULFA Tech series SIT combine a 4-20 mA analog transmitter with dual electromechanical SPDT relays.

Engineers configure upper and lower trip setpoints directly using tactile buttons on the front panel, while also establishing an optimal switching deadband.

This setup prevents intermittent contact chatter caused by fluid pressure ripples and provides immediate motor shutdown whenever critical operational boundaries are exceeded during plant operation.

Automation loop integration using two-wire 24V current loop transmitters

Interfacing primary pressure transmitters with programmable automation controllers and data acquisition units relies on standardized 4-20 mA current loops. Industrial transmitters ULFA / ULFA Tech series SDT and SDTD utilize a two-wire hookup powered directly from a 24 VDC instrument loop.

This simplifies field wiring requirements and improves electrical noise rejection over distances reaching several hundred meters in areas subject to electromagnetic interference from heavy electric motors.

Differential model SDTD provides 0.15% measurement precision and straightforward integration into SCADA software platforms.

Hydrostatic pressure testing and pneumatic leak detection procedures

During fabrication and periodic re-qualification of fluid piping, heat exchangers and pressure vessels, mandatory hydrostatic and pneumatic tightness evaluations must be executed.

Portable digital pressure gauges ULFA / ULFA Tech series 750A incorporate a Leak Tester routine and automated peak pressure recording mode. The instrument tracks pressure degradation within an isolated test circuit over a pre-programmed testing window and stores extrema inside internal memory.

Triple AAA battery power and backlit display readability provide complete mobility for technicians inspecting remote manifold installations.

ULFA / ULFA Tech 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 ULFA / ULFA Tech and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.