Pressure instruments measure conditions in process lines, monitor differences between two points and record atmospheric pressure. SL Measurement supplies pressure transmitters, differential pressure sensors, chart recorders and barometers for industrial and environmental measurement.
Start by identifying what you need to measure: line pressure, room or filter differential pressure, atmospheric pressure, or contact pressure between surfaces. Each requires a different measurement arrangement.
Process pressure transmitters
Pressure transmitters convert measurements into electrical signals for controllers, indicators and data acquisition systems. Select the pressure range, wetted materials and process connection to suit the liquid or gas being measured.
Wahl SS and CS pressure transmitters — silicon and ceramic sensor options, with current or voltage outputs depending on the selected configuration.
Wahl DP differential pressure transmitters — measure pressure differences between two points in compatible gas or liquid systems, including filter pressure-drop applications.
Low differential pressure for rooms and HVAC
Room pressure and ventilation measurements often involve small differences measured in pascals. Match the sensor range to normal operating conditions and expected excursions, and check the air quality reaching the sensing ports.
Evikon E2418-DF differential pressure transmitter — measures low pressure differences in dry, clean air, with analogue outputs and RS485 Modbus RTU for connection to monitoring or building management systems.
Monnit ALTA wireless differential pressure sensor — measures the difference between two pressure ports and transmits readings to iMonnit. Confirm the gateway and platform requirements for your installation.
Pressure chart recorders
Chart recorders provide a visible paper history of pressure changes. Choose the pressure range, chart diameter and recording period, then confirm the connection and matching chart paper.
Electronic monitoring suits applications requiring measurement history, local alarms or remote access. Confirm the sensor range, data retrieval method and any software subscription needed.
Dickson TWP touchscreen data logger — supports differential pressure monitoring with a compatible sensor, local readings and audible and visual alarms. DicksonOne remote features require the appropriate subscription.
Barometers and atmospheric pressure recorders
Barometers measure atmospheric pressure for observations, testing and environmental records. Choose a digital display for direct readings or a barograph for a continuous paper trace.
Sato SK-500B digital barometer — displays atmospheric pressure and provides RS-232C communication for compatible PC recording or an optional printer.
Contact pressure describes loading between surfaces, such as rollers, press platens and gaskets. Pressure-sensitive film helps reveal the contact pattern and uneven loading.
FUJIFILM Prescale pressure measurement film — produces a coloured impression where pressure is applied. Select the film grade according to expected pressure, temperature, humidity and loading duration.
Selecting the right pressure instrument
Pressure type: Gauge, absolute, differential, atmospheric or surface contact pressure.
Range: Normal operating pressure, maximum pressure and possible pressure surges.
Medium: Air, gas or liquid, including temperature and material compatibility.
Installation: Process thread, pressure tubing, mounting position and available space.
Results: Local display, paper chart, electronic records, alarms or an output to another system.
Discuss your pressure measurement
Send the application, required pressure range, measured medium and connection details. For replacements, include a nameplate photograph and the full model code. Identify any separate sensor, tubing or recording consumables required.
Record pressure changes on paper with Dickson PW4 and PW8 pressure chart recorders. Choose a compact 4-inch recorder or a larger 8-inch chart format to suit your installation and recording requirements.
Pressure ranges: Models covering 0–100, 0–200, 0–300, 0–500 or 0–1000 psi, depending on the series.
Recording periods: 24-hour or 7-day operation, depending on the model.
Local recording: Battery-powered chart drive with a visible paper trace.
Selection: Match the pressure range, recording period, connection and chart reference before ordering.
Keep a paper record of atmospheric pressure with the Sato NSII-BQ Sigma II barograph (7237-00). An aneroid bellows moves the recording pen as pressure changes, producing a visible trace on a rotating chart.
Pressure range: 940–1045 hPa with 1 hPa chart graduations.
Recording periods: 7-day or 32-day operation as specified in the current manual.
Quartz chart drive: Powered by two C-size batteries.
Paper records: Supplied with 55 sheets of 7-day chart paper; replacement charts and cartridge pens are available separately.
Observe atmospheric pressure and room temperature with the Sato 7610-20 Baromex aneroid barometer. Its analogue dial includes a reference pointer for comparing pressure changes, while the integrated glass thermometer provides a local temperature reading.
Pressure measurement: 930–1070 hPa with an additional mmHg scale.
Temperature measurement: -10 to 50°C.
Reference pointer: Mark an earlier pressure reading to see whether pressure has risen or fallen.
Construction: Brass case with glass front, suitable for indoor wall or tabletop placement.
Reveal contact pressure and uneven loading with FUJIFILM Prescale pressure measurement film. The film develops a red impression where pressure is applied, helping you inspect the contact pattern between mating surfaces.
Pressure range: Nine standard grades covering 0.006–300 MPa.
Record pressure changes over time with Dickson PR125, PR325 and PR525 pressure data loggers. The battery-powered display models store readings at the measurement point for later download and review.
The Sato Baromex 7612-00 barometer with digital thermometer combines an atmospheric-pressure dial with a numerical room-temperature display. Its adjustable reference pointer helps you see whether pressure has risen or fallen since the previous observation.
Pressure range: 945–1045 hPa, with an additional mmHg scale.
Temperature range: 0–50°C with 0.1°C display resolution.
The Sato SK-500B digital barometer measures atmospheric pressure for laboratory observations, testing and environmental records. Read pressure directly on the desktop display or connect a compatible PC to graph and save measurements.
Model: SK-500B, catalogue number 7630-00.
Measuring range: 600.00–1100.00 hPa with 0.01 hPa display resolution.
Measurement functions: Maximum, minimum, moving average and relative value.
Data connection: RS-232C output for PC recording or an optional dedicated printer.
Alarms: Independently adjustable upper and lower limits with external alarm contact outputs.
Monnit ALTA Wireless PSIG Pressure Meter measures pressure in a gas, liquid or vapor supply line and transmits the pressure measurement to iMonnit. This solution combines a standard pressure transducer interfaced to a Monnit ALTA wireless radio.
- Measure pressure with 50 or 300 PSIG transducers (others available upon request) - Measure non-caustic liquid or vapor pressures - Pressure transducer is NEMA 4X (IP66), CE Rated
The Dickson TWP touchscreen data logger displays readings and measurement history on an 8-inch colour screen. Configure it for temperature, humidity or differential pressure monitoring using compatible replaceable sensors.
Local monitoring: Touchscreen display with audible and visual alarms.
Data access: USB download and Wi-Fi/Ethernet connectivity.
Remote monitoring: DicksonOne cloud access and notification features require the appropriate subscription.
The Palmer Wahl 524 differential pressure chart recorder produces a paper record for reviewing filter pressure drop and suitable flow or liquid-level measurement systems. Optional pens allow static pressure and temperature to be recorded alongside differential pressure.
Chart size: 12-inch circular chart with pipestand mounting.
DP ranges: Select from 0–20, 0–50, 0–100, 0–200, 0–300 or 0–400 inches of water.
Recording channels: One differential-pressure pen, with optional static-pressure and temperature pens.
Chart drive: PC-11 battery-operated multi-speed drive as standard.
Construction: Mechanical dual-bellows measurement system in a powder-coated aluminium case.
Palmer Wahl pressure and temperature chart recorders provide a paper record of measurements over time. Choose an 8-inch or 12-inch recorder with an aluminium or Pelican® case, configured for pressure, temperature or combined recording.
Recording options: Up to three pens, depending on configuration.
Chart drives: Battery-operated, with spring-wound and electric options available.
Installation: Portable and fixed-mount configurations.
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