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Premier Control Technologies Fluid Solutions

Liquid controllers and meters

Liquid flow meters and controllers from Premier Control Technologies utilise patented laminar differential pressure technology to deliver highly accurate, repeatable volumetric fluid tracking and active flow control. Engineered specifically for incompressible process fluids, these microfluidic instruments operate with instant-on performance and zero warm-up delays, ensuring rapid 10–20 ms indication times for fast-moving workflows.

The entire range delivers ±2% full-scale accuracy and a 50:1 turndown ratio, providing secondary digital outputs for live process temperature and line pressure tracking. Available options span inline measurement models, battery-powered portable verification meters, and precise low-to-high flow control valves equipped with front bleed ports for rapid system de-aeration.

Comparing the different meters and cotnrollers

Alicat liquid instruments use patented laminar differential pressure technology for fast, repeatable volumetric measurement and control. Compare the core operational parameters of each series below to select the right device for your process.

Series ModelDevice CategoryFull-Scale Flow RangeResponse TimeOperating PressureKey Feature / Best For
L SeriesInline Flow Meter0.5 ccm to 10 lpm20 msUp to 100 psigContinuous inline measurement of flow rate, temperature, and line pressure with no warm-up time needed.
LB SeriesPortable Flow Meter0.5 ccm to 10 lpm20 msUp to 100 psigRechargeable battery-powered design (up to 18 hours life) for mobile field verification and lab auditing.
LC SeriesLow-Flow Controller0.5 ccm to 500 ccm100 msUp to 100 psigMicro-fluidic control and precise liquid dispensing with accessible PID valve tuning and optional batching firmware.
LCR SeriesHigh-Flow Controller1 lpm to 5 lpm100 msUp to 100 psigHigh-throughput liquid flow control with larger proportional valves for rapid dispensing and process stability.

Our Alicat L/LB/LC/LCR instruments use laminar differential pressure technology to measure and control volumetric liquid flow with instant‑on performance, ±2% FS accuracy, and 50:1 turndown. Choose the L meter for inline monitoring, LB for portable verification, LC for low‑flow control (ccm), or LCR for rapid control and dispensing at 1–10 L/min—all with live temperature and optional pressure readouts, bleed ports for fast de‑aeration, and PLC‑friendly I/O.

We can offer various different analogue input / output signals as well as many digital communications options.

To learn more about the underlying physical equations and laminar flow element design, read our technical article on Laminar Differential Pressure Measurement for Liquids.

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Or if you would prefer to contact us by phone or email to discuss your your liquid flow meter or controller, please call 01953 609930 or email sales@pctflow.com.

Common FAQs for liquid meters & controllers

They use laminar differential pressure across a flow element and compute volumetric flow—ideal for incompressible liquids—while also showing temperature and optional pressure.
Meters (L/LB) cover 0.5 ccm up to 10 L/min. Controllers split into LC (roughly 5–500 ccm) and LCR (about 1–10 L/min).
Meters indicate in around 10–20 ms; controllers achieve control responses from ~30–100 ms, depending on setup.
For liquids, Alicat reports volumetric flow (mass isn’t required for incompressible media). Pressure and temperature are shown for context and diagnostics.
Typical accuracy is ±2% of full scale with ~50:1 turndown across the series.
Analogue outputs plus RS 232/RS 485/Modbus are standard; EtherNet/IP, EtherCAT, PROFIBUS/PROFINET and others are optional.
Yes—ATEX/CSA Zone 2/Class I Div 2 options are available for meters and controllers.
Yes—front bleed ports help remove trapped air, reducing start up errors.
Functionally both are liquid controllers; LC addresses low flows (ccm range), while LCR targets higher flows (L/min) with matching valve hardware.

Help and advice

A member of our team will be happy to assist with any questions you may have.

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