Thermal Mass Capillary

Information about the Thermal Mass Capillary range

The Capillary Thermal principal of operation is based on heat transfer and the first law of thermodynamics. During operation, process gas enters the instrument’s flow body and it divides into two flow paths. The vast majority of the gas flow passes through the Laminar Flow Element (LFE) bypass. A very small portion of the total flow is diverted through a small ‘Capillary’ sensor tube with an ID between .007 to .028 inches.

The LFE bypass is designed so that the process gas maintains a smooth, uniform flow profile called laminar flow (in other words, the gas has a Reynolds number below 2000). As a result, the small fraction of the total flow measured in the sensor tube remains in direct proportion to the gas flowing through the LFE bypass. By measuring the flow in the sensor tube, the total mass flow rate can be calculated. The instrument is calibrated over its full mass flow range.

Key Features

USB Enabled
Rotary Piston/ Oscillating Piston type flow meter with a single moving part provides robust and low maintenance technology.
Suitable for low & high viscosity liquids at pressure rating up to 4,000 bar (60,000 psi).
Available materials of construction: 316L, Duplex F51(UNS S31803), Super Duplex F53(UNS S32750)/F55(UNS S32760). 6Mo F44(UNS S31254), Hastelloy (UNSN10276) & Titanium.
Connections: NPT, Autoclave, ANSI & API flanges, Grayloc Hubs, Galperti
Hubs, Techlok hubs. More on request.
Communications: 4‐20mA HART, Pulse, MODBUS, Foundation Fieldbus Dependent on electronics and certification requirements.

Technical Specifications red-y compact series

Measuring Ranges
Full scale freely selectable	Body Size ¼ from 0 … 25 in/min ……. Body Size ½ from 0 … 60 in/min …
Performance Data
Media (real gas calibration)	Air, 02*, He, Ar, CO2, ..
Accuracy (Air & equivalents)	Eco: ± 2.0% of full scale Special: ± 1.0% of full

PBC Flow Ranges

The smallest kids on the block – the new LF03 and the LF05, just a fifth and a third of the size of the LF15 with low flow rates to match. From 0.25 ml/min on 10cSt to 30 litres/hour.