Monitoring and measuring gas flow is made easy with the Master-Touch Series 8800MP thermal mass flow meters. The insertion style thermal mass flow meter includes a state-of-the-art sensor and probe construction that can be effortlessly and promptly inserted into the gas flow, allowing the flow to effortlessly cascade over the sensor, giving you accurate and reliable evaluations with each use.
The Integral style thermal mass flow meters are incredibly convenient, as they have all the electrical components and internal mechanisms located in a self-contained unit, making it easy to monitor and introduce into your system. You can be certain that the Series 8800 will not only provide you with ease of use but accurate and effective readings.
Our insertion flow meters, from EPI, provide accurate, consistent, and rapid real-time flow measurement with a sensor that is both temperature and pressure corrective. Each flow meter is calibrated using standards traceable to the National Institute of Standards and Technology (NIST).
Master-Touch Series 8800MP HAZ Insertion Flow Meters include a rugged and cleanable thermal mass flow sensor. These units consist of a sensor assembly which utilizes two RTD (Resistance Temperature Detector) sensing elements. The sensors consist of reference grade platinum, ceramic, glass, and stainless steel. Two platinum resistance sensors are built up upon the ceramic substrate and then given a thin glass coating.
The assembly then slips into a stainless-steel sheath for corrosion and abrasion resistance. The sensor assembly is large, rugged, and relatively insensitive to dirt buildup. During operation, the temperature sensor constantly measures the ambient temperature of the gas. This maintains a reference resistance on one side of a bridge circuit. The second sensor undergoes self-heating to a constant temperature above that of the gas stream from control by the temperature sensor and bridge circuitry. Our bridge maintains the overheat temperature and counterbalances the temperature effects through our proprietary temperature compensation techniques.
Insertion style thermal mass flow meters include a sensor and probe assembly that is inserted into the process gas flow conduit to allow the process gas to flow across the flow sensing elements. Our insertion style flow meters are available with 1/2″, 3/4″, or 1″ OD probes. Tube fittings and ball valve retractor assemblies, with or without a mounting flange, are also available from the factory as options. The tube length must be specified upon ordering. For other probe diameters and lengths, please consult the factory.
Integral style thermal mass flow meters have all the electrical components and connections within one enclosure. This enclosure offers ratings for hazardous environments. The enclosure mounts directly to the inline flow section or to the insertion probe assembly at the point of measurement. The enclosure includes all the electrical connections as well as the linearizing electronics and the display/keypad assembly.
Thermal mass insertion flow meters use the principle of convective heat transfer to directly measure mass flow. Our proprietary thermal mass flow sensors use two ratiometrically-matching, reference-grade platinum Resistance Temperature Detectors (RTDs). The platinum sensing element wire is encapsulated in a 316 Stainless Steel sheath or, if specified, a Hastelloy C sheath.
Our microcontroller uses smart sensor technology to preferentially heat one RTD. Meanwhile, the other RTD acts as the temperature reference. The process gas flow dissipates heat from the first RTD, causing an increase in the power necessary to maintain a balance between the RTDs. This increase relates directly to the gas molecular rate of flow. Our sensors are also temperature compensated for a wide process gas temperature range. In addition, they are insensitive to pressure changes, so the output signal is a true mass flow rate signal.
Copyright 2024 © All Rights Reserved Worldwide
