PendoTECH - Flow Sensors


Welcome to Disposable Rotary Flow Sensors and Flow Meters page. The Disposable Rotary Flow Meters offered by PendoTECH can conveniently measure flow in your process both accurately and cost effectively. They are the perfect alternative low-cost solution for use with tubing and bioprocess containers to the existing re-usable rotary flow meters on the market. They are perfect for filtration processes, chromatography and more. Even though they are called single use, they are also suitable for repeat or long-term use. They are available in a variety of sizes and different materials to insure process compatibility and scalability. The tubing slides over the hose barb on the rotor and may be affixed with a cable tie or a more secure method. The reusable flow sensor electronics connect to a flow monitor by a 3 foot (1 meter) electrical cable. Suitable monitors include the PendoTECH Flow Monitor, a PendoTECH PressureMAT-PLUS, or a PendoTECH Process Control System or other qualified 3rd party monitors. How it Works and Connection to Monitors. The flow sensor works by measuring the rotations of the rotor that is in the flow path. The rotor rotates on a ruby bearing and is the only moving part. The rotor blades reflect an infrared light beam and each rotation measured is converted to an electrical pulse that is received by the flow monitor which has a “pulse accumulator” that counts the pulses. The rotations per second are converted to volume/minute by a factor called the pulse constant. The pulse constant is different for each rotor size and standard values are available. For best accuracy with fluids of viscosity much different than water, the pulse constant can be easily calculated by measuring a known volume and setting the monitor to count the pulses. The pulse constant is then calculated by the pulse counted divided by the volume. (See the schematic below.)		TECHNICAL DOWNLOADS Flow Meter Specification Sheet

	Sensor Features Available with hose barb fittings from ¼ to ¾ inch and a flow range of 30 mL/min to 38 L/min Can be used to measure total flow in addition to flow rate Can be gamma irraditated with tubing and bag assemblies 1% accuracy Wide operating range (-20 to 80C) Fluid path materials meet USP Class VI Maybe be autoclaved to 140C

Flow Monitor

The PendoTECH Flow Monitor is a high quality, reliable microcomputer-based process instrument. It has been designed to provide precise liquid measurement, value monitoring, & data communication for a variety of applications. It also has the ability to measure totalized volume in addition to present flow rate. This can use useful in applications such as filtration and diafiltration and can be used an alternative to a scale to measure total flow.
Monitor - The total fluid pulse constant is permanently saved in non-volatile memory. Users can access all the function of the unit through the menu-driven integrated keypad and LCD. Multicolored front panel LED’s indicate the status. There is
on-board audio annunciation for alarms and keypad key activation.
Transmitter - Data can be collection to a PC via the
RS-232C serial port via the unit report feature where monitored information can be sent based on alarms, service time or set schedule schedules. The 4-20mA output can be used to integrate the unit to a process control system such as a PLC
or DeltaV. Medical- style input and output connector plugs
and shielded cables are used to enhance operating reliability
and eliminate ambient noise from affecting measurements.

ORDERING INFORMATION

Rotors:

PDKT-FM-22WV ... Single Use Rotary Flow Meter, non-sterile, PVDF, 0.25 inch hose barb *

PDKT-FM-23WV ... Single Use Rotary Flow Meter, non-sterile, PVDF, 0.5 inch hose barb *

PDKT-FM-24WV ... Single Use Rotary Flow Meter, non-sterile, PVDF, 0.75 inch hose barb

* as a special order V is replaced by a T, also available in PFA-Teflon^®

Electronic Assemblies (each comes with one rotor):

PDKT-FM-22WV-E ... Electronic assembly for PVDF rotor with 0.25 inch hose barb, 3 foot cable

PDKT-FM-23WV-E... Electronic assembly for PVDF rotor with 0.5 inch hose barb, 3 foot cable

PDKT-FM-24WV-E ... Electronic assembly for PVDF rotor with 0.75 inch hose barb, 3 foot cable

Monitor and Accessories:

FMT1... PendoTECH Flow Meter Monitor, Transmitter for 1 flow meter with 4-20mA and RS232 output

FMT-RS232... RS232 output cable for PendoTECH Flow Meter Monitor

FMT-ANALOG... 4-20mA output connector cable

Please contact us at request@pendotech.com for more information.

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