Greyline Instruments PDFM 4.0 Portable Doppler Flow Meter Trash Pumps GilAir Plus has the capability

GilAir Plus has the capability of automatically correcting the flow rate for altitude changes to maintain constant flow accuracy of +/- 5% over this barometric pressure range

and manufacturing facilities

An affordable

Three-button operation (no menus) and an on-board operating manual

3 hours at 1/4 load with Eco-Throttle

Greyline Instruments PDFM 4.0 Portable Doppler Flow Meter Trash Pumps GilAir Plus has the capabilityIt's ideal for flow troubleshooting, balancing and checking performance of permanent flow meters. The new PDFM 4. 0 is fast and easy to operate you can mount the sensor on the outside a pipe in less than a minute. Use the built in keypad and calibration menu to set up the flowmeter for your application. The PDFM 4. 0 works on any liquid containing bubbles or solids and is recommended for "difficult liquids" like wastewater, slurries, sludge,