Ground Water Instruments

Micro-Flo Low Flow Purge Bladder Pump

The Micro-Flo System low flow methodology makes use of the bladder pump with specific objectives: Purge at low rate, ranging from 200 to 500ml per minute; monitor static water level during purging to maintain constant level; monitor water parameters - pH, Temperature, conductivity, DO, turbidity, etc. Once specific target parameters stabilize, acquire the sample by reducing the pump flow rate to 100ml per minute. By adopting the low flow methodology over conventional methods, a more representative sample can be acquired in less time. The amount of purge water that must be disposed is significantly reduced. This adds up to significant savings in the cost associated with operating a sampling system. Available in Stainless Steel & Teflon or PVC & Teflon models, the Micro-Flo can be installed in 2" and larger monitoring wells. It can withstands 200 psi operation (400 feet installation depth) and is easily adjustable to meet purging standards of 200 to 500 ml/min and consistently delivers 100 ml/min sampling rate without agitation. A choice of a 12 VDC or fully pneumatic pump cycle controller is available to manage the compressed air used to power pneumatic pumps. Enclosed in a rugged, environmentally sealed, shock resistant case they are designed with large air paths so as not to restrict the air flow as it moves from the compressed air source to the pump. Sensitive air flow control permits high purging rates and low (less than 100ml/ min.) sample rates and double acting option permits operation of two pumps simultaneously, without requiring an external manifold.