Dial flowmeters Unique features - Durable. The lack of a flow tube and the durable metal body prevent all types of breakage problems associated with standard flowmeters. - Compact. The compact size makes the unit fit into tight headwall areas. It is practically damage-proof when other equipment is installed. - Accurate. Accuracy is ascertained at every flow setting without the need for a visible float as in Thorpe tube flowmeters. - User-friendly. The knurled flow adjustment knob and the big easy-to-read numbers make flow adjustment easy. - Flexible. The unit is accessible for headwall outlets and ceiling mount drops. It is offered in two flow range types: .5-15 lpm with flush and 1-25 lpm (both exist in oxygen and air).