This electronic digital respirometer from Anesthesia Associates has a large LCD screen eliminating the difficulty of reading a dial.  Easily detach the flow sensing unit from the control unit to clean and sterilize.  You can wash, gas sterilize or cold sterilize.  Comes ready to use including 9volt battery and a 22mm female x 22mm female adapter.

Range:	0 - 200 Liters
Measurement Type:	Air/Gas volume flow (tidal volume)
Resolutions:	.02 liter
Flow Rate:	5 lpm minimum/100 lpm maximum
Accuracy	+-5% over range, +- 2% at calibration point
Resistance to flow:	2cm of water at 100 lpm