Vintage Puritan pressure-compensated flowmeter (Series B).

Vintage Puritan Pressure Compensated Series A Flowmeter - Untested

BPC 10 LPM Oxygen Flowmeter Max Flow 10 LPM Back-Pressure Compensated penox

Meco Series B 596,605 Pressure Compensated Flow Meter T-635

Western Enterprises pressure-compensated O2 flowmeter

Flow Meter LZB-6M Oygen Meter 0-1.5 LPM Flowmeter with Control for Detect Oygen

1/4" Quick Connect Water Flow Sensor Food-Grade Switch Hall Effect Flowmeter ...

NEW DWYER MINI-MASTER FLOWMETER RANGE 1-10 SCFH AIR SER MMA, MMA-5 BRAND NEW