Keep an eye on cooling water with the KONTES® Flow-Watchman™, a device designed for the visual indication of liquid flow

Lightweight all-plastic construction is molded of clear polycarbonate with an inert nylon indicator ball that operates in any position and requires no auxiliary support. Usable with water down to a flow range of approximately 100mL/minute, which is adequate for even the smallest cold finger condensers. The upper flow limit is in excess of 1L/minute. Flow indication is visible from a distance.