PF3W is a digital flow sensor that constantly monitors water or coolant flow. The -U variation features PVC piping for additional compatibility with deionized water and liquid chemicals. This is the remote version of PF3W7-U, without a display. One analog output is available. Options include a mounting bracket and M8 lead wire. This version does not offer a flow adjustment valve or temperature sensor. PF3W is grease-free, IP65 rated, and C-UL-US, CE and RoHS compliant.