... 2, Maintenance free. 3,Easy installation. 4,Suitable for variable diameter demand . 5, Switching value can be adjusted ... and liquid measurement . Can used for pneumatic and hydraulic systems, flow monitoring for recycled water, cutting fluid and lubricating ... CEnvironment temperature :-20--80°CStorage temperature :-20--100°CConnection :M12 connector /2m cable (option)Material: Probe is stainless steel ...