Home › Forums › Environmental Sensors › HYDROS 21 no longer vented… any idea when this changed? › Reply To: HYDROS 21 no longer vented… any idea when this changed?
Differential pressure measurement referenced to atmospheric pressure so no external pressure sensor is needed
See attached screenshot. The Generation 2 integrators guide also has this exact same wording, and the Gen 2 sensor I currently have in my hand right now has the vent. So I think they simply forgot to install the vent on the sensor you have because there is no design change regarding the requirement of a vent at the logger-end of the cable. Their website brochure is written in a way to promote the fact that you don’t need a separate barometric pressure logger like you might if you bought a standalone submersible logger that has no atmospheric reference. Contact Meter Group and send them a photo of your sensor, and then let us know what they say.