Solinst 9200 RRL5 Radio Telemetry Assembly Frequency:2.4 GHz The Seametrics PT12-BV is a

The Seametrics PT12-BV is a barometric box logger built to compensate absolute-range PT12 pressure sensors for changes in atmospheric pressure

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and operates from -40°C to +54°C on 12-35VDC (2W max)

It also measures vacuum pressure directly

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Solinst 9200 RRL5 Radio Telemetry Assembly Frequency:2.4 GHz The Seametrics PT12-BV is aThe Solinst 9200 RRL 5 is a self contained radio telemetry unit sized to fit inside a standard 2" well casing. It connects to one Levelogger series datalogger (or two via an optional splitter cable) through a reader cable, pulling readings at a set sampling interval and storing them in its own memory. At a separate reporting interval, it transmits the data by short range, unlicensed band radio to a "Home Station" another RRL 5 unit connected by USB to