Delmhorst RH/TK/75 (75%) Relative Humidity Test Kit Base UOM:EACH Is the O-ring definitely included

Is the O-ring definitely included

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10-30 INCHES OF MERCURY

Delmhorst RH/TK/75 (75%) Relative Humidity Test Kit Base UOM:EACH Is the O-ring definitely includedSalt solution test kit for checking humidity sensor accuracy at 75 per cent A sealed bottle in which a saturated salt solution holds the air at a known relative humidity, for verifying a sensor at the upper end of the range. Fitment Checks the RH T S1 ambient sensor Checks the RH T S3 in situ sensor Specifications Part number RH TK 75 Nominal humidity 75% RH, + as stated by Delmhorst Method Saturated salt solution in a sealed bottle The high end is