Rosemount Analytical Hx338+ Specifications
Hx338+
LIQ-PDS-Hx338+
Rosemount™ Hx338+
Steam Sterilizable and Autoclavable Pre-Pressurized pH Sensor
Product Data Sheet
Rev BA, October 2017
A pre-pressurized sensor for high performance sanitary pH measurements
The maintenance-free Rosemount Hx338+ pH sensor is ideal for pharmaceutical, chemical, and biotechnology industry applications
where autoclaving, steam-in-place (SIP), and clean-in-place (CIP) procedures occur frequently.
October 2017Hx338+
A robust sensor design
J Able to withstand autoclaving, steam-in-place, and clean-in-
place procedures.
J Maximum operating temperature up to 140 °C (284 °F).
J Maximum pressure up to 6 bar.
J Available in 120 mm (4.7 in.) insertion length.
J Pre-pressurized reference electrode prevents clogging of
diaphragm junction.
Ease of installation
J Eliminate cable twisting with Variopol (VP6) cable connection
for quick cable-to-sensor release.
Contents
Ordering information........ ................................................................................................................................................................3
Specications........ ............................................................................................................................................................................3
Dimensional drawings........ ...............................................................................................................................................................5
Accessories........................................................................................................................................................................................6
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October 2017 Hx338+
Ordering information
The Rosemount Hx338+ pH sensor features a pre-pressurized electrolyte and integral Pt-100
RTD for temperature compensation. These sensors come with a VP6 cable connection and are
compatible with VP8 mating cables. Variopol cables sold separately (see Accessories).
Table 1 -Rosemount Hx338+ pH Sensor Ordering Information
Model Sensor type
Hx338+ pH sensor
Sensor length
01 120 mm (4.7 in.)
Cable connection
72 Pt-100 RTD with Variopol (VP6) connector (requires accessory mating cable)
Typical model number: Hx338+-01-72
Specifications
Rosemount Hx338+ pH Sensor
Measuring method: Combination electrode; pH potential measured against reference electrode
Range: 0 to 14 pH
Sensitivity: 57 to 59 mV/pH at 25 °C (77 °F)
Wetted materials: Glass, EPDM (FDA Approved)
Operating temperature range: 0 to 140 °C (32 to 284 °F)
Pressure range: 0 to 6 bar
Minimum conductivity of sample: 100 µS/cm
Temperature sensor: Pt-100
Diameter: 12 mm (.5 in.)
Process connection: PG 13.5
Compatible transmitters: All Rosemount pH transmitters
Shelf life: Standard is 1 year from manufacturing date. Follow refresh procedure in Quick Start guide at 1 year and 18 months to
extend shelf life to a maximum of 2 years.
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