Retractex B Retractable sensor housing

The Retractex B is a manual or pneumatic retractable housing designed for sanitary applications in biotechnology, food and beverage, and pharmaceutical applications with process pressures up to 16 bar. The patented HyCIP design uses the Ingold socket as the cleaning chamber ensuring superior cleaning.

The compact design with a stroke of only 36 mm keeps wear on seals to a minimum and creates excellent reliability – day and night, all year long. It can be cleaned easily and thoroughly in place, including the space between the socket and rinsing chamber. It is designed for 225 mm long sensors with 12 mm shaft diameter and is equipped with several safety features (e.g. no sensor – no insertion, window to check seals for leakage etc.) to provide operator safety. It is available with various process connections and sealing materials.

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General Specifications

(For full specifications see the resources section below)

Wetted Parts Stainless Steel 1.4404
Pressure Range (bar g) 0 to 16 bar (< 120 °C), 10 bar (120 to 140 °C)
Operating Temperature Range -10 – 140 °C
For Sensors with 12 mm; PG13,5; 225 mm
Surface Quality of Steel Ra < 0.8 μm (N6)
ATEX approval

CE 0035 II 1/2 G Ex ia IIC T4/T5/T6 Ga/Gb
CE 0035 II 1/2 D Ex ia IIIC T x °C Da/Db

IECExCE 0035 II 1/2 G Ex ia IIC T4/T5/T6 Ga/Gb

CE 0035 II 1/2 D Ex ia IIIC T x °C Da/Db

HyCIP Process Connections

The Retractex B has a unique cleaning option called HyCIP for G 1¼" sockets found in hygienic processes.

When retracted, the sensor can be cleaned and sterilized together with all external wetted seals. The cleaning solution is directed between housing and socket then up to the process seal. This ensures that the most remote parts of the chamber are rinsed. HyCIP housings are unmatched for their cleaning performance of the sensor and of all relevant seals.

HyCIP process connections are designed with o-ring positions at 25, 50 and 55 mm to match most weld-in sockets on the market.

Retractex B Schema

Specific Applications


Hamilton's knowledge base provides a range of explanatory articles, frequently asked questions, and document downloads.
  • Catalog - Process Analytics

    Download the Process Analytics sensor catalog to learn about the complete offering of Hamilton process sensors and accessories.
  • Brochure - BioPharma

    Innovative solutions for process analytics in biotechnological and pharmaceutical industries.
  • Brochure - Brewery

    Learn about our control and analytical solutions that are essential to the brewing process.
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