Frequently Asked Questions of 21000-28-10-20-102-01-02

Q: What does the part number “21000-28-10-20-102-01-02” mean?

The “21000” is the base model (aluminum housing). The suffix codes define options such as: type of probe installed (probe with connector, or not), probe type (e.g. 3300 XL 8 mm or 11 mm), cable length, standoff adapter length, probe penetration (sleeve) length, type of conduit fittings/threading,

etc. Hence “28” might correspond to a certain probe‑with‑connector type, “10” to a 1.0 m cable, “20–102” to standoff / sleeve / penetration

 dimensions per Bently’s ordering schema. The final “01-02” typically defines fitting options

and mounting thread type.

Q: Can this housing be used in hazardous / explosive environments?

Yes — the 21000 (and stainless version 24701) housings are available in versions approved by the Canadian Standards Association (CSA)

 for explosion‑proof applications in hazardous areas. When properly ordered (with correct suffix options), they meet CSA Class

 I / II / III (various groups) and enclosure Type 4 requirements.

Q: What temperature and environment can it handle?

With commonly used probes (3300 XL 8 mm or 11 mm), the housing can operate from –51 °C to +177 °C (–60 °F to +351 °F). It is

 constructed of metal and uses O‑rings for sealing, plus threaded ports for conduit — giving good protection against

environmental factors (dust, moisture, mechanical damage) when properly installed.