Shenhai Explosion-Proof
Gb: Specifies protection levels for Category 1 and 2 devices. Importantly, the updated explosion-proof markings further divide the flameproof category into da, db, and dc.
| III | C | T 135℃ | Db | IP65 |
|---|---|---|---|---|
| III Surface dust | T1 450℃ | Ma | IP65 | |
| T2 300℃ | Mb | |||
| T3 200℃ | ||||
| A Flammable flying flocs | Da | |||
| T4 135℃ | ||||
| Db | ||||
| B Non conductive dust | T2 100℃ | Dc | ||
| C Conductive dust | T6 85℃ |
da:
Designed exclusively for catalytic sensors in combustible gas detectors, and is approved for use in Zone 0.
db:
A prevalent standard, db denotes the conventional flameproof type.
dc:
Intended for use with switch contacts and EX components within electrical devices.