Bently Nevada 107770-04-02 Velocity Transducer Housing CENELEC Approved

107770-04-02: A CENELEC Zone 1 Velocity Transducer Housing

This is a velocity transducer housing assembly rather than a bare sensor: it comes with a 330500 Velomitor sensor and a 21128 housing preinstalled. That combination is what makes it a drop-in assembly rather than a part that has to be built up from components.

The hazardous area rating is the specification that defines where it can be used: CENELEC Zone 1, Group IIC. Zone 1 is the higher of the two zone classifications — it covers gas atmospheres where an explosive concentration is likely in normal operation — and Group IIC covers the most demanding gas group. A transducer that carries this rating is accepted in a Zone 1 installation; one that does not, is not.

Decoded Configuration

Decoded against the published configuration data: 04 = mounting thread option, 1/2-14 BSP. 02 = cable exit fitting option, 1/2-14 NPT explosion-proof. Preinstalled components are the 330500 Velomitor sensor and the 21128 housing.

The cable exit fitting being explosion-proof is part of the Zone 1 rating rather than a convenience — in a Zone 1 area the cable entry has to maintain the enclosure integrity that the rating is certified against.

107770 Velocity Transducer Housing Variants

The 107770 family differs in mounting thread and cable exit fitting, which are the two decisions that determine whether the housing fits the mount and the cable entry:

All Bently Nevada parts · Sensors & Instrumentation

RoHS and ATEX/IECEx in the Same Assembly

The assembly is compliant with the RoHS Directive 2011/65/EU and carries ATEX/IECEx approval alongside the CENELEC marking. Those are separate approval frameworks covering the same hazard protection goal, and an installation may be specified against either depending on the jurisdiction and the equipment schedule.

Confirm which framework the installation is certified to before ordering — a part that satisfies one does not automatically satisfy the other in the eyes of the equipment register.

Why Assembly-Level Ordering Matters Here

Ordering a preinstalled assembly rather than a sensor plus housing changes the risk profile of the replacement. The factory-set relationship between the transducer and its housing is what the hazardous area certification is defined against; assembling it in the field from separate components moves that responsibility onto the installer and outside the certification.

Supply & terms: Stock status: In Stock · Condition: New · Warranty: One Year · Origin: US. Listed by AutoDCS Tech Parts Team · Last updated 2026-10-07.

Bently Nevada brand hub