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General information
1.1 Description
The measuring inserts of the BMM series presented here are designed for installation in a protective fitting, e.g. B+E product group “TEM”. They essentially comply with the DIN 43735 standard for measuring inserts, but many variants exceed the scope of the standard. However, if the insert is to be used without a protective fitting, e.g. for laboratory purposes, no explosion protection is possible.The measuring inserts are made of mineral-insulated sheathed cable and are therefore robust and
highly vibration-resistant.A spring-loaded bearing ensures better heat transfer, reduces vibrations of the measuring insert and compensates for thermal expansion.
highly vibration-resistant.A spring-loaded bearing ensures better heat transfer, reduces vibrations of the measuring insert and compensates for thermal expansion.
1.2. Type overview
The types are categorized according to the type of electrical connection and the sensor type. The respective combination determines the type.
Types:
BMM130 – Ceramic terminal block with screw terminals
BMM230 – free wire ends and flange plate for mounting a transmitter
BMM330 – Permanently mounted transmitter
Sensors (= type suffix):
T – thermocouples
W – resistance thermometers
Types:
BMM130T/BMM130W; BMM230T/BMM230W; BMM330T/BMM330W
Explosion-proof versions are given an index depending on the type of protection:
- iA – Ex i (intrinsically safe)
- ec – (non-sparking) (previously nA)
- d – Ex d (pressure-resistant enclosure)
1.3. Structure
- Standardized sensors (IEC 60751 platinum resistance thermometers, IEC 60584 thermocouples, international standards such as ASTM, Gost, JIS)
- B+E-Form 0 of sheathed cable; sheath of austenitic steel or highly heat-resistant alloys; insulator of highly compressed magnesium oxide
- Single, double and triple sensors possible
- Suspension travel (ST) 10 mm
Do you have any questions?
Böhme + Ewert GmbH’s application technology department will be happy to provide you with further advice.