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11 Supplement
MINITRAC 31 • Foundation Fieldbus
41782-EN-211203
11 Supplement
11.1 Technical data
Note for approved instruments
The technical data in the respective safety instructions which are included in delivery are valid for
approved instruments (e.g. with Ex approval). These data can differ from the data listed herein, for
example regarding the process conditions or the voltage supply.
All approval documents can be downloaded from our homepage.
General data
316L corresponds to 1.4404 or 1.4435
Materials, non-wetted parts
Ʋ Scintillation material
NaI (sodium iodide)
Ʋ Aluminium die-cast housing
Aluminium die-casting AlSi10Mg, powder-coated (Basis:
Polyester)
Ʋ Stainless steel housing
316L
Ʋ Seal between housing and housing lid NBR (stainless steel housing, investment casting),
silicone (Aluminium housing)
Ʋ Inspection window in housing cover
(optional)
Polycarbonate or glass
Ʋ Ground terminal
316L
Ʋ Cable gland
PA, stainless steel, brass
Ʋ Sealing, cable gland
NBR
Ʋ Blind plug, cable gland
PA, stainless steel
Process fittings
Ʋ Fastening lugs
ø 9 mm (0.35 in), hole centre distance 119 mm (4.69 in)
Weight
Ʋ Aluminium housing, with electronics
4.1 kg (9 lbs)
Ʋ Stainless steel housing, with electron-
ics
9.1 kg (20.1 lbs)
Ʋ Maximum total weight, incl. accessory 72 kg (158 lbs)
Max. torque, mounting screws
Ʋ Fastening lugs in the sensor housing 15 Nm (11.1 lbf ft), stainless steel A4-70
Max. torque for NPT cable glands and Conduit tubes
Ʋ Aluminium/Stainless steel housing
50 Nm (36.88 lbf ft)
Input variable
Measured variable
The measured variable is the intensity of the gamma ra-
diation of an isotope. If the radiation intensity decreases,
e.g. due to increasing product density, the measured
value of MINITRAC 31 changes in proportion to the
density.
Analogue input
Ʋ Input type
4 … 20 mA, passive
