Density Meter LB 444 SECTION 7. TECHNICAL DATA
79
7.2 Detector
The probe is designed for industrial application. It includes a scintillation counter
for Gamma radiation, which is equipped with a NaI crystal. The built-in micro-
processor tracks the configuration, counts the pulse rates, controls the high volt-
age, measures the temperature of the probe and an external Pt 100, transfers
data and performs calibration and control functions. Power supply and commu-
nication take place via 2-wire technology. The probe is ex-protected and is li-
censed for:
Protection type EEx de IIc T6 / EEx de [ib] II C / IP 65, stainless steel housing.
Cable entrance: PG 7 for external cable diameters 4 .. 6.5 mm.
Scintillators:
NaI (Tl) crystal
Size: (diameter/length)
25/25 mm, 40/35 mm, 50/50 mm, 44/5 mm.
Stability: ± 0.1 %
HV generation:
Voltage range control 500 V to 1500 V
Pt 100 input:
Measurement of product temperature
2-wire connection terminals, ex protection,
zero adjustment via software
Temperature range: -20 to +200°C
Temperature
measurement probe:
via NTC, measuring range -30 to +80°C
Accuracy: ±3°C
Temperature range:
Operating temperature:
-30 to +50°C. A water-cooling device is available for higher tem-
peratures.
Monitoring of detector temperature and alarm when exceeding the
max. permissible temperature.
Storage temperature:
-50 to +70°C.
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