When radiation measurements are made, a beam of cesium-137 - or cobalt-60 - isotopes emits gamma rays. A special sensor mounted on the opposite side of the container receives radiation. The sensor's scintillator converts gamma rays into signals, the amount of which is measured and analyzed. Because the gamma rays are attenuated as they pass through the material, the sensor can calculate level, limiting level, density, or material flow from the intensity of the incoming rays.
Technical data
Measuring range 1... 7 m (3.28... 22.97ft)
Repeatability at -20 ℃... ±0.5 % at +50 ℃ (-4 ℉... +122 ℉)
Ambient, storage and transportation temperature -20 ℃... +50 ℃ (-4 ℉... +122 ℉) has an expanded range available
Power supply
Operating voltage 20... 72 V DC; 20... 253 V AC, 50/60 Hz
High consumption power 4 W; 6 VA
Analog input port
Input port properties 4... 20 mA passive
Internal load 250 Ω
Switch input port
Input port property
10 mA Ʋ Open Collector
100 mA Ʋ relay contact
Relay outlet
The switching voltage is low 10 mV, high 253 V AC, 253 V DC
The commutation current is low 10 μA, high 3 A AC, 1 A DC
Switching power is small 50 mW, large 750 VA AC, 40 W DC
Current output
Range 4... 20 mA/HART, active or passive
High load 500 Ω (300 Ω when using self-safe IS)
Switch outlet
Outlet type NPN transistor outlet (non-potential)
Switching voltage < 55 V DC
Load current < 400 mA
Weight 4.5kg (10lbs) + 0.0027kg /mm
(0.005952 lbs/mm)
SIL certification is optional to SIL2
Materials/scintillators
The detector tube is made of galvanized steel with Sandopine rubber coating. Polystyrene is used as a scintillation material.
Shell type
The case is made of aluminum or stainless steel as a two-cavity type and is protected up to IP 66/IP 67.
