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.