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Nuclear Density Meter

1.Product Function
Trickle suction, trapping suction, bucket wheel dredger during the construction of mud pipe conveying medium (muddy water mixture) density (concentration) measurement


2.Product Features
1, high standard radiation protection: any working conditions, containing the source equipment up to 5cm surface, the use of 60Co radioactive sources, protection standards for the radiation dose is not greater than 5μSv / h; if the use of 137Cs radioactive sources, radiation protection standards for the radiation dose is not greater than 2.5μSv / h;

2, the standard of measurement accuracy is high; in the range of working life of radioactive source, the ratio of fresh water counting rate to local counting rate is higher than (inner diameter of mud discharging tube / 700) * 150;
3, long working life of radioactive sources; the use of 60Co radioactive sources, working life standards for 20 to 25 years; the use of 137Cs radioactive sources, the standard working life of 30 years
4, involving low intensity of maintenance work: a special high wear-resistant lining lined pipe to improve the emission efficiency of radioactive sources and working life, reduce the source of sludge discharge pipe repair work;
5, modular structure, convenient and safe maintenance.


3. Product Composition
Equipment consists of two parts, namely: sensor components, the host.

CWLL/CWBGS Nuclear density meter host and detector

 

4.Technical Parameters

 

Parameter item

Parameter

Remarks

Measuring range

1.0~1.6 g/cm3(Adjustable maximum)

 

Measurement accuracy

1% 

Depending on the radioactive source configuration

Host (secondary instrument) power supply

220VAC

 

Host (secondary instrument) signal output

4~20mA

 

Host (secondary instrument) power output

±12VDC

 

Sensor power supply

±12VDC

The connection between the sensor and the host is a four-wire system

Sensor and the host (secondary instrument) communication distance

No greater than1000m

 

Sensor protection rating

IP65

 

Radioactive source selection

Proposal: the mud pipe diameter of not less than 850, choose 60Co;
Sludge pipe diameter less than 850, the choice of 137Cs;

 

Radioactive source design working life

Recommendation: 60Co for 20 to 25 years;
137Cs for 30 years;

 

Radiation protection standards

Source-containing device (sensor assembly) up to 5 cm at surface:
Using 60Co, radiation dose not more than 5μSv / h;
Using 137Cs, radiation dose not more than 2.5 μSv / h;