1. Professional lightweight metrology: The lightweight load microcomputer nuclear scale uses the isotope americium (241Am) radioactive source, which has low radiation energy, a radiation energy of 60KeV, and a half-life of up to 426 years, suitable for the metrology of lightweight bulk materials; The ordinary load type microcomputer nuclear scale uses isotope cesium (137Cs) as the radiation source. The cesium source has a high radiation energy of 662KeV and a half-life of 30 years. It is usually suitable for measuring ordinary bulk materials with a load of 5kg/m or more (such as ore, coal, clay, salt, sugarcane, grain, etc.);
2. Low maintenance and repair requirements: Low energy source americium (241Am) radioactive source is selected for the gamma radiation source, with a half-life of up to 426 years. The gamma detector (ionization chamber) is not affected by external environmental conditions, with a long service life and no aging problems. Therefore, the entire system has high stability, low failure rate, and low maintenance and repair workload;
3. Easy and fast installation: The system equipment and scale body structure are simple, small in size, and easy to install, without the need for dedicated belt conveyors or special installation space. They can be directly installed on existing conveyors, occupying almost no installation space. Therefore, installation is convenient and easy to implement the design, construction, and technical transformation of new production lines and old production lines;
4. Long term stability is good: non-contact weighing, not affected by factors such as temperature, humidity, dust, corrosiveness, etc. in the working environment; There are no high requirements for the quality of the belt, and it is not affected by factors such as belt inclination angle (which can be directly measured at larger inclination angles), tension, vibration, deviation, aging, inertial force, overload, etc. It can work stably for a long time without human operation;
5. High dynamic measurement accuracy: The sensing system has stable performance and is not affected by mechanical or environmental factors. It adopts temperature compensation, material control, and variable coefficient technologies, which have good stability and long-term stable and reliable working performance. The dynamic measurement accuracy and control accuracy are high.
6. System verification is simple and easy to implement: using the principle of material absorption of gamma rays, a simulated load sheet is used instead of a physical object to verify the stability of the system; For daily accuracy testing, a calibration board can be used. After calibrating the gamma ray absorption coefficient k1 of the lightweight material to the americium (241Am) source, a 5mm thick organic glass plate can be fixed at a certain position under the americium (241Am) source, replacing the cumulative value of the nuclear scale or belt running continuously at a fixed speed for 5-10 minutes or 5-10 full circles. The stability of the nuclear scale can be determined by comparing the weight cumulative values at different times, which is convenient and practical;
7. Wide applicability: It is not affected by changes in environmental temperature and humidity, conveyor position, inclination angle, material thickness, or frequent start stop, and is suitable for online measurement and control of bulk lightweight materials (such as organic matter, kitchen waste, plastic, rubber, leather, commodity packaging, sawdust, paper, dead branches and leaves, tobacco, textiles, synthetic fibers, etc.) in various occasions;
8. Safe and reliable protection: The selected radioactive source is low-energy, low radiation americium (241Am) radioactive source, and the external adopts a fully sealed, multi-layer protective structure, which is safe and reliable; Due to the half-life of 241Am radioactive source being as long as 426 years, it is relatively easy to shield and protect. Generally, a 3mm iron plate is sufficient, which is relatively safe to use and fully complies with national health protection standards;
9. Fully functional host: The host system adopts high reliability PLC or IPC, which is easy to operate, fully functional, and has a rich human-machine interface. It has graphic and textual display functions such as working condition flow, process parameters, process trends, and fault diagnosis, which can facilitate and intuitively operate parameter equipment, signal calibration, automatic verification, fault query, etc; It also has functions such as multi machine joint work, data exchange, query, statistics, printing reports, cumulative shift production, daily production, automatic shift change, etc; It can display instantaneous and continuous measurement, and can count the quality and quantity of materials within a specified time;
10. Strong system scalability, multiple fieldbus capabilities: capable of inputting and outputting various standard signals, easy to exchange process and operating parameters with other control devices on site, and can operate as a single machine or a full line chain machine;4-20mA analog output, signal can be connected to DCS system, with the ability to link to on-site control network, equipped with Profibas dp interface or Modbus interface, supporting OPC sharing, facilitating near and remote monitoring, achieving integrated management and control, facilitating system integration of production equipment, real-time network data transmission, and remote control management.

1. Dynamic measurement accuracy:
(1) During normal operation of the belt conveyor, the dynamic cumulative measurement error is ≤± 2%, and the flow rate setting or proportioning control error is ≤± 1%;
(2) Measurement and control error for non belt conveyor equipment is ≤± 3%;
(3) Long term stability: Under normal working conditions, the no-load signal voltage U0 drifts by ≤± 0.2% within 48 hours, without measurement errors caused by mechanical variations, conveyor vibration, wear, tape tension, deviation, etc.
2. The average time between failures is over 10000 hours.
3. Suitable for conveyor material carrier width of 300-2000mm, conveyor speed of 0-5m/s. (Beyond this range, special customization is available)
4. Power supply: 50Hz (-5%,+5%); 220VAC(-15%，+10%) 。

Suitable for online measurement of lightweight materials in industries such as plastic chemical, synthetic fiber, tobacco, rubber, and garbage classification and treatment.