The instrument uses an advanced charge induction measurement principle. During the transportation of the gas-solid two-phase fluid containing dust particles, the dust particles are charged due to the collision and friction between the dust particles and the dust particles, and between the dust particles and the inner wall of the sensor. When the charged dust particles pass through the special measuring electrodes, the measuring electrodes induce positive and negative charges, and the charges form pA-level current signals during the transfer movement. The magnitude of this alternating current signal is proportional to the dust mass content. By further amplifying and calculating the electrical signal, the dust concentration (mg/m3) can be accurately measured.

1.2 Features

■Using solid-state sensor, 360° omnidirectional sensing, stable and durable.

■Support a variety of particle size detection, and the range can be customized.

■Signal output optional: 485, switch value, 4-20mA.

■The value can be directly checked on site, and can be clearly displayed at night.

■On-site power supply adopts 24V DC power supply, which can adapt to a variety of on-site DC power supplies.

■The product adopts a wall-mounted waterproof case, which is easy to install and has a high degree of protection, which can be used in harsh on-site environments.

1.3 Main Specifications

Operating ambient temperature	20---60℃(electronic parts)
Operating environment humidity	90%RH no condensation
Protection class	IP65
Ambient temperature	-20---65℃
Sensor structure	Solid state sensor
Dust particle size range	0.3-400µm, others need to be customized
Type of dust	Pulverized coal, flour, dust, soot, graphite, manganese dioxide, quicklime and other particulate matter
Zero drift (time)	Not more than 1% of the range per year
Zero drift (temperature)	Not more than 1% within the nominal range
Output method	4-20mA, switch value, RS485 (optional)
Measuring range	0.1mg-20mg/100mg/1000mg/20g (other ranges can be customized)
Alarm method	Sound and light alarm
Power supply	AC220V or DC24V/1A

　　Baoding Huazheng Electric Manufacturing Co., Ltd. is a group company,was established in 2008 March, referred to as "Huazheng electric", headquartered in the national historical and cultural city, one of the Beijing Tianjin Hebei regional center city, "South Gate of the capital "——Baoding,our company has 4 subsidiaries,it's the export of electrical testing equipment, State Grid suppliers , the Alibaba was certified as the north base of dream.The company is mainly engaged in the operation of the electronic testing instruments and other products, mainly serving the power system, electrified railway, shipbuilding industry, telecommunications, municipal administration and other large enterprises. Our business covers six major regions: North China, East China, central China, Northeast China, Southwest China and Northwest China, and will set up branches and offices in Beijing, Tianjin, Shanghai and overseas. The product has been successfully applied to power infrastructures such as Africa, Europe and America, and has established good cooperative relations with overseas customers such as Korea, Japan, Great Britain, South Africa and Kenya.WHY CHOOSE HUAZHENG?Huazheng , established in 2008 , is a enterprise which is engaged in the research, development, sale and service of transformer tester,transformer oil tester,relay tester,high voltage tester,circuit breaker tester . We are located in Baoding ,China, which is close to Beijing with convenient transportation access. Our experienced staff are always available to discuss with you for your requirements and ensure full customer satisfaction. In addition, we have obtained I S O and C E certificates. And developed impeccable inspection organization to make sure all of our products quality comply with international standards(like I E C/ A S T M /E N).In China, Huazheng is the supplier of The State Grid, the government purchases many products from our company each year. From 2012 , our products have been exported to clients in such countries and regions as USA, Brazil, Chile, Vietnam, Indonesia, Korea, Turkey, Dubai, South Africa . We also cooperate with some enterprise in the world ,such as Ausgrid , GE. Now we are trying to set up the oversea agent to support the after sales service.