LD-5C (B) microcomputer laser dust analyzer

1、 Product Introduction

A microcomputer laser dust analyzer with a built-in filter membrane sampler can continuously monitor dust concentration while collecting particulate matter, allowing for analysis of its composition and determination of the mass concentration conversion coefficientKValue. Directly readable dust mass concentration（mg/m3）, possessingPM10ThePM5ThePM2.5andTSPThe cutter is available for selection, and the instrument uses a powerful suction pump, making it more suitable for central air conditioning exhaust outlets that require long sampling tubesPM10Detection of inhalable particulate matter concentration.
The instrument meets the hygiene standards of industrial enterprises（GBZ1-2002）Exposure limits for harmful factors in the workplace（GBZ2-2002）Standards, Ministry of HealthWS/T206-2001Inhalable particulate matter in the air of public places（PM10）Measurement method-Light Scattering Law "standard, Ministry of LaborLD98-1996The standard for the determination of dust concentration in the air by light scattering and the Ministry of RailwaysTB/T2323-92Industry standards such as "Determination of Relative Mass Concentration and Conversion Method of Mass Concentration of Dust in the Air of Railway Workplaces" and health supervision issued by the Ministry of Health2006[]58The hygiene standards for centralized air conditioning and ventilation systems in public places have been promulgated and implemented.

2、 Main technical indicators
1.configuration40mmFilter membrane online sampler;
2.Equipped with replaceable particle cuttersPM10ThePM5ThePM2.5andTSPfor selection;
3.Direct reading of dust quality concentration（mg/m3）；
4.Large screen LCD display,Chinese character menu prompt;
5.Detection sensitivity: low sensitivity0.01mg/m3； high sensitivity0.001mg/m3；
6.Repetitive error:±2％；
7.Measurement accuracy:±10%；
8.Measurement range:0.01～100 mg/m3； 0.001～10 mg/m3；
9.Measurement time:0.1minute, oneminute(Standard measurement time),and(1-9999)Minutes can be set arbitrarily;
10.It has public place monitoring mode, atmospheric environment monitoring mode, and labor hygiene mode. Can calculate the time weighted average（TWA）Allowable concentration for short-term contact（STEL） Wait;
11.Storage: General measurement,Recyclable storage99Group data. continuous monitoring，storage9999A concentration value-passPCMachine reading;
12.Timed sampling: measurement time can be set（1～9999）Second, shutdown time（0～9999）In seconds, Preheating time（0～10）Seconds and Sampling Times（1～9999）Secondly;
13.Alarm threshold setting for excessive dust concentration: maximum concentration threshold: 65mg/m3Measurement time:（1～9999）Seconds;
14.Output interface:
(1) PCSerial interface for machine communication:RS232；
(2)Micro printer output interface;
(3)Analog output interface:0—1V；
(4)Digital output interface: level signal.
15.power supplyNi-MHRechargeable battery pack（1.2V x 4）, can be used continuously8Hour; Appendix220VAC/12VDCThe power adapter;
16.Weight:2.4kg.

3、 Main technical features
1.Designed a replaceable particle cutter and achievedPM10ThePM5ThePM2.5TheTSPMultiple particle separation cutters are compatible.
2.Designed an online filter membrane sampler that is compatible with continuous monitoring of dust concentration and filter membrane sampling. It can analyze the composition of collected particles and calculate the mass concentration conversion coefficient of the siteKValue.
3.Using a laser light source, the conversion coefficient of mass concentration is not affected by the color of particles.
4.Adopting a large screen LCD display of Chinese characters, Chinese character menu prompts have been implemented.
5.Designed a constant current controller, Ensure a constant sampling flow rate and correct cutting curve.
6.Equipped with built-in optical standard scatter board,Ensure high stability of the instrument.
7.Featuring a special protective air curtain, it prevents dust from damaging the core components of the instrument—Pollution from optical systems ensures high reliability of instruments .
8.The automatic zero adjustment of the instrument is achieved through computer software, which improves the measurement accuracy of the instrument and facilitates user use.
9.The instrument is designed with a timed sampling mechanism, which can perform timed sampling, start and stop according to the set time. The obtained data can be obtained through Micro printer records or importsPCThe machine processes data to make the instrument suitable for continuous monitoring of inhalable particulate matter in the atmospheric environment.
10.The instrument can set an alarm threshold for excessive dust concentration, and automatically sound and light an alarm when the dust exceeds the standard, or transmit the signal to the control center for monitoring.
11.The instrument is designed with an analog output interface, which can draw a purification efficiency evaluation curve when evaluating the air purifier.
12.In addition to the general measurement mode suitable for dust monitoring in indoor public places and the timed sampling mode suitable for atmospheric environment monitoring, a new labor hygiene mode has been added. In this mode, according to the hygiene standards of industrial enterprises（GBZ1-2002）Exposure limit standards for harmful factors in the workplace（GBZ2-2002）Calculate the time weighted average（TWA）And the allowable concentration for short-term exposure（STEL）.