Execution standards：
GB/T 3836.1-2021 Explosive Atmosphere Part 1: General Requirements
GB/T 3836.2-2021 Explosive Atmosphere Part 2: Equipment Protected by Flameproof Enclosures "d"
GB/T 3836.3-2021 Explosive Atmosphere Part 3: Equipment Protected by Increased Safety Type "e"
GBT 3836.9-2021 Explosive Atmosphere Part 9: Equipment Protected by Sealed Type "m"
GB/T 3836.31-2021 "Explosive Atmosphere Part 31: Equipment Protected by Dust Ignition Resistant Enclosures" t ""
GB 3836.15-2000 "Electrical equipment for explosive gas atmospheres - Part 15: Electrical installations in hazardous areas (excluding coal mines)"
GB 12476.1-2013 "Electrical equipment for use in environments with combustible dust - Part 1: General requirements"
GB12358-2006 General Technical Requirements for Workplace Gas Detection and Alarm Devices
GBZ 2.1-2007 Occupational Exposure Limits for Hazardous Factors in the Workplace
GB 4208-2008 "Degrees of Protection Provided by Enclosures (IP Code)
Characteristics of dust concentration detector：
■ Customizable range intelligent sensor, using safety technology, supporting multi dust and multi range detection, with a range of selectable (100ug/m3~1000mg/m3), and can provide customized products according to user needs;
■ The use of MCU chips highlights the detector's low power consumption, safe and reliable performance, precise data conversion, stable signal output, and more; Multiple signal outputs such as 4-20mA, RS485, and switch values are convenient for connecting to industrial control systems such as PLC, DCS, and DDC. It can also be used to control equipment such as fans and solenoid valves through switch value linkage;
■ Support customized wireless signal transmission: Zigbee, LORA, 433M, 4G, WiFi, NB, GPRS, etc;
■ Dot matrix high-definition LCD TFT display screen, with Chinese and English operation interfaces that can be switched by oneself;
■ The detector can be operated through remote control without opening the cover, including functions such as alarm value, zero adjustment, calibration, reset, and address code modification;
■ Local integrated sound and light alarm indication, which can achieve remote alarm prompts for mobile phones, computers, monitoring rooms, third-party platforms, etc. through alarm control ■ host or wireless signals. It can also be remotely controlled by infrared with one click silencing;
■ Aluminum alloy cast explosion-proof shell, sturdy and durable;
■ Through various international certifications such as CMA, CNAS, CE, ROHS, SIL, UL, ECM safety, etc.
■ Explosion proof certificate level: Ex db eb mb IIC T4 Gb; Ex mb tb IIIC T130℃ Db；
■ Explosion proof certificate number: SYEx23.0499;
■ Protection level: IP65;
Product parameters of dust concentration detector：
| output signal | ① 4-20mA signal: standard 12 bit precision 4-20mA output chip, transmission distance of 1km ② RS485 signal: using standard MODBUS RTU protocol, transmission distance of 1km ③ Voltage signal: 0.4-2V, 0-5V, 0-10V output, optional (choose between voltage output and current output -) ④ Switching signal: Standard configuration includes 1 set of passive contact relays with a capacity of 220VAC 3A/24VDC 3A ⑤ Wireless signals such as GPRS, 4G, WIFI, LORA, ZigBee, etc
|
| receiver | User computer, control alarm, PLC, DCS, DDC, etc |
| way of working | Diffusion type |
| Testing medium | Dust particles(PM1、PM2.5、PM10、TSP) |
| Detection Principle | Laser scattering |
| detection range | Small range: 0-1000/2000/4000/6000/8000/9999ug/m3 Large range: 0-10/100/1000mg/m3 (range can be customized) |
| Resolution | 0.001、0.01、0.1、1(Depending on the measurement range) |
| detection error | ≤± 5% F.S (≤ 5% over full range) |
| Repeatability | ≤±2% |
| linearity error | ≤±2% |
| response time | ≤30S |
| working voltage | DC24V(12V~30V) |
| operation temperature | -20℃~50℃(special requirements:(-40℃~+70℃℃) |
| Working humidity | 10-95%RH(No condensation) |
| Sensor lifespan | 2-3 years (depending on the usage environment) |
| Explosion proof form | The probe transmitter and sensor are both explosion-proof。 |
| Connecting cables | ① Choose a three core shielded cable for 4-20mA and a four core cable for RS485. When the distance exceeds 1000 meters (with one detector), the single wire diameter should be greater than 1.5mm, and the shielding layer should be grounded. ② Wireless transmission: It can be equipped with built-in LORA and Zigbee modules for short-range wireless transmission; External GPRS/4G module for remote data transmission to cloud platform, allowing for viewing of historical records on both computer and mobile devices without distance limitations (optional) |
| Alarm method | On site sound and light alarm, external alarm, remote controller alarm, computer data acquisition software alarm, etc |
| Alarm settings | Standard configuration with two-level alarms; Alarm modes can be set: regular high and low alarm, interval control alarm |
| External dimensions | 252*205*93(L*W*H) |
| electrical interface | Default M20X1.5 internal thread, optional 3/4NPT, 1/2NPT |
| Measurement certificate | Optional, customer pays for expenses |
| attachment | One copy each of the packaging box, instruction manual, certificate of conformity, and delivery note |
| Optional accessories | Temperature and humidity measurement, 220V to 24V power adapter Optional accessories Computer monitoring accessories: free upper computer software, USB to RS485 conversion cable. If network transmission is required, an RS485 to Ethernet converter is also needed |
Installation position of dust concentration detector：
1: Dust concentration measuring instrument, fixed, generally requires separate installation by design institutes;
2: The location for belt transportation should be installed between 0.5-2 meters above the transfer point;
3: Production workshop, install columns or walls about 2.5 meters in the workshop;
4: Install the polishing machine between 0.5-2 meters above the polishing machine in places with it;
5: The place where coal powder, flour, and other materials are stacked is called the production point, which is installed above the production point. For example, if the coal powder is 15 meters high,
it should be installed 0.5-2 meters above this point, which is about 18 meters.
The range of the dust concentration detector refers to the regulations：
For questions related to the exposure limits and concentrations of various types of dust and their potential harm to human health, please consult sales personnel.
Allowable concentration of dust in workplace air
| Serial Number | Chinese name | English name | 化学文摘号(CASNO.) | PC-TWA(mg/m3) |
| total dust | respirable dust |
| 1 | 白云石粉尘 | Dolomite dust |
| 8
| 4 |
| 2 | 玻璃钢粉尘 | FRP dust |
| 3 | - |
| 3 | 茶尘 | Tea dust |
| 2 | - |
| 4 | 沉淀Si02(白炭黑) | Precipitated silica dust | 112926-00-8 | 5 | - |
| 5 | 大理石粉尘 | Marble dust | 1317-65-3 | 8
| 4 |
| 6 | 电焊烟尘 | Welding fume |
| 4 | - |
| 7 | 二氧化钛粉尘 | Titanium dioxide dust | 13463-67-7 | 8 | - |
| 8 | 沸石粉尘 | Zeolite dust |
| 5 | - |
| 9 | 酚醛树酯粉尘 | Phenolic aldehyde resin dust |
| 6 | - |
| 10 | 谷物粉尘(游离Si02含量<10%) | Grain dust(free Si02<10%) |
| 4 | - |
11
| 硅灰石粉尘 | Wollastonite dust | 13983-17-0 | 5 | - |
12
| 硅藻土粉尘(游离Si02含量<10%) | Diatomite dust(freeSiO2<10%) | 61790-53-2 | 6 | - |
| 13 | 滑石粉尘(游离Si02含量<10%) | Talc dust (free Si02<10%) | 14807-96-6 | 3 | 1 |
| 14 | 活性炭粉尘 | Active carbon dust | 64365-11-3
| 5 | -
|
| 15 | 聚丙烯粉尘 | Polypropylene dust |
| 5 | - |
| 16 | 聚丙烯腈纤维粉尘 | Polyacrylonitrile fiber dust |
| 2 | - |
| 17 | 聚氯乙烯粉尘 | Polyvinyl chloride (PVC)dust | 9002-86-2 | 5 | - |
| 18 | 聚乙烯粉尘 | Polyethylene dust | 9002-88-4 | 5 | - |
19
| 铝尘 铝金属、铝合金粉尘 氧化铝粉尘 | Aluminum dust: Metal & alloys dustAluminium oxide dust | 7429-90-5 |
3
4 |
- - |
| 20 | 麻尘(游离Si02含量<10%) 亚麻 黄麻 苎麻 | Hemp dust(freeSiO2<10%) Flax Jute Ramie |
|
1.5 2 3 |
- - - |
| 21 | 煤尘(游离Si02含量<10%) | Coal dust(free Si02<10% |
| 4 | 2.5 |
| 22 | 棉尘 | Cotton dust |
| 1 | - |
| 23 | 木粉尘 | Wood dust |
| 3 | - |
| 24 | 凝聚SiO2粉尘 | Condensed silica dust |
| 1.5 | 0.5
|
| 25 | 膨润土粉尘 | Bentonite dust | 1302-78-9 | 6 | - |
26
| 皮毛粉尘 | Fur dust |
| 8 | - |
| 27 | 人造玻璃质纤维 玻璃棉粉尘 矿渣棉粉尘 岩棉粉尘 | Man-made vitreous fiber Fibrous glass dust Slag wool dust Rock wool dust |
|
3 3 3 |
- - - |
| 28 | 桑蚕丝尘 | Mulberry silk dust |
| 8 | - |
29 | 砂轮磨尘 | Grinding wheel dust |
| 8 | - |
| 30 | 石膏粉尘 | Gypsum dust | 10101-41-4 | 8 | 4 |
| 31 | 石灰石粉尘 | Limestone dust | 1317-65-3 | 8 | 4 |
32
| 石棉(石棉含量>10%) 粉尘 纤维 | Asbestos(Asbestos>10%) dust Asbestos fibre | 1332-21-4 |
0.8 0.8f/ml |
- - |
| 33 | 石墨粉尘 | Graphite dust | 7782-42-5 | 4 | 2 |
| 34 | 水泥粉尘(游离Si02含量<10%) | Cement dust (free SiO2<10%) |
| 4 | 1.5 |
| 35 | 炭黑粉尘 | Carbon black dust | 1333-86-4 | 4 | - |
| 36 | 碳化硅粉尘 | Silicon carbide dust | 409-21-2 | 8 | 4 |
37
| 碳纤维粉尘 | Carbon fiber dust |
| 3 | - |
38 | 矽尘 10%≤游离SiO2含量≤50% 50%<游离SiO2含量≤80% 游离SiO2含量>80% | Silica dust 10%≤free SiO2≤50% 50%<free SiO2≤80% free SiO2>80% | 14808-60-7 |
1 0.7 0.5
|
0.7 0.3
0.2
|
| 39 | 稀土粉尘(游离Si02含量<10%) | Rare earth dust(freeSi02<10%) |
| 2.5 | - |
| 40 | 洗衣粉混合尘 | Detergent mixed dust |
| 1 | - |
| 41 | 烟草尘 | Tobacco dust |
| 2 | - |
| 42 | 萤石混合性粉尘 | Fluorspar mixed dust |
| 1 | 0.7 |
| 43 | 云母粉尘 | Mica dust | 12001-26-2 | 2 | 1.5 |
| 44 | 珍珠岩粉尘 | Perlite dust | 93763-70-3 | 8 | 4 |
| 45 | 蛭石粉尘 | Vermiculite dust |
| 3 | - |
| 46 | 重晶石粉尘 | Barite dust | 7727-43-7 | 5 | - |
| 47 | 其他粉尘a | Particles not otherwise regulated |
| 8 | - |
a: Refers to dust with a free SiO2 content of less than 10%, free of asbestos and toxic substances, and without established allowable concentrations. All types of dust listed in the table (excluding asbestos fiber dust) with free SiO2 above 10% shall be treated according to the allowable concentration of silica dust. For dust, use over limit multiples to control the excessive fluctuations in its short-term exposure level. Under the premise of complying with PC-TWA, the exceedance factor of dust is twice that of PC-TWA |
