1. Product introduction

DDY-5 individual explosion-proof (mining individual, air, poison, low flow) atmospheric sampler, in strict accordance with the "National Labor Hygiene and Workshop Air Monitoring Standards" and HBC 2-2001 "Ambient Air Sampler" JJG 956-2000 "Atmosphere It is developed and produced according to the sampler" standard. It is an unconventional instrument for collecting gas poison samples in an explosive gas environment. It is an ideal instrument among small portable explosion-proof atmospheric sampling instruments in China. By changing different sampling loads, it can not only collect toxic gases, but also can be used together with activated carbon sampling tubes, silica gel sampling tubes, gas sampling bags and various solid adsorbent tubes. Equipped with a Φ25mm micro sampling head and an impact pre-collector, it can collect harmful dust and respirable dust (RSP) in the air. It is especially suitable for sanitary monitoring and evaluation of environmental monitoring, disease prevention, labor protection, safety supervision, military, meteorology, scientific research and teaching, mining, metallurgy, chemical industry and other departments containing explosive gas, and can also be used in conjunction with related instruments.

The instrument is an intrinsically safe instrument, the shell is made of high-strength ABS engineering materials, the function keys are made of PVC sealed touch switches, the protection level is IP54, and special treatment has been carried out to prevent moisture, dust and static electricity. Using intelligent single-chip control and four-digit LCD digital display system, it has the advantages of simple operation, safety and reliability, and convenient maintenance. It can be used for fixed-point sampling or portable sampling. It has the characteristics of one machine for multiple purposes.

2. Product parameters

1. Flow range: 20～500 ml/min, 0.1～1 L/min, 0.1～1.5 L/min, 0.1～3 L/min

2. Load capacity: 2.5 L/min [35 Kpa load]

3. Constant current accuracy: <±1.5%

4. Flow meter accuracy: <2.5 class

5. Flow stability: <±5% within 30 min

6. Ambient atmospheric pressure: 80 KPa～110 Kpa

7. Display module: four-digit LCD liquid crystal display

8. Timing range: 99 h 59 min (single-chip intelligent control)

9. Timing error: ≤±0.1‰

10. Working status: intermittent or continuous work

11. Continuous time: >600 min

12. Working noise: <50 dB (A)

13. Working conditions: -15℃～45℃

14. Relative humidity: <85%

15. Storage temperature: -30℃～55℃

16. Working power supply: DC 6V/1.6An/ Ni-MH

17. Charging current: 180 mA (standard type)

18. Dimensions: 128*88*45 (mm3)

19. Instrument mass: 0.5 kg (including battery pack)

20. Explosion-proof mark: Exia II CT4

21. Explosion-proof form: intrinsically safe

3. Product Features

1. Intelligent digital display window reading, menu setting, intuitive and clear, sealed touch switch, with power, resistance, flow compensation and other functions.

2. Accurate measurement and timing, high precision, compact structure and stable performance. It can be used for fixed-point sampling or portable sampling.

3. It can be used with various liquid absorption bottles, activated carbon sampling tubes, silica gel sampling tubes, gas sampling bags and various solid detection tubes.

4. Intrinsically safe Exia II CT4, the battery pack is connected in series with 6 0.51Ω/3W current limiting resistors, potted with silicone rubber and epoxy resin.

5. Imported explosion-proof and low-energy-consumption miniature motor, three diodes are connected in reverse parallel with the motor to form a protective element, which is both safe and reliable.

6. DC power supply, built-in battery adopts non-memory high-capacity battery pack, under-voltage, charging prompt, automatic constant voltage and constant current and other functions.

■Note: It is strictly forbidden to disassemble the instrument and charge it in an explosive gas environment.