Instrument features:

1. Testing method: Compliant with methylene blue spectrophotometry（GB 11742-89）。

2. Instrument composition: The instrument consists of a host, sampling device, and reagent kit, packaged in a whole box. The instrument has a small volume, light weight, simple operation, and is suitable for field and laboratory use.

3. Optical path system: The instrument light source and detector adopt an all solid state structure, with no movable parts, and high accuracy and precision; Adopting energy-saving design with automatic light source switchingThe service life of the light source is over 100000 hours. Compared with traditional spectroscopic systems, it has a simple structure and strong seismic and moisture resistance.

4. Display mode: Adopting4.7-inch large LCD screen with Chinese display. Directly display the concentration of the measured substance and show the absorbance of the current measurement.

5. Built in curve: With a built-in working curve, there is no need to prepare standard solutions. Only zero point calibration with matching reagents is required to achieve rapid quantitative determination of samples.

6. Measurement method: The sample color development and measurement are carried out in the same sealed container (cylindrical), without the need for transfer, which improves the detection accuracy.

7. Specialized reagent kit: Equipped with a specialized reagent kit, greatly reducing the preparation time of reagents, easy to operate, and convenient to use.

8. Single machine software: The instrument has multiple functions such as measurement, setting, recording, saving, and data statistical processing.

9. Upper computer software: equipped with dedicated workstation software, it can input information such as sample name, tested item, testing institution, and testing personnel, and can export themEXCEL format data. Test reports can be directly written and printed through an external printing system. The detection data can be directly uploaded to the network supervision platform, making it easier for regulatory departments to establish inspection databases in a timely manner.

10. Data interface: peripheral devicesUSB and RS232 interfaces, supporting data management and instrument control.

11. Power supply mode: AC/DC dual-use, the instrument is equipped with a built-in lithium battery to meet emergency and on-site testing needs, and also has a self diagnostic function for battery level, automatically indicating low battery level.

Technical indicators:

Light source: Ultra high brightness LED

Wavelength:635nm

Determination of lower limit:0.005mg/m3

Measurement range:0.00～0.100mg/M3 (sampling 40L)

0.00～0.80mg/M3 (sampling 5L)

Measurement accuracy:±5%

Power Supply:DC 7.4V AC (220 ± 22V, 50 ± 1Hz)