Detailed technical parameters of CY-2 direct reading BOD analyzer

Inject the water sample or the pretreated water sample into the culture bottle, and put the carbon dioxide absorbent (NaOH) in the absorption cup of the bottle mouth, then seal the culture bottle and place it in the biochemical incubator. When the sample is tested at 20 After five days of incubation at a constant temperature of ±1 ° C, the water sample in the bottle was subjected to a biooxidation reaction at a certain stirring speed. The organic matter is converted into oxides of nitrogen, carbon and sulfur, and the carbon dioxide gas is absorbed by the sodium hydroxide, and the oxygen in the upper space of the culture bottle is continuously supplied to the oxygen demand of the microorganisms in the water sample, and a pressure difference is generated in the culture bottle. By measuring the height of mercury in the glass tube, the BOD value of the water sample during the specified measurement period can be calculated.

Brass Nut

Copper nuts made of all kinds of embossed wire (usually lead brass, such as H59, 3604, 3602). Our daily contact with the embedded knurled copper nuts are processed by precision automatic lathes. The reference standard of embedded knurled copper nut comes from GB/T809, but the technical parameters of all kinds of embedded nuts produced by our company exceed the relevant indexes required by the national standard.

Knurling copper nut is mainly used for hardware Spring, shaped spring, craft gift spring, battery spring, spring antenna,key ring, phosphorus copper spring CNC automatic lathe turning parts (copper car parts, iron, aluminum car parts), metal stamping parts, electronic parts, iron shaft, single Rachel,Rachel, iron pin, non-standard Screw nut,fittings,fasteners, wire forming (wire card holder, Model aircraft landing gear, S hook, R latch, triangle buckle, D buckle) and other hardware products, belonging to the copper nut series.

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