Brief introduction: According to the HJ/T86-2002 standard issued by the State Environmental Protection Administration, "Rapid determination of Water quality BOD microbial sensors" is classified as "A method" in the fourth edition of "methods for Monitoring and Analysis of Water and Wastewater". Principle: the microbial membrane is fastened to the oxygen electrode to form the microbial electrode. When the water sample containing saturated dissolved oxygen enters the flow tank, it contacts with the microbial sensor. The soluble biodegradable organic matter in water samples is affected by the bacteria species in the microbial membrane, which reduces the quality of oxygen diffusion to the surface of the oxygen electrode. When the diffusion rate (mass) of biodegradable organic matter to the membrane is constant, the mass of oxygen diffused to the surface of the oxygen electrode is constant, thus a constant current is generated. There is a quantitative relationship between the constant current and the difference of biodegradable organic matter concentration in the water sample and the reduction of oxygen, according to which the biochemical oxygen demand in the water sample can be converted. Performance indicators: 1, Measurement range: 2-400 mg / L (depending on the need to change the pump speed and sample contact time to change the measurement range, > 400mg/L samples need to be diluted) 2, Sample measurement time: 60 min / sample (including 5 minutes for standard sample calibration and 15 minutes for sample measurement, and 15 minutes for each of three pipeline cleanings) 3, Calibration: single point calibration with glucose glutamate 4, Display mode: LCD LCD screen 20 characters x 2 lines 5, repeatability: ≤ 5% 6,Output: recorder output, display output, print output 7, Adjustable temperature range: ≤ 35 ℃ ±0.2 ℃ 8, Rated power supply: AC220V ±22V, 50Hz ±1Hz, 1.5A max 9, Size: 370w) x 350g) × 300hhmm 10, Weight: 14 kg 11, Ambient temperature: 5-40 ℃ 12, Environmental humidity: ≤ 90%RH 13, Signal output: microbial electrode 0-20 μ A 14,Electrode life: more than 2 years 15, Peripherals: standard solution, buffer, antimicrobial pipe, printer.
Brief introduction: According to the HJ/T86-2002 standard issued by the State Environmental Protection Administration, "Rapid determination of Water quality BOD microbial sensors" is classified as "A method" in the fourth edition of "methods for Monitoring and Analysis of Water and Wastewater". Principle: the microbial membrane is fastened to the oxygen electrode to form the microbial electrode. When the water sample containing saturated dissolved oxygen enters the flow tank, it contacts with the microbial sensor. The soluble biodegradable organic matter in water samples is affected by the bacteria species in the microbial membrane, which reduces the quality of oxygen diffusion to the surface of the oxygen electrode. When the diffusion rate (mass) of biodegradable organic matter to the membrane is constant, the mass of oxygen diffused to the surface of the oxygen electrode is constant, thus a constant current is generated. There is a quantitative relationship between the constant current and the difference of biodegradable organic matter concentration in the water sample and the reduction of oxygen, according to which the biochemical oxygen demand in the water sample can be converted.
