BODG-3063 BOD online automatic monitoring instrument Introduction: The mixture of water sample, potassium dichromate solution, mercury sulfate (mercury sulfate can eliminate the interference of chloride ions in water sample, as chloride ions can form very stable mercuric chloride with mercury ions), and silver sulfate solution (adding silver sulfate as a catalyst can more effectively oxidize linear fatty compounds) is heated to 165 ℃. The color of the organic matter in the solution will change after oxidation by dichromate ions. The analyzer detects this color change and converts this change into BOD value to output. The amount of dichromate ions consumed is equivalent to the amount of oxidizable organic matter. Features: 1. Select the reagent sampling timing. 2. The negative pressure suction of the peristaltic pump always creates an air buffer zone between the reagent and the pump tube, avoiding corrosion of the pump tube. 3. Accurate measurement of reagents is achieved through a visual photoelectric system, overcoming quantitative errors caused by wear of peristaltic pump tubes; At the same time, precise quantification of trace reagents was achieved, with each dose only 1.5 milliliters, greatly reducing the amount of reagents used. 4. The high-temperature and high-pressure digestion system accelerates the reaction process and overcomes the corrosion of equipment caused by corrosive gas volatilization in open systems. 5. Adopting imported new transparent polytetrafluoroethylene hoses with a diameter greater than 1.5mm, the probability of water sample particle blockage is reduced. Technical parameters: Measurement range: 10-1500 mg/L BOD Accuracy: not exceeding ± 10% when ≥ 50mg/L; ＜ At 50mg/L, not exceeding ± 5mg/L Repeatability: not exceeding ± 5% or not exceeding ± 5mg/L Measurement cycle: The minimum measurement cycle is 20 minutes, based on the actual water sample Sampling period: time interval (adjustable from 55 to 9999 minutes) and hourly measurement mode Calibration cycle: 1-99 days, adjustable at any time interval Maintenance cycle: Generally once a month, about 30 minutes each time Output: 4-20mA (2 channels) RS232, RS485 Relay output: 2 control relay outputs Environmental requirements: Indoor with adjustable temperature, recommended temperature+5-28 ℃; Humidity ≤ 90% (without condensation) Size: Height 1450 x Width 510 x Depth 450 mm Power supply: AC220 ± 10% V, 50 ± 10% Hz, 5A
Introduction: The mixture of water sample, potassium dichromate solution, mercury sulfate (mercury sulfate can eliminate the interference of chloride ions in water sample, as chloride ions can form very stable mercuric chloride with mercury ions), and silver sulfate solution (adding silver sulfate as a catalyst can more effectively oxidize linear fatty compounds) is heated to 165 ℃. The color of the organic matter in the solution will change after oxidation by dichromate ions. The analyzer detects this color change and converts this change into BOD value to output. The amount of dichromate ions consumed is equivalent to the amount of oxidizable organic matter.
