『best flow meter for oxygen|digital flow meter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
1. Chemical Engineering English Translation
Annealing at 800? Under a nitrogen atmosphere, a yellow colored powder is obtained as an intermediate product of BNO, which may have the following formula B4N3O2H [11a]. The yellow powder was further calibrated in air at 600 ° C for 2 hours to obtain more oxygen in the white BNO product. The prepared British National (Overseas) precursor is put into a large graphite crucible. Aluminum chloride is placed in a small BN crucible above the crucible. These components are enclosed in graphite suspension receptors and heated in an induction furnace. Then evacuate the furnace and introduce a pure Ar gas stream. Heating the furnace step by step. When the gas flow rate at a temperature of about 950 ℃ C is switched to: pure NH3/N2 (N2 100 mL/min ± 1, ammonia nitrogen 200 mL/min ± 1). Afterwards, raise the temperature and maintain it at 1200 C for approximately 1.2 hours. Then increase the temperature further. Adjustment of position sensor for British National (Overseas) precursor in large graphite crucible to ensure heating of BNO precursor mixture at C. 1600? The atmosphere is that the flow of N2/NH3 has the same velocity, as in the first stage. After about an hour of coaxial tubular single crystalline cubic aluminum nitride nanotubes and a BN coating. The X-ray diffractometer (2200HF RINT) and high-resolution transmission field emission electron microscope (HRTEM) (JEM-3000F) on this product are connected to an X-ray energy dispersive spectrometer (EDS).
2. Explanation of several physical and chemical instruments for high resolution
Dissolved oxygen analyzer technical parameters display: Chinese display, 192 × 64 dot matrix LCD range: 0-20ug/L;
; 0～200ug/L;
10, 0~20 or 4~20mA (two-way isolated output) Output current accuracy: ± 0.1mA Maximum load resistance: 800 Ω (20mA Max.) Voltage: 198VAC~242VAC, 50Hz ± 1Hz Power: ≤ 8VA Insulation: Power supply to ground 1500V/1 Minute no arcing alarm output: dual normally open programmable relay contacts: 5A/30VDC or 5A250VAC. Communication: CAN bus (optional) Storage and transportation temperature: -25 ℃~55 ℃ (excluding electrodes, electrodes should be higher than 0 ℃) External dimensions: 158 width x 158 height x 170 depth mm Hole size: 140mm x 140mm Weight: 2 kilograms --------------------------------------------------------------------------------------------------------------------------------------------------The electrode structure is sturdy and has strong anti pollution ability. Two relays can achieve high/low temperature or oxygen concentration alarm. Two channels of 4-20mA are available Isolation current output ◇ has data storage function, which can store measurement data for at least one month --------------------------------------------------------------------------
Hot Blog
Related AD
