The metal Convection heater warm the room as it passes over a heated coil; some use a fan to forced in the cool air to heat. The heated air rises naturally or is forced out by a fan and spreads into the space to warm room.
A metal convection heater is a type of heater that uses convection currents to heat and circulate air. These currents circulate throughout the body of the appliance and across its heating element.
Convector Heater including glass convection heater, metal convection heater, also mini convector heater can be a Frost Heater.
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Gas Convector Heater,Dura Heat Convection Kerosene Heater,Small Convector Heaters,Portable Convection Heater Fenry Manufacturing Co., Ltd , https://www.fenry-fan-heater.com
qualitative or quantitativeanalysis on the measured sample using either the stored spectrum or the plotted
Specification and performance index
1 Basic parameter
1.10Power supply: 230V,50HZ±1HZ, 200W
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The RAY-30 Infrared Oil Meter can be used to record either IR absorption or (with accessories) IR reflection spectra in the range of 4000 cm-1 to 400 cm-1 (wavelengths from 2.5 um to 25um). The user can do
spectrum. It is a useful tool for petrology, the chemical industry, medical work, food,safety, the paper industry, environmental monitoring, the semiconductor industry, etc.,for material structure analysis.
2 Main performance index1.1 Wavenumber range: 4000 cm-1 to 400 cm-1
1.2 Transmittance scale: 0 to 100% (expandable to -400% to 400%)
1.3 Absorbance scale: 0 to 1A (expandable to -4A to 4A)
1.4 Wavenumber scale expansion: 4000cm-1~400cm-1 (optional)
1.5 Transmittance scale expansion: -400%~400%(optional)
    Single beam scale expansion: -400%~400%(optional)
1.6 Scan time for entire range: approx. 2.5 min. to 25 min (in fast response mode)
1.7 Slit program: 5 slit widths: Very Wide, Wide, Normal, Narrow, Very Narrow
1.8 Dimensions: 800mm×610mm×300mm
1.9 Weight: approx. 100 kg
2.1 Wavenumber accuracy: +-4cm-1(4000-2000cm-1);+-2cm-1(2000-400cm-1)
2.2 Wavenumber reproducibility: 2cm-1(4000-2000cm-1);1cm-1(2000-400cm-1)
2.3 Transmittance accuracy: +-0.2% (not including noise)
2.4Transmittance reproducibility: less than 0.4% (1000-930cm-1)
2.5Baseline flatness before correction, less than +-4%,
2.6 Resolution: for polystyrene, having 6 absorption peaks near 3000 cm-1;sixth peak has height above 2%; for ammonia gas near 1000 cm-1, resolution
is 1.5cm-1; peak height is above 0.5%
2.7Scattered light coefficient: less than 0.5% (4000-650cm-1); less than 1%(650-400cm-1)
2.8 Main control and data processing functions: 0 to 100 %T automatic calibration, horizontal and vertical scale expansion, Io baseline shift,wavenumber reset, wavenumber check, automatic filter change, slit
programming, automatic gain adjust, repetitive scan, print spectral peak values, spectral data printout, spectrum derivative (first derivative, second derivative), spectral data smoothing, absorption spectrum expansion,spectrum accumulate, mathematical operations between spectra (+, -, x, /),baseline correction, transmittance to absorbance conversion, spectral file management, (read, save, delete, etc)