4 results about "Photometer" patented technology

In an integrated optical lightguide device including a light-transmitting core layer, an inclusion or buffer layer, and an active or cladding layer. The cladding layer is divided into segments. Groups of different segments exhibit different refractive indices, light intensity profiles or different degrees of sensitivity which have been effected by different methods. Thus, repeated adjustable or controllable transmission has resulted in an extremely sensitive waveguide system for a sensor, a modulator, or a spectrophotometer.

The disclosure provides a portable photometer capable of adjusting an ultra-long absorption optical path and a measuring method thereof. The portable photometer comprises an excitation light source, acolorimetric pool, reflecting mirrors, an auxiliary reflecting mirror and a light collector. The excitation light source is arranged at one end of the colorimetric pool and the light collector is arranged at the other end of the colorimetric pool; and the reflecting mirrors are arranged at the two sides of a colorimetric pool area between the two ends, so that parallel monochromatic light emittedby the excitation light source is reflected and propagated in the extending direction of the colorimetric pool. The colorimetric pool is arranged in parallel with a fixing piece; the fixing piece isused for fixing a smart phone; the arrangement position of the light collector corresponds to a light sensor of the smart phone, so that final transmission light can reach the light sensor through thelight collector. The auxiliary reflecting mirror is arranged at the tail end of the colorimetric pool and, together with the light collector, can guide and collect a light beam deviating in 2N reflection direction to the light sensor. Therefore, the detection sensitivity and accuracy of photometric analysis can be improved and the portability of the device is not obviously reduced.

A photometer is provided for measuring the concentration of a chromophore in a fluid. The photometer includes a light source, a sample cell and a detector. The light source includes first, second, third and fourth light emitting diodes (LEDs). Each of the first and second LEDs emit light at a measurement wavelength and each of the third and fourth LEDs emit light at a reference wavelength. The first and second LEDs are arranged diagonal to each other and the third and fourth LEDs are arranged diagonal to each other. The photometer performs a routine for correcting concentration measurement for LED drift.

The invention relates to an on-line colorimetric pH measuring instrument for water vapor detection of a power plant, and belongs to a water quality chemical analysis instrument. The instrument comprises a multi-path sample injection valve, an overflow device, a water shortage detection device, a channel selection valve, a peristaltic metering pump I, a peristaltic metering pump II, a mixer, an automatic thermostat, a photometer, a pH 6.86 standard liquid barrel, a pH 9.18 standard liquid barrel, a pH 10.0 standard liquid barrel and a phenolphthalein indicator barrel. The instrument has the advantages that the non-traditional glass electrode is used as the pH sensor, the glass electrode and corresponding accuracy influence factors are eliminated, the photometer with high stability and accuracy is used for measurement, the measurement accuracy and reliability are greatly improved, the workload of instrument maintenance personnel is reduced, and the method is a novel method for online measurement of the pH of a steam-water system of a power plant. According to the characteristic of slow change of water quality pH of a power plant, time-sharing measurement of more paths of water samples can be expanded.