An autonomous sensor for monitoring phosphate levels in aqueous samples has been developed. The sensor is based on the molybdenum yellow method for detection of phosphate, which involves the formation of a yellow-coloured compound when a phosphate-containing sample is mixed with an acidic reagent containing ammonium molybdate and ammonium metavanadate. The reaction is carried out in a microflui...

Abstract We propose ghost imaging (GI) with deep learning to improve detection speed. GI, which uses an illumination light random patterns and a single-pixel detector, is correlation-based thus suitable for detecting weak light. However, its time too long practical inspection. To overcome this problem, we applied convolutional neural network that was constructed based on classification of the c...

We revisit the doubly-layered sandwich detector con guration for single-shot dual-energy x-ray imaging. In order to understand its proper operation, we investigated the contrast-to-noise performance in terms of the x-ray beam setup using the Monte Carlo methods. Using a pair of active photodiode arrays coupled to phosphor screens, we have built a sandwich detector. For better spectral separatio...

A simple, rapid, low cost and accurate determination using flow injection spectrophotometry with a home made flow cell detector, in combination with green LED and photodiode, had been developed for nitrite based on the Griess-Saltzman reaction, measuring the absorbance at 525 nm. The proposed system is able to monitor nitrite in freshwater samples at a throughput of 60 samples per hour with a r...

A Si-photodiode array detector operated in the photovoltaic mode is shown to offer several advantages over other fluorescence detectors: high efficiency, perfect linearity of the response, vacuum compatibility for soft X-ray measurements, absence of gas and voltage supplies. Low temperature cooling down to 120°c is needed in order to decrease the dark current and thermal noise of the shunt resi...

The detection sensitivity (DS) of the commercial single-photon-receiver based on InGaAs gate-mode avalanche photodiode is estimated. Instalment of a digitalblanking-system (DBS) to reduce dark current makes the difference betweenDS, which is an efficiency of the detector during its open-gate/active state, and the total/overall detection efficiency (DE). By numerical simulations, it is found tha...

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This paper presents a multichannel, time-resolved picosecond laser ultrasound system that uses a custom complementary metal-oxide-semiconductor linear array detector. This novel sensor allows parallel phase-sensitive detection of very low contrast modulated signals with performance in each channel comparable to that of a discrete photodiode and a lock-in amplifier. Application of the instrument...

In the present work we intend to assess the readout feasibility of Avalanche Photodiode (APD) detectors via long signal lines for the development of a combined small-animal PET-MR prototype based on the ClearPEM technology. The detection performance of a LYSO-APD module was evaluated reading out the APD charge signals to the front-end ASIC via an 80 mm length flexible flat-cable (FFC). Experime...

This paper describes a reserved-phase high-performance liquid chromatographic (HPLC) method for detecting malachite green (MG) and leuco-malachite green (LMG) using an isocratic toxic organic solvent/reagent-free mobile phase. Chromatographic separations were performed an Inertsil WP300 C4 with 0.02 mol/L octane sulfonic acid–ethanol mobile phase and a photodiode-array detector. The total run t...