CONCENTRATION METER OF MOBILE INFUSORIA IN LIQUID MEDIA Russian patent published in 2018 - IPC G01N21/3577 G01N9/04 

FIELD: measuring equipment.

SUBSTANCE: invention relates to the field of photometry of liquid media. Liquid media concentration meter contains a radiation source, a cuvette, a low-pass filter, an amplifier, an integrator, a master oscillator. Device also includes a photo-converting amplifier, a delay device, a signal extraction device, a controlled detector, a storage device, a threshold device, temperature stabilizer connected to the cuvette, a control oscillator and a microcontroller. Detector is made to be controllable. Through the cuvette the radiation source is optically coupled to the photo-converting amplifier connected to the input of the delay device, whose output is connected to the input of the low-pass filter. Second input is connected to the output of the master oscillator. Low-pass filter output is connected to the input of the signal extraction device, whose output is connected to the input of the amplifier. Second input is connected to the input of the control oscillator, the first input of the controlled detector and the first input of the storage device, which second input is connected to the input of the controlled detector. Output is connected to the input of the threshold device, whose output through the microcontroller is connected to the first input of the current amplifier, which output is connected to the radiation source. Second input is connected to the output of the integrator, which output is connected to the second input of the low-pass filter. Second input of the microcontroller is connected to the output of the master oscillator, and its output is connected to the input of the indicator device.

EFFECT: automation of the concentration meter, providing an opportunity to study LDM and increase in the accuracy and stability of its research.

5 cl, 1 dwg