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Introduction

Principle & Structure

The dissolved oxygen online analyzer uses the fluorescence method to measure dissolved oxygen. The top of the sensor is covered with a layer of fluorescent material. When the blue light emitted by the sensor irradiates the fluorescent material, the fluorescent material is excited and emits red light. Since oxygen molecules can take away energy (quenching). effect), so the time and intensity of the excited red light are inversely proportional to the concentration of oxygen molecules, and the concentration of dissolved oxygen in water can be obtained by calculation.

Features

The sensor adopts a new type of oxygen-sensitive membrane, with its own NTC temperature compensation function, and the measurement results have good repeatability and stability;

●No oxygen consumption during measurement, no flow rate/agitation requirements;

●Breakthrough fluorescent technology, no membrane and electrolyte, basically no maintenance;

●Built-in self-diagnosis function to ensure accurate data;

Factory calibration, no need to calibrate for one year, can be calibrated on site;

●The distance between the sensor and the transmitter can reach over 100 meters;

●Standard digital signal output, special no-transmitter industrial and mining can realize integration and networking with other equipment;

●Modular installation of sensors to realize plug and play;

●English and Chinese display can be switched, and it is more convenient to use Chinese.

application

On-line monitoring of DO in various processes such as regulating pools, biochemical pools, and effluent in sewage treatment plants;

DO online monitoring in waterworks, surface water, water in various industrial production processes, aquaculture and other industries.

technical parameter

Sensor technical parameters

Measuring range
Dissolved Oxygen:0...20 mg/L、0...20 ppm;
temperature:0...45℃
measurement accuracy
Dissolved Oxygen:Measurement value ±3%;
temperature:±0.5℃
pressure range≤0.3Mpa
Calibration:Air automatic calibration, sample calibration
sensor material
body:1.4435(316L) (normal version), titanium alloy (sea water version)
Upper and lower cover:PPS+glass fiber, cable: PVC
storage temperature15...65℃
Operating temperature0...45℃
sizeDiameter 49.5mm*Length 251.5mm
weight1.4KG
Protection classIP68/NEMA6P
cable lengthStandard 10m cable, extendable to 100m
power supply
AC power supply:AC220V、50HZ
DC power supply:DC24V
Main material:PA66+GF25+FR (upper cover) aluminum alloy spray (lower case)
storage temperature:-20...70℃
Operating temperature:-15...60℃
Installation method:Pinch Pipe/Wall Mount/Panel
waterproof level:IP65/NEMA4X
size:145mm*125mm*162mm (L*W*H)
weight:1.3KG
Show output:128*64 graphic dot matrix LCD, with strong LED backlight, can be operated under direct sunlight
Display Contrast:0-9, 9 gears adjustable
output:Two-way 4-20mA analog output, program setting response parameters and corresponding ranges
Relay:Set three-way relays, program setting response parameters and response values
Digital communications:Equipped with MODBUS RS485 communication function, which can transmit measured values ??in real time
Calibration method:Air calibration (field)
Return to the factory for laboratory calibration

Transmitter Specifications

Selection table

Sensor selection table

AD35A-Fluorescent Dissolved Oxygen Sensor

Probe Material

1.4435(316L)+PVC

Titanium alloy (suitable for sea water)

Measuring range

0...20 mg/L

0...20 ppm

cable length

Standard matching cable length 10 meters

M stands for meters, followed by items to represent the actual cable length, up to 100 meters.
The above selection table does not contain selection codes. For selection, please contact the sales staff or email to sales@kewill-auto.cn to obtain a complete sample.
AD35B-Dissolved oxygen transmitter controller

Power supply

DC24V

AC220V,50HZ,5W

output signal

Standard configuration: Dissolved oxygen 4...20mA output * 2 output + relay output * 3

Standard configuration: dissolved oxygen 4...20mA*1 output + temperature 4...20mA*1 + relay output*3

Additional configuration: basic output + MODBUS-RTU RS485 communication function, which can transmit measured values ??in real time


Alternatives: Additional Equipment



No additional accessories



Matching ABS material instrument protection box



Matching 1.4301 (304) material instrument protection box (indoor)



Matching 1.4435 (316L) material instrument protection box (outdoor)
The above selection table does not contain selection codes. For selection, please contact the sales staff or email to sales@kewill-auto.cn to obtain a complete sample.

Transmitter selection table

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