RS485 220VAC Stainless Steel Probe Dissolved Oxygen Sensor of fluid-meter

Categories	Water Quality Sensor
Brand Name:	kacise
Model Number:	KBU601
Certification:	CE,FDA
Place of Origin:	CHINA
MOQ:	0-100
Price:	$0-$2000
Payment Terms:	L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability:	100
Delivery Time:	10-15 days
Packaging Details:	Common package or custom package
Temperature:	-20-60℃ Avoid direct sunlight
Supply:	220VAC±10%，50Hz
The relay outputs:	3 relays with A capacity of 220 VAC/ 2 A. The outputs can be set for alarm or timing functions
Protective grade:	polycarbonate enclosure, IP65
Field display:	LCD display with backlit
Digital interface:	RS232 or RS485 interface, Modbus protocol can be supported.

Product Details
Company Profile

RS485 220VAC Stainless Steel Probe Dissolved Oxygen Sensor

KFDO900 dissolved oxygen meter water quality stainless steel probe

Product Introduction

Fluorescence method oxygen dissolved meter is based on the quenching principle of specific substances to active fluorescence in physics.The figure as follow is the schematic diagram of the sensor's work. The fluorescent substance at the front of the sensor is a special platinum porphyrin composite with polyester foil allowing gas molecules to pass through, and the surface is coated with a layer of black light-proof material to avoid interference from sunlight and other fluorescent substances in the water.

The modulated blue light shines on the fluorescent material and causes it to excite and emit red light. Since oxygen molecules can carry away energy (quenching effect), the time and intensity of red light excitation are inversely proportional to the concentration of oxygen molecules.We used the red light source synchronized with blue light as the reference, measured the phase difference between the excited red light and the reference light, and compared it with the internal calibration value, so as to calculate the concentration of oxygen molecules, and output the final value through temperature compensation.

Performance characteristics:

No oxygen is consumed, so there is no flow rate, no agitation, and no interference by substances such as sulfide.
Lightning proof enclosure
antiflaming material
Outdoor water-proof design is suitable for a variety of installation environment
316L stainless steel probe
professional shielded cable
Ultra wide power input range:85-265VAC,Suitable for many countries and regions
digital transmission signal,strong anti-interence ability,high stability.
support analog ouput:0-20mA,4-20mA,digital ouput:RS485,modbus
Up to three relay outputs
Strong resistance to cross interference of various substances: H2S, PH, CO2, NH3, SO4, CL-, CL2, CLO2, MeOH, EtOH, and various other ions.
no need to replace electrlyte solution ,do not need to polish clean anode,cathode
low follow-up replacement cost is low,eletrode rod durable/quality light source system,durable
Built-in temperature sensor,automatic temperature compensation
There has built-in salinity compensation curve in sensor,strong consistency

Apply:
Surface water, industrial sewage and municipal sewage

Q&A

What are the factors that affect dissolved oxygen?

The content of dissolved oxygen in water is affected by two effects: one is the oxygen consumption effect that reduces DO, including the oxygen consumption of aerobic organic matter degradation and advanced metabolic oxygen consumption;The other is the reoxygenation effect that makes DO increase, mainly including the dissolution of oxygen in the air, aeration means, etc.The mutual ebb and flow of these two kinds of action makes the dissolved oxygen content in water change in time and space.

The environmental factors affecting the content of dissolved oxygen in water include water temperature, oxygen partial pressure, salinity and so on.

1. The water is warm

At a certain oxygen partial pressure and salt content, the saturated content of dissolved oxygen decreases with the increase of water temperature.The saturation content of dissolved oxygen at low temperature varies more significantly with temperature.

2. Salt

When the water temperature and oxygen partial pressure are constant, the higher the salt content of water, the lower the saturated content of dissolved oxygen in water.The salt content of sea water is much higher than that of fresh water, and under the same conditions the saturated content of dissolved oxygen is much lower in sea water than in fresh water.The variation range of salt content in natural fresh water is very small, so the salt content has little influence on the saturated content of dissolved oxygen, which can be approximately calculated by the saturated content in pure water.

3. Partial pressure of oxygen

When the water temperature has a certain salt content, the saturated salt content of dissolved oxygen in water increases with the increase of partial pressure of oxygen on the liquid surface.

Technical Parameters of Fluorescence Dissolved Oxygen Analyzer

Class	Performance	Parameter
Transmitter	Size	230×185×120mm
	Weight	1.5kg
	Storage Temperature	-40-60℃
	Temperature	-20-60℃ Avoid direct sunlight
	Relative humidity	5%~85% (no condensation)
	Supply	220VAC±10%,50Hz
	Analog output	4~20mA output or 0~20mA output (dissolved oxygen value or saturation), loop load maximum 750 ohms;Optional temperature 4~20mA output
	The relay outputs	3 relays with A capacity of 220 VAC/ 2 A. The outputs can be set for alarm or timing functions
	Protective grade	polycarbonate enclosure, IP65
	Field display	LCD display with backlit
	Digital interface	RS232 or RS485 interface, Modbus protocol can be supported.
Sensor	Measurement range	dissolved oxygen: 0.00~20.00mg/ L or 0.00~20.00 PPM air saturation: 0~200%
	Resolution	0.01mg/L
	The measurement accuracy	±1%FS or ±0.15mg/L with the largest value
	Repeatability	≤0.2mg/L
	Response time	less than 60 seconds
	Temperature sensor	Working range: 0~60°C;Resolution: 0.01°C Accuracy: ±0.5°C;Response time: less than 10 seconds
	Storage temperature	-20°C ~60°C
	Ambient temperature	-20°C ~60°C
	Medium temperature	0℃~50℃
	Maximum mounting depth	10 m
	Chemically adaptation	methanol and ethanol are safe to avoid other organic solvents
	Calibratation	Anoxic water and air were used for calibration respectively.It has been calibrated before leaving the factory, and generally there is no need to calibrate.
	Anti-interferense	It is not subject to cross interference of H2S, PH, CO2, NH3, SO4, CL-, CL2, CLO2, MeOH, EtOH, and various other ions.
	Foil	Polyester embedded with platinum porphyrin fluorescence
	Light-proof coating	teflon
	Foil life	up to 5 years (10 second measurement interval)
	Sensor shell size	45 x 100 Φ
	Weight	1.2 kg
	Cable standard	10 meters
	Sensor shell	stainless steel

Ordering Information selection table

Ordering Information selection table
KFDO900	Fluorescence Dissolved Oxygen Meter
	Power supply
	DC24V
	AC220V
		Cable length
		10m
		15m
		20m
		30m
			Signal output
			Only 4-20mA
			Only 485
			Also with 4-20mA , 485 signal output
			Special custom signal
KFDO900-	AC220V	10m	Only 485	with AC220V adapter, cable between host and sensor,The cable length is 10 meters, the sensor is equipped without temperature compensation, and is equipped with only 485 communication signal output.

Website: www.kacise.com
Phone: +86-17719566736
Email: sales@kacise.com
Location: Tangyan South Road, High-tech Zone, Xi'an City, Shaanxi Province, China

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