0.00 - 20.00mg/L Online Luminescent Dissolved Oxygen Analyzer / Meter - LDO10AC
1. Application
Continuously monitor DO in municipal and industrial wastewater treatment process
• Sewage plant
Aeration tank,collection well,aerobic digestion tank,outlet
• Power plant
Water/wastewater treatment process
• Surface water
Rivers,Lakes/Streams,ocean
• Aquaculture
Sea cages, land-based pond
• Other industries
Food industry,Chemical industry
2. Features and Benefits
• Based on the innovative principle utilizing fluorescence to measure dissolved oxygen, the sensor does not require frequent replacement of membranes and needs low maintenance.
• The Measurement does not consume oxygen, stir or flow is not required, and unaffected by H2S,pH, K+, Na+, Mg2+, Ca2+, NH4+, Al3+, Pb2+, Cd2+, Zn2+, Cr, Fe2+, Fe3+, Mn2+, Cu2+, Ni2+, Co2+, NO3-, SO4-2, S-2,
PO43+, Cl-.
• Digital sensor has good anti-interference performance and high stability, and the cable length is available in hundreds of meters.
• Connections between the sensor(s) and the transmitter are “plug and play”, and multi-channel transmitter operates either 1 or 2 sensors.
• Modbus RS485/RS232 or Profibus DP network connection for data transmission is Optional
• The menu is available in Chinese or English.
• 3 Relays with programmable hysteresis povide high-limit alarm, low-limit alarm or timer.
• A built-in data logger with the capacity to store data for up to 10 years collects measurement data at user selectable intervals.
3. Specifications
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Performance characteristics
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Measuring Range
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0.00~20.00mg/L, or 0.00~20.00ppm, 0 to 200% saturation
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Resolution
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0.01mg/L,0.01ppm
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Accuracy
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±0.1ppm,±0.1mg/L
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Sensitivity
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±0.05% of span
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Response time
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90%<30s, 95%<90s, at 20ºC
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Temperature compensation
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automatic (NTC30KΩ)
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Calibration
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Factory calibrated, also can be calibrated by customer on site
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Display
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LCD displays data including date, time, measurement value, trendline, etc., English menu
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Data storage
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Auto-save function(Automatic Data Storage for up to 10 years,), power-off data protection
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Outputs
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Analog Outputs
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Two isolated 0/4-20 mA output( maximum load 800 ohms), optional selection of 3.8mA or 21mA(under the condition of malfunction)
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Relay outputs
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3 Relays with programmable hysteresis, alarm or timer function optional
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Relay capacity
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2A, 250VAC
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Digital Communication
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MODBUS RS232/RS485,Profibus DP is optional
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Power supply
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AC power supply
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85~265 VAC, 50Hz/60Hz
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DC power supply
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24 VDC ±10%
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Physical parameters
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Dimension of Transmitter
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270×205×100mm(W×H×D)
(10.6*8*3.9 in.)
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Dimension of Sensor
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Φ45×118mm (1.8*4.5 in.)
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Materials
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--Transmitter: PC
--Sensor: 316L stainless steel
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Process connection of sensor
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1 inch cone male thread
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Environmental conditions
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Ingress protection
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--IP66 (transmitter)
--IP68 (Sensor)
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Operating Temperature
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--Transmitter: -20~60℃
--Sensor: 0~50℃
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Ambient Relative Humidity
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0 to 95%, non-condensing
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Operating Pressure
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≤7.5Bar
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4. Ordering Information
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Ordering Information
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Transmitter Selection
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Channel number
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Signal output
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Power version
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LDO
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code
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meaning
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code
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meaning
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code
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meaning
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1
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Single channel
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0
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4~20mA
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AC
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220VAC
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2
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Dual channel
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1
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RS 485(Modbus)
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DC
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24VDC
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2
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RS 232(Modbus)
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3
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Profibus DP
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Example:
LDO10AC, single channel dissolved oxygen transmitter, output 4~20mA, 220V AC Power
supply.
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Sensor Selection
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Install mode
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Cable length
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LDO-S
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code
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meaning
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code
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Meaning
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0
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Immersion installation
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C10
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10m cable
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CXX
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XXm cable
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Example:
LDO-S0C10, a LDO sensor, immersion-typed install , with 10m cable.
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(3) Accessories
FA0000: Immersion mounting bracket, stainless steel
FA0001: Immersion mounting bracket, PVC
FA0010: Insertion mounting bracket, stainless steel, with DN50 stainless steel cut-off ball valve
FA0020: Stainless steel floating ball mounting bracket
FA0021: PVC floating-board mounting bracket
FA0031: Circulation mounting accessory, PVC
FA0900: Stainless steel adapter
FA0901: PVC adapter
FA0800: Instrument protective housing, stainless steel
FA0810: Instrument protective housing, stainless steel, with heater unit
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