Measurement Integrity
All of the ARGEs sensor range have the serial numbers and the last calibration date stored internally. The user can access this information for reporting purposes. The sensors can be redeployed at any time with the calibration and serial number records are retained in the sensor.
Online Hydrocarbon Monitoring Sensor
Designed to detect Anthracene, Fluoranthene, Pyrene, Naphtalene, Acenaphtylene, Fluorene, Phenanthrene, Benzoanthracene, Crysene etc.. other PAHs. The ARGES Hydrocarbon Sensor by Keynes Controls measures the sum of hydrocarbons present in a water sample, such as a river or drain. These PAHs are present in petroleum products and therefore form an excellent tracer for determining the amount of hydrocarbon pollution in water. Hydrocarbons are a class of concerning contaminants that can cause a severe threat to human health and cause direct or indirect harm to aquatic organisms and ecosystems.
The ARGES Hydrocarbon Sensor by Keynes Controls has been designed to be used as a stand-alone laboratory instrument, and as part of a multi-parameter device inside a multi-parameter SONDE which is an ideal tool for Ideal for fixed installation monitoring applications.
Advantages
- Direct results in Engineering (SI) Units
- Real-time measurements
- Automatic temperature compensated readings
- Built-in Digital Networks
Applications
- Water Quality Measurements
- Pollution reporting applications
- Biological Treatment Plant Protection
- PAH measurements in process water
Hydrocarbons can enter water bodies via deposition from the air or surface run-offs following rainfall, particularly where high levels of pollution may be present. Urban run-off is a significant contributor to the levels of hydrocarbons that flow into waterways. This is significantly higher near to industrialised and densely populated areas. Natural processes, incomplete combustion and other human activities have led to the build-up of hydrocarbon pollution in the environment.
Some hydrocarbons are known to be carcinogenic and are classed as priority hazardous substances under various national Water Framework Directives. When there is an increase hydrocarbon pollution of the water there is frequently a large increase in turbidity.
The ARGES sensors can be used to monitor the levels hydrocarbons and Turbidity in a single sensor package.
Hydrocarbons:
The ARGES Hydrocarbon Sensor by Keynes Controls is meticulously crafted to accurately and sensitively detect contaminants such as Anthracene, Chrysene, Fluoranthene, Fluorene, Naphthalene, and Pyrene. This advanced sensor technology of The ARGES Hydrocarbon Sensor by Keynes Controls not only detects the presence of these substances but also pinpoints the concentration, indicating how swift and efficient the environmental intervention needs to be.
Chrysene
Anthracene
Fluoranthene
Chrysene
Naphthalene
Pyrene
Calibration Period
All of the ARGES sensors are factory-calibrated before shipment. Keynes Controls recommends a check calibration every year. For improved results the sensor should be calibrated at, or close to the temperature for which it will be deployed. A precision temperature sensor is built into the sensor to aid in these measurements. Multi-point calibration can be used with this instrument
Keynes Controls offers 1,5-Naphthalenedisulfonic acid disodium salt dihidrate for ARGES Hydro-carbon sensor on the online shop. There is a finite life for these solutions and Keynes Controls recommends replacement after use. Keynes recommends the calibration solution be kept cool and in the dark when not in use.
When calibrating the low level value using distilled water make sure separate cups are used for 1,5-Naphthalenedisulfonic acid disodium salt dihidrate solution and distilled water.
Calibration Instructions
To properly calibrate The ARGES Hydrocarbon Sensor by Keynes Controls, use a 10ppm calibration solution of 1-5 naphthalenedisulfonic acid disodium salt. This solution contains naphthalene, an aromatic hydrocarbon with fluorescence characteristics similar to many Refined Oils.
The 10ppm calibration solution should be freshly prepared by serial dilution from pure 1-5, naphthalenedisulfonic acid disodium salt. When calibrating the hydrocarbon sensor with naphthalenedisulfonic acid disodium salt, the readings given will be in μg/L (ppb) naphthalene
A two point calibration procedure is used with this sensor. Enter a low level and high level parameters directly into the sensor. The instrument stores the calibration factors and undertakes the measurement conversion into the SI units,
QLOG - Applications Software
Free Windows application software is available with this product.
The Keynes Controls Q-LOG software enables the use to make configuration changes, calibration changes, display and record measurements. Information is stored into CSV text files suitable for analysis in
Optional Accessories
The ARGES Hydrocarbon sensor can be installed with any of the other chemical sensors into the multiparameter housings. The optional USB media converters can be used to connect the multi-parameter sensor array directly to a Windows PC. The PC USB port can power the sensors directly making testing a very simple operation
Product Features
| TYPE | RANGE (Typical levels) |
| Solid state ISE sensor | |
| Concentration range: | 0.0 to 1000 NDSA ppb - Other ranges on request. |
| Resolution: | 0.01 NDSA ppb |
| Excitation | 365 nm |
| Stand-alone and SONDE Multi-parameter operations |
|
| Calibration Period | Approximately 2 years |
| Warranty Period | 2 years |
| pH Range | 0 - 14 |
| Operation | Fluorescence |
| Built-in Digital Communications | SDI12 / RS485 / MODBUS Digital Communications |
| Depth | 200 m |
| Simple Calibration | Multi-point Calibration Point Optional |
| SI Units | NDSA ppb, Degree C |
| Analogue Output | 0-2 V DC - proportional to concentration |
Factors adversely affecting measurement accuracy using fluorescence include:
- Interference from compounds which fluoresce at similar wavelengths.
- Differences in the fluorescent response caused by temperature effects.
- Differences in the fluorescent response caused by ambient light.
- Interference caused by turbidity.
The Hydrocarbon fluorometer is commonly deployed with with additional sensors that can be used to monitor additional parameters that affect the fluorescent response of the liquid under investigation such as Turbidity and pH.
The images below show a Exeter University student undertaking real-time water quality testing involving the measurements of PAH (Hydrocarbons), Tryptophan, Turbidity, CDOM/fDOM, Conductivity and pH in a local Berkshire river.
The photos show the information being recorded to a PC. The sensors can be connected directly onto a wide range of different recording and processing devices.
The ARGES Hydrocarbon Sensor by Keynes Controls can be installed into any combination of the ARGES sensors can be installed into 3-Sensor and 7-Sensor SONDE housings and connected to a data acquisition system via the gold plated wet mate subsea connector mounted on the top of the housing. A brush system is available for the SONDE to clean the sensor optics prior to a measurement operation.
The image above shows the Hydrocarbon fluorometer and pH sensor installed into a 3 Sensor SONDE Housing.
Product Specifications
| HYDROCARBON SENSOR | ENVIRONMENTAL CHARACTERISTICS | ||
| PAH Range: | 0..1000 ppb / 0..100 ppb (Optional) | Ambient Range: 0 - 50 Degree Celsius | |
| Oil | 0.. 1.5 ppm 0..15 ppm | Water Temperature: 2 to 60 Degree Celsius | |
| Light Source | LED - 254 nm | ||
| Measurement Principle: | Fluorescence | ||
| Parameter : | PAH Filter 360 nm | ||
| Resolution | 0.1 ug/L | Built-in Temperature Sensor | |
| Accuracy | ± 0.3 ug/L | Water Temperature: 1 to 50 °C | |
| Storage Temperature 0 - 60 °C | |||
| PHYSICAL DIMENSIONS | |||
| Fast Start Time | <0.5 Sec | Length x Diameter: 22 x 220 mm | |
| Weight: 97 g | |||
| Sample Time | 1 sec | Maximum Depth : 200 m | |
| Wiper Trigger | SDI12 Command | ||
| Built-in Network Types: | |||
| Full Digital Operation | SDI12 / RS485 / MODBUS Digital Communications | ||
| Power Requirement | |||
| Simple Calibration | Built in compensation curves | Voltage Range: 10-18 V DC | |
| NDSA | SI Units - ppb / Degrees Celsius | Standby Current: 0.8 mA Typical | |
| Free Windows Applications Software | QLOG | Measurement: 30 mA Typical | |
| Warranty period: | 2 years UK / European Union | ||
| Calibration period | 2 years |
Supported Commands
Most Used Commands - SDI12
| Description | Master | Instrument Response |
| Start measurement | aM! | a05\r\n where 05 = time delay before measurement sent |
| Send ID | al! | a14KEYNESCOISOHYDR14\r\n Part description assigned by Keynes |
| Address Query | ?! | Where a = ID number - 0 - 9 (standard) / (a..z) Enhanced SDI-12 0 - 9 / a - z for RS485 |
| Change Address | aAb! | where a = Initial address and b = Final address |
| Start Measurement | aM! | Make a measurement - a = address of sensor Example 1M! starts a measurement for sensor with ID=1 |
| Concurrent measurement: Used for starting a measurement for all the sensors in a SONDE or on a digital network. |
aC! | Start a measurement for sensor on address 'a'. |
| Read Serial Number | aXSN! | Instrument Response a+Serial-number |
| Calibration Date | aXCD! | Instrument Response a+date |
Built-in Communication Options
All of the ARGES range of sensors support SDI-12, RS485 and MODBUS digital communications as standard enabling the sensors to be directly connected to data loggers for remote web based reporting, onto Wi-Fi and Local Area Networks using the RS485 option, and directly into SCADA applications using the MODBUS. Keynes Controls optional USB interfaces that are used to power and connect a sensor directly a Windows PC.
MODBUS Operations
ALL of the ARGES range of chemical sensors support MODBUS network operations The sensors act as a slave unit only and can communicate to suitable controllers and SCADA systems that support the MODBUS Protocol. The sensors support 16 and 32 bit registers. .
The ARGES sensors can be connected to a PC based system using the optional USB-485-Pro media converter. This device can power the chemical sensor and supports the correct timing protocols for data transmission for MODBUS and standard RS485 network communications
WARNING:
Favourable measurements made by this equipment do not guarantee that a water sample is safe for human or animal consumption. The ARGES sensors can not detect the presence of harmful bacteria or toxins. If in doubt, ALWAYS TREAT SUSPECT WATER PRIOR TO CONSUMPTION
Additional Information:
Related Products by Keynes Controls: ARGES pH, ARGES Tryptophan, ARGES Conductivity, ARGES Turbidity, ARGES Hydrocarbon, ARGES CDOM, Dissolved Oxygen.
Key Words Related to Identifying Our Products or Intended Product Use or Product Outcome: Water, H2O, Water Disinfection, Water Sterilization, PAH, Polycyclic Aromatic, Hydrocarbons, petroleum petrol. Updated by Kathryn Thomas