Z900 Algal Online Monitor is a flow through, portable and robust device for online detection and continuous monitoring of photosynthetic microorganisms in both natural and artificial water bodies. It detects and discriminates among variety of cyanobacteria, green and brown algae, diatoms, and other microbes. Its ultra-high sensitivity (30 ng Chl/l) allows early detection of very low concentrations of these organisms.

Measured / Calculated Parameters:

• FT : Instantaneous Fluorescence
• QY: Quantum Yield
• OJIP – Fix Area: total area above the OJIP fluorescence transient. This parameter correlates with total change of fluorescence signal in OJIP protocol, with total pigment content and hence with cell concentration.
• OD measurements at 680 and 720nm

Features:

• Ultra-high sensitive, flow-through monitoring.
• Detection limit 30 ng Chl/l.
• Wide range of detected organisms: cyanobacteria, green and brown algae, diatoms, and other microorganisms.
• Variable excitation colors.
• Turbidity measurement.
• Device modifications for phycoerythrin or phycocyanin (optional).
• Ability to activate alarms/pumps when threshold values of measured parameters are reached
• rugged construction for field use

Applications:

• Water treatment monitoring.
• Early detection of potentially harmful algae blooms.
• Effective control of water treatment chemicals.

FluorPen 1.0 Software

• Real-time data collection for online measurements.
• Both internal data storage and external communication.
• Data export to Excel for analysis or visualization applications.
• Windows 2000* and Windows XP* compatibility.

FluorPen graph and data window

Technical Specification:

• Measured Fluorescence Parameters: FT, QY, OJIP – Fix Area
• Detection Limit: Algae – 10 cells/ml, Cyanobacteria – 100 cells/ml
• Actinic and Saturating Light Intensity: Adjustable from 0 to 3,000 µmol(photons)/m².s
• Measuring Light Intensity: Blue (455 nm) and red (630 nm) measuring light adjustable by intensity, Blue (455 nm) and amber (590 nm) measuring light adjustable by intensity
• Detector Wavelength Range: PIN photodiode with 660 nm – 750 nm bandpass filters
• Sample Compartment: Flow-through cuvette made of quartz glass
• FluorPen 1.0 Software: Windows 2000, XP or higher
• Bios: Upgradeable firmware
• Communication: Serial RS 232, RS 485
• Display: AOM 2800: 2 x 16 characters LC display, AOM 2700: without display
• Memory Capacity: 4 Mb – up to 100,000 data points (about 300 OJIP curves)
• Power Supply: 24 V (optionally 12 V)
• Power Saving Mode: Automatic
• Case: IP65
• Temperature Range: 0 to 45 ºC
• Dimensions: 20 x 23 x 11 cm
• Weight: 3.4 kg

Qubit’s S165 pH Sensor can be substituted for any traditional pH meter. The advantages are trifold: automated data collection, graphing and data analysis using the C410 LabPro Interface and C901 Logger Pro Software. For field work, it can be used with a Palm hand-held computer and C915 Palm/Data Pro software.

• materials: Sealed, gel-filled, epoxy body, Ag/AgCI
• Response time: 90% of final reading in 1 second
• Temperature range: 5 to 80^oC
• 12 mm Outer Diameter
• pH range: pH 0 – 14
• 12 bit resolution (with LabPro Interface) 0.005 pH units
• Isopotential pH:  pH 7
• Output: 59.2 mV/pH at 25^oC
• warranty : 2 years

The pH sensor is factory-calibrated. If re-calibration is required, it is a simple two point procedure using buffer solutions. Qubit can supply a buffer kit including 4 tablets each of buffer pH 4, 7, and 10. Each tablet is added to 100 mL of distilled water to prepare respective pH buffer solutions.

Applications include:

• Acid-base titrations
• Investigations of acid rain and buffering
• Investigations of water quality in streams and lakes
• Monitoring pH change during chemical reactions
• Monitoring pH changes in an aquarium as a result of photosynthesis

D950 Waste Water Respirometry System is a single or multi-channel systems for automated respirometric measurements of activated sludge or waste water samples.

Fiber optic oxygen sensing technology with online temperature compensation and control, provides unbeaten temporal resolution and precision of data.

Particularly good for research, diagnostics or process optimization.

Oxygen optodes (sensors) are unaffected by stirring, pressure, CO2, H2S, ions, solutes etc. – no cross-sensitivity or poisoning.

User-friendly software and USB instrumentation for effortless operation, sensor calibration, data acquisition, calculations, graphs, analysis and statistics.

Applications:

• OUR (oxygen utilization rate)
• Short-term BOD (biological oxygen demand)
• Activated sludge analysis
• Waste water analysis
• Respiration inhibition
• Toxic effects of influents
• Laboratory respirometry
• Substrate/feed/nutrient effects
• Sludge monitoring
• Oxygen and temperature measurements and regulation

Included (single channel system):

• Data acquisition instrument for USB interface
• AutoResp™ software for Windows
• Fibox 3 fiber optic oxygen instrument for mini sensors
• Fiber optic oxygen mini sensor
• Water temperature monitoring and control system
• Oxygen analyzer and regulator system
• User manual

Optional:

• Customer specified chambers/reactors made in glass, stainless steel or plastic materials
• Multichannel temperature controllers for independent monitoring and regulation of samples
• Stirrers, hotplates, refrigerated baths

Specifications:

• Operational modes: cyclic or triggered by O2 set points (min/max)
• Data resolution: 16-bit (full optical insulation)
• Sampling frequency: 1 Hz (1-channel); 2 Hz (4-channel)
• Sensor response time: <20 sec (T90)
• Sensor accuracy: 1% air sat.
• Calibration: 2-point (sodium sulphite or N2, and air/O2)
• Files: txt and csv (Excel)
• PC interface: USB
• OS: WinXP/Vista/Win7
• Power: 110V/60Hz or 230V/50Hz

This automated feedback system will determine pCO2 indirectly as water pH, and regulate pCO2 or pH to a level set by the user. The user-friendly windows software makes it possible to monitor calibrated values for pH and pCO2 in a real-time semi log plot (log pCO2 vs. pH), and control either to set point levels automatically.

With optional accessories this system will also regulate water temperature or pH/pCO2 in up to four different tanks or aquaria.

Applications range from studies of ocean acidification, water chemistry, effects of hypercapnia in aquatic organisms, and normocapnic control in recirculated or closed tanks and aquaria.

Included:

• WTW pH 3310 SET incl. SenTix 41-3 probe, buffers, suitcase and USB cable
• Digital relay instrument with USB interface (DAQ-S)
• Suitcase
• Solenoid valve
• Push-in fittings
• PU air tubing
• Air stone
• User manual

TYPICAL EXPERIMENTAL SETUP

Features:

• pCO2 is monitored indirectly as water pH, and regulated by injection of 100% CO2 gas or air
• A pH 3310 instrument and probe from German WTW is connected to your pc via USB
• User-friendly software for Windows, allows you to calibrate, graph, record and regulate water pH or pCO2 values to pre set values, e.g. for normocapnic or hypercapnic control
• USB instrument with build-in digital relays, complete with a solenoid valve and fittings, will control injection of CO2 gas or other gasses
• The relationship between pCO2 and pH is obtained by measuring pH in water equilibrated with two different pCO2 partial pressures, e.g. use a gas mixing pump (Woesthoff) or special lab gases

WTW pH 3310:                    pCO2 calibration:

Optional:

• SenTix H pH electrode + cable for measurements in sea water.
• D203 for water temperature regulation.
• One extra D202 and one extra WTW pH 3310 SET for independent pH/pCO2 regulation in one more tank/aquarium.

The following references used the same technique to control pCO2.

D.J. McKenzie, A.Z. Dalla Valle, M. Piccolella, E.W. Taylor and J.F. Steffensen. 2003. Tolerance of chronic hypercapnia by the European eel (Anguilla anguilla). J. exp. Biol. 206: 1717-1726.

D.J. McKenzie, E.W. Taylor, A.Z. Dalla Valle and J.F. Steffensen. 2002. Tolerance of acute hypercapnic acidosis by the European eel (Anguilla anguilla). J. Comp. Physiol. B 172: 347-354.

Cruz-Neto, A. and Steffensen, J. F. 1997. The effects of acute hypoxia and hypercapnia oxygen consumption of freshwater European eel, Anguilla anguilla L. J. Fish Biol. 50; 759-769.

This single-channel temperature system includes everything needed to monitor and control water temperature. The instrument’s analog output allow for temperature data acquisition.

A large display, two digital relays for valve control, menu-driven settings and an analog output for data acquisition, makes this system user friendly and well suited for a range of lab applications.

Example – Cold water control. The temperature set point value is compared with measured values. If the temperature is higher than the set point value the digital relay activates the pump which flushes cold water through a stainless steel coil inside the ambient water tank. When the temperature reaches the set-point, the pump is turned off.

Controller Specifications

System includes:

• Controller Instrument
• Pt100 Temperature probe (5 m)
• Stainless steel heat-exchanger coil
• Submersible pump, 10 L/min
• Soft PVC tubing (5m) and fittings
• Analog output cable for data acquisition (0-5 V)
• Adapter cable for pump
• Power cable
• User manual
• Carrying case

System excludes:

• Cooling bath/heater

The D202 Oxygen Regulation System is a complete system that will monitor and regulate oxygen saturation in sea or fresh water, e.g. for normoxic, hyperoxic or hypoxic control in fish tanks, aquariums etc.

A large display, two digital relays for valve control, menu-driven settings and an analog output for data acquisition, makes this system user friendly and well suited for a range of lab applications.

Example – Hypoxic control. The oxygen set point value is compared with measured values. If the oxygen saturation is higher than the set point value the digital relay activates the solenoid valve to open for injection of nitrogen gas (gas bottle not included).

System Includes:

• D201 controller instrument
• D901 Miniature Galvanic DO2 probe and maintenance kit
• Preamplifier with galvanic isolation
• Solenoid valve for O2 and N2 (24, 110 or 230V)
• Air tubing (6/4 mm)
• 1/8″ fittings
• Ceramic diffuser
• Analog output (0 – 5V)

System Excludes:

• Pressure bottle and regulator for N2 or O2

Suggested set up of D202:

Controller (D201) Specifications

IMPORTANT: DO NOT connect relays to >500W equipment (max 2 A, 250 V).

Mini-DO probe(D901) specifications:

D112 is a research-grade flow measuring equipment from Höntzsch, includes a Vane Wheel Flow Sensor and a Handheld HFA Flow Meter. This instrument is ideal for calibrating the motor inside a swim tunnel, or any other flowing water source.

Included:

• Digital flow meter
• Stainless vane wheel flow probe
• User manual

Vane Wheel Flow Sensor

• Material: Stainless steel
• Diameter: 30 mm
• Flow range: 0.01 – 3 m/s in depths of 20 – 150 mm
• Includes a probe extension for depths of 150 – 500 mm

Handheld HFA Flow Meter

• Hand-held digital flow instrument
• High-contrast LCD (liquid crystal display)
• RS-232 interface for direct transfer of stored values to a PC
• Instantaneous flow values every second
• Display units: m/s, m³/h, L/min (optional °C)
• Battery-operated by 9 V compound battery or alternatively by main supply circuit
• Analog output
• Data and measured value storage for 500 data records