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Testers WATERPROOF TESTERS for aquaria and aquaculture

These waterproof (IP67) and pocket size testers (153 mm long, 24 mm diameter, weight just 45 g) with digital display are ideal for aquaria or aquaculture and any other field applications. There are different models with replaceable electrode and automatic temperature compensation available that read conductivity or salinity (0-1999 µS EC or 0,0-199,9 ppm TDS), pH-value and temperature (0.00-14.00 pH and 0.0-50.0 ºC) or redox potential (± 1000 mV ORP) at an affordable price. The tester are factory calibrated, but can be manually calibrated and measurements are highly accurate (0.1 or 2 % or mV) with high resolution (1,00 to 0,01). The modular design allows easy electrode and battery replacement. A rugged splash-proof and floating casing prevents water infiltration. All the testers work with common batteries (3 x 1.5 V) and have a long live.

TEST BOX for the water analysis

This Compact-Laboratory box set is equiped with liquid colour analysis tests of: Oxygen (Demand + Dissolved), Hardness (Total + Carbonate + Residual), pH-value, Ammonia, Nitrite, Nitrate, Phosphate, and Temperature.

All tests ar also available as single or replacement units and additionally test sets for: Aluminium, Arsen, Lead, Chlorine, Chloride, Cyanide, Iron, Calium, Copper, Magnesium, Manganese, Nickle, Sulfate, Sulfite, Zink, Zinn etc.

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Analysers DIGITAL PHOTOMETER for various water parameters

For the necessary manual analysis, this microprocessor photolyser meter with professional concept and high precision is the right coice. Just select the required program on the foil pushbuttons. The display shows the parameter and dimesions exactly (to 2 digits behind the got). An acustic sign informs when the reaction time is finished. The results are displayed on the meter and can be stored for later processing. The meter is equipped with a RS-485 adaptor. Via an additionaly integrated RS-232 adaptor the meter can be connected to a printer or PC (cable as accessoire available). It is possible to archive over 500 stored data sets with date and time for up to 16 tanks. The meter has a 0-point-memory, which needs no new calibration. This photolyser works with 4 usual 1,5 V batteries, with integrated capacity monitoring on the meter. Alternativly accumulators or an connector for external power supply is available (as accessoire).

Reagenzia/Measurement: Aluminium 0-0,5 mg/l, Ammonia 0-0,5 mg/l, Bromine 0-10 mg/l, Chlorine 0-5 mg/l, Cloride 0-250 mg/l; Copper 0-1 mg/l, Hardness 0-500 mg/l; Iron 0-5 mg/l, Manganese 0-0,03 mg/l, Nitrate 0-100 mg/l, Ozone 0-1 mg/l, Phosphate 0-4 mg/l, pH-value 6-8 and Acid-potential 0-5 mmol, etc;

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Meters SATUROMETER to identifie gas super-satturation in water

This new handheld saturometer (Protection class IP65, with electric backlight display identifies gas super-saturation in water reliably to 400 hPa resp. mbar pressure difference, with an accuracy of 1 hPa. It works with a usual 6 x 1.5 Lithiumcells, with integrated capacity monitoring on the meter. The maintainance free sensor is compleatly sealed (Protection class IP67, Signal outlet 0-5 V). As option also an oxygen sensor can be connected to the meter. The gas bubble disease is very often present undetected and leads to significant damage in the fish stock. If fish are being exposed to oversaturation continuously, they will suffer from it no matter which gas contributed most to the supersaturation! In experiments it was proven, that a continuous charge with only low levels of supersaturation has a significant negative impact on the fish immune system. A fishstock infected with IPN (Infectious Pancreas Necrosis) produced losses of 10-15 % after 90 days whereas fish from the same stock epxosed to supersaturation showed a mortality rate of 65 %. The gas bubbles themselves cause a lot of direct damages like lesions and embolies. Those alone are lethal in some cases. But in every case they open the door for secondary infections which can not be repelled by a weakened immune system. Another typical sample is a trout breeder who reported fin rot and saprolegnia on the fish body. Measures showed a gas pressure of 45 hPa which equaled to 105 % gas saturation. It may not sound high but the pectoral fins were severely damaged by gas bubble lesions. The fin rot and fungus (Saprolegnia) were clearly produced by an undetected gas oversaturation.

PROFESSIONAL MICROPROCESSOR METERS for oxygen, pressure, temperature, salinity, conductivity, ph-value and redox potential as well as flow

All this electronic GMH devices have a size of 142 x 71 x 26 mm (LxWxD) and a weight of approx. 155/255/300 g (incl. battery/sensor), and have a LCD doubble display for measured values and temperature, min-/max-value memory, configurable automatic switch-off function (1-120 min), hold-function, foil pushbuttons, automatic temperature compensation, 12 mm ø sensores, serial connetion, 9 V battery with warning and external energy connector.

The following meters are available:

Typ/Model GMH 33 Flow meter GMH 34 Conductivity meter GMH 35 PH-value meter GMH 36 Oxygen meter Measurement: Flow: 0,05 ... 5,00 m/sec

Conductivity: 0 ... 2000 µS/cm; Temperature: 0 ... 85 °C; Option: Salinity: 0 ... 70 mg/l; Resistance: 0,005 ... 100,0 kOhm;) PH-value: 0 ... 14; Temperature: -70 … +250 °C; -94 …+482 °F; Option: Redox: (ORP): -1999 ... +1999 mV, 0,0 ... 70,0 rH; Oxygen: 0 … 30 mg/l (ppm), 0 … 200 %(sat); Temperature: 0 … 50 °C; Option: Air-Pressure: 0 … 1200 hPa, (0 … 900 mmHg); Precision: ±1Digit; ±1,0% f. SV ±3,0% f. MV Conductivity: ±0,5% f. MV ±0,3%FS; Temperature: ±0,2% f. MV ±0,3K; ±1Digit; ±0,01pH; ±0,1mV, rH; ±0,2°C; ±1Digit; ±1,5% (mg/l or %); ±0,5% FS (mbar); ±0,1°C (°C); Sensor: 5 m cabel and connector 1 m cabel fixed to the meter 1 m cable per sensor 4 m cabel and connector (other sizes on request) Other: Air and Wind measurement on request Automatic conductivity measurement in the optimal range. Automatic or manual temperature depending 2- or 3-point calibration. Manual pressure and salinity compensation  (automatic with option).

DATA COLLECTING SYSTEM for GHM meters

In connection with a PC, a meter of the GMH-seria, the PC-interface adaptor (Accessorie) and this software, a comfortable and reasonable data collecting system can be build (registration of data also over many years possible).

The software includes two modules: “Schreiber” (Writer) and “Datenanzeige” (Data display). Modul “Schreiber”: Displays the data as y/t-diagram. Modul “Datenanzeige”: Scanning of collected measurement values and display as y/t-diagram. System requirements:: IBM compatibe AT, min. Pentium II, approx. 20 MB free disk space, 3.5” floppy disc drive, VGA graphic card, Windows 3.1 or higher, serial connection “COM1” or “COM2”.

GRAPHIC MICROPROCESSOR METERS for oxygen, temperature, pressure and ph-value

This "OxyScan" micro dissolved oxygen meters are specially developed for the use in aquaculture and limnology. Through the very stable splashproof cover made from ABS plastic and the delivery including plastic transport case as well as the plastic sensor (14 mm Ø, 150 mm long with 2 m cable and connector) with a very long sensor life (approx. 2 years standby time, physically) they are perfect for field work. The full graphic display makes the result clear and fast visible. The short polarisation time (approx. 30 sec. max. 5 min.), the low flow current sensitivity (1 % at 5 cm/sec.) as well as the air-pressure and temperature compensation in the range of 5 - 40 °C makes working easy. The automatic calibration with the included calibration chamber is an additional feature. A free-configurable switching output (24 V DC / 2 A or 230 V AC / 1 A) and exact analogue output or an extended measurement range (up to 199,9 mg/l) are options for all these meters. This meters can also be configured as you wish, e.g. storage, specific control-logic (with switch outputs), customer-specific data format, but it is also possible to extend this system anytime. As options are also available: stainless steel sensors 4,7 to 5,4 mm Ø, 80-400 mm long with 1,5 to 5,0 m cable and connector (other cable lenths on request).

Typ/Model OxyScan "light" OxyScan "graphic" Measurement: Oxygen (0.0-19.9 mg/l and 0.1-199.9 %sat), Temperature (0.0-50.0 °C); Oxygen (0.0-19.9 mg/l and 0.1-199.9 %sat), Temperature (0.0-50.0 °C), Air-Pressure (150-1150 mbar); Precision: +/-1 digit; (0,1 mg, 0,5 %sat, 0,5 °C) +/-1 digit; (0,1 mg, 0,5 %sat, 0,5 °C, 10 mbar) Display: Large full graphic-display with 120 x 32 pixels, Memory function for up to 50 single-values, displayed directly on the display as diagram or single values

Huge full graphic-display with 128 x 64 pixels, diagrams show the last 30 values; Memory function for up to 4000 seria-values, displayed directly on the display as diagram or table; Measurement intervals from 2 seconds up to 10 minutes, starting time and date to set Furnish: Manual atmospheric pressure compensation; Standard (9 V DC) battery for approx. 500 h; Battery warning on the meter

Automatic atmospheric pressure compensation; NiMH-accumulator, 2100 mAh (Operating time > 24 hours); Inclusive fast-charger (charging time about 4 hours); Battery-monitor on the meter; Memory keeping (memory active up to 6 months, depending on the measurement period); Real time clock with date function; Wireless Infrared-Interface capability for connection with infrared devices; Options: RS-232 interface for transmitting actual and saved measurement values to PC, notebook or printer etc.; Connector for external power supply with (8.2 V DC) accumulator Infrared-receiver with RS-232 adaptor for non infrared devices; Single value memory function; Illuminated display (backlight); PH-value or Redox measurement

Dynamic Sensor Data

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Processers MULTICHANNEL PROCESSERS for control and management

Automated monitoring and control removes the information gap that exist with manual data collection, lower labour costs and allow to operate the aerators exactly then when they are needed. One of the biggest advantages of automated monitoring is that it provides critical data continuously and reduces the chance of human errors. Continuous monitoring and control maintains the environment ideally suited for optimal fish growth and production, and reduces the stress in both fish and workers. Traditional metering and monitoring equipment keeps dissolved oxygen levels within certain fixed limits. This system enables to vary oxygen levels as desired, to suit the fish, the feed and the time. The desired levels have just to set and the system will automatically ensure that the orders are carried out. The optional extensive logging facility store data, so that every time it is to see what happened and changes can be made if needed.

The main unit is a small yet powerful microprocessor controlled system, and is build on a modular basis. It accepts up to 8 analogue inputs (i.e.: for oxygen and temperature), and has galvanic isolated control and alarm outputs (4-20 mA). The system performs measurement, alarm and regulation functions ensuring safe operation, maximum feed utilization and livestock growth. Optionally the system can be extended to a powerful registration and data logging tool, where a PC can be connected, from which observation of records and copying or logging of data can take place. It is a stand alone unit that does not depend on a PC for correct operation and can operate (and be configured) without a PC. The unit can also be connected to a 24 V battery pack to ensures that the system remains operating after mains failure. The compact system is built into a plastic box (dimensions 36 x 15 x 31 cm) and has a weight of just 5 kg (Protection class IP 55/Nema 4). The robust and easy to use (60 mm large) oxygen probe is a self polarising membrane covered galvanic cell that generates an electrical signal proportional to the oxygen pressure it senses, no matter whether it is in water, air or another medium. It is connected using ordinary 2-core cable, which can have any length (up to 1000 m) and does not need an external supply because it makes its own electricity. Cleaning the membrane (with a cloth or tissue) is, apart from an occasional calibration, the only routine maintenance necessary.

Other meters and regulators on request!