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 are 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.

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.

PROFESSIONAL MICROPROCESSOR METERS for many water parameters

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. Tansport boxes are available as accessoire.

The following meters are available as standard:

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).

The following models are available as standard:

Dynamic Sensor Data

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 (displayed also in % total gas satturation), 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.

MULTICHANNEL PROCESSERS for control and management

This very versatile instrument can be used as a stand-alone wirless and solar powered multi channel controller for cages, ponds, tanks and raceways, etc. If there are more than one transmitter units and a base station receiver, then the system automatically configures as a network and sends the information by low powered wireless communication to the base station. The base station has 2 alarm outputs, so it is easy to connected it to a telephone dialer or a local alarm. The base station connects to a PC via a USB, so now you have all the information displayed on your PC and all the results can be data logged.  You can add up to 50 monitor units onto the one base unit, to make a 100 channel network with no wires and no installation costs. This makes for a really low cost simple system and for the first time provides a package ideal for cages, ponds or for any installation that can not use wires. In the event that you get hit with lightening, then generally only one unit will be affected, and if it can not be repaired on-site then you simply send the faulty unit back and replace with a working unit. This means that you are in control of your own system and not dependent on service engineers.
The base station is designed to sit in an office or control room and is connected to a PC by means of a USB cable. The base station communicates with all the transmitters, collects the information and sends onto the PC to data log the information and view the data. The base station has two alarm/control relays so if any one or more of the probes detects a problem, the relays can be activated to trigger your alarm system. The PC does not need to be on for the system to control or alarm. The alarm condition and probe location will be displayed on the base station LCD. One Base station can support up to 50 oxygen transmitters and 100 oxygen and temperature probes.
The transmitter station is a solar powered wireless radio transmitter fitted with LCD display for two oxygen probes, two temperature sensors, two digital inputs and fitted with two relay control or alarm out-puts. The unit will transmit over a distance of at least 300 m. If longer distances are required a repeater may be fitted to take the distance up to 3 km or more. The transmitter is in a self contained IP65 enclosure with its own battery and solar cells. The battery alone will power the unit for 3-6 months, but with the solar cells it will not require a battery change for at least 5 years. A 230 VAC/12 VDC uninteruptable power supply, rated at 2 amps with a 5 amp internal back-up battery for the transmitter module which will the battery will keep running for around 30 days, is available as acessoire.
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 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.