REAGENTS FOR ANALYZING PURPOSES, STANDARD AND BUFFER REAGENTS FOR CALIBRATING MEASURING AND ANALYZING DEVICES

ELECTRONIC MEASURING, SIGNALING AND TESTING DEVICES, namely, ION SELECTIVE ELECTRODES; ORP SENSORS FOR MEASURING A REDUCING OR OXIDIZING STRENGTH OF A SOLUTION; IONMETERS; SENSOR EXTENSIONS AND HOLDERS; FLOW-THROUGH ADAPTERS; ANALYZERS FOR MEASURING THE CONTENT OF CHEMICAL OR BIOLOGICAL MATERIAL IN WATER OR WASTE WATER, AND WATER FILTERS FOR USE THEREWITH; FIELD MONITORS FOR ON-SITE MONITORING AND ANALYZING OF BOD, PH-VALUE, AMOUNTS OF OXYGEN AND OTHER CHEMICAL SUBSTRATES IN LIQUIDS; METERS, MONITORS AND SENSORS FOR MEASURING OXYGEN, TEMPERATURE, PH RANGE AND CONDUCTIVITY; BOD SENSORS FOR MEASURING THE BIOLOGICAL OXYGEN DEMAND; SENSORS FOR DETERMINING SOIL RESPIRATION, BIODEGRADATION, BIOGAS, DETERMINATION, ANAEROBIC DEGRADATION AND MICROBIOLOGY; MEASUREMENT DEVICES FOR SOIL RESPIRATION RATES; [ COLONY COUNTERS; ] PHOTOMETERS; TURBIDITY METERS; [ MULTIPLEXERS; ] MULTIPARAMETER METERS FOR LIQUID, WATER AND WASTE WATER ANALYSIS; STIRRERS, NAMELY, AN ELECTRICALLY ACTUATED STIRRER FOR STIRRING A LIQUID SAMPLE IN A TEST CONTAINER OR HAVING AN ACTUATED STIRRING MECHANISM COACTING WITH AN ELECTROMAGNETIC STIRRING ELEMENT THROUGH THE CONTAINER WALL; THERMOSTATING CHAMBERS, NAMELY, ELECTRICALLY HEADED AND/OR COOLED CHAMBERS TO KEEP TEST SAMPLES AT A DESIRED TEMPERATURE; ELECTRICAL SENSORS; ANALYZERS FOR NITRATE, NITRITE, AMMONIA, AMMONIUM, PHOSPHATE, TOTAL PHOSPHATE AND OTHER CHEMICALS COMPRISED IN WATER OR WASTE AND FOR A COMBINED MEASUREMENT OF THESE PARAMETERS; [ SOFTWARE, PRINTERS, CONNECTING CABLES AND MEASURING STATIONS FOR MEASURING DEVICES FOR MEASURING BOD, TEMPERATURE, OXYGEN CONTENT AND THE CONTENT OF CHEMICAL SUBSTRATES IN LIQUIDS, ESPECIALLY WATER AND WASTE WATER; ] ADAPTERS FOR CONNECTING SENSORS TO CABLES AND MEASURING DEVICES; [ COMPUTER PRINTERS AND COMPUTER CABLES FOR COMPUTER AIDED MEASURING DEVICES OF THE ABOVE MENTIONED TYPE ]