KELLER AG FÜR DRUCKMESSTECHNIK is a provider of products and services such as liquid level switches, ultrasonic,signalling - systems and installations,vehicles - telematics,image analysers,gas or oxygen depletion sensors,sensors for liquid concentration monitoring,testing equipment, pressure of portable fire extinguishers,temperature and humidity measuring and control equipment, grain storage,tension indicators, mechanical or optical, for ropes or cables,torque indicators, mechanical,flow meter test benches,flow control systems for seal cooling and lubricating water,temperature monitoring systems for machinery,temperature and humidity monitoring and logging systems,temperature monitoring systems for kilns,temperature monitoring systems for paint curing,temperature monitoring systems for gas and diesel engines,temperature monitoring systems for refrigerated vehicles,temperature monitoring and alarm systems for food,temperature monitoring instruments, infrared,liquid level indicators, electronic,liquid level indicators, gamma-ray,liquid level indicators, ultrasonic,liquid level indicators, infrared,liquid level indicators, capacitance type,liquid level indicators, diaphragm type,liquid level indicators, fixed electrode type,liquid level indicators, float type,liquid level indicators, weighing type, load cell system,liquid level indicators, displacer system,liquid level indicators, pneumatic purge type,liquid level indicators, dial type,liquid level indicators and measuring equipment, remote,liquid level indicators, recording,liquid level indicators, tubular glass or plastic,level indicators for water,level indicators for fuel and oil,level indicators for liquid ammonia,level indicators for sludge,liquid level indicators for closed vessels and storage tanks,liquid level indicators for open vessels and reservoirs,liquid level indicators for pressure vessels and boiler drums,gauges, measuring, mechanical, for threads,gauges, measuring, mechanical, for holes,gauges, measuring, mechanical, for length and diameter,transducer calibration equipment, mechanical,pressure testing equipment,flow meter test equipment,monitoring systems, pressure,rotation monitors, mechanical,borescopes,shaft position, speed and movement monitors,gauges, pressure, indicating and recording,gauges, pressure, precision,gauges, pressure, electric and electronic,gauges, pressure, illuminated, alarm,gauges, pressure gauge calibrating,manometers, inclined,manometers, single column,manometers, u-tube, two column and two liquid types,manometers, multi-tube,manometers, portable,micro-manometers,gauges, absolute pressure,gauges, positive pressure,gauges, differential pressure,pressure gauge tubes,pressure gauge calibration benches,gauges, ionisation/vacuum ionisation,gauges, compound, pressure and vacuum,pressure gauges, oil well,pressure gauges, precision, for laboratories and the chemical industry,gauge pressure and vacuum alarms,pressure gauge protection devices,pressure gauges for bottled gases,pressure gauges for refrigerating fluids,pressure gauges for polymers,dial gauges,linear speed indicators,water meters,flow meters, steam,flow meters, gas and air,flow meters for cold fluids,flow meters for liquefied gas,flow meters for hot fluids,flow meters for oils and viscous liquids,flow meters for corrosive fluids,flow meters for water,flow meters for liquid fuels,flow meters for powders and bulk solids,flow dividers for liquids,flow control systems, high purity gas,flow meters, cryogenic,flow meters, mass flow,flow meters, microflow, for leaks,flow meters, river measurement,flow meters, effluent,flow meters for small flow rates,flow meters for high temperatures,flow meters for high pressures,flow meters for compressed air,flow meters, food and beverage industry,smart gas meters,water velocity meters,gas meters,meters for gas production plant,meters, volumetric, for petroleum and petrochemical products,compressed air meters,anemometers, hot wire,manostats,gauges, draught,fibrescopes, industrial,auxometers/dynameters,absolute gravity meters,ellipsometers,gauges, thickness,gauges, radius,gauges, wire,gauges, angle,gyroscopes and gyrometers,accelerometers,pressure standards, dead-weight,conveyor belt tension measuring equipment,position measuring systems, machine tool,gas metering correction equipment, temperature, pressure and compression,squares, metal, high precision,squares and bevels, engineers',gauges, precision clearance, for plastics,measuring instruments, optical, size and shape,optical compensators, babinet compensators,gauges, width, optical,comparators, optical,micrometers, optical, contactless, laser,instruments, optical, cavity examination,photoelasticity measuring equipment, optical,meters, communal heating, prepayment card,micrometers, internal,micrometers, external,micrometers, digital display,micrometers, optical,endoscopes, high temperature applications,endoscopes, industrial,calipers and dividers, metalwork,calipers, lens,calipers, electronic,calipers, screw thread,calipers, vernier or sliding,calipers, external, metalwork,calipers, internal, metalwork,calipers and dividers, woodworking,depth gauges,gas pressure adjusting systems, gas production plant,flow control systems, air to fuel ratio,flow control systems, open channel,flow control systems for cutting oil,flow controllers, steel shot or grit,flow controllers for petroleum,flow maintaining devices, hopper content,flow indicators, fire hose,flow recorders for petroleum refineries,filter blockage indicators, oil pipeline,level regulators for petroleum,air flow regulators,feed water regulators, automatic,gas flow regulators,oxygen regulators for oxygen therapy equipment,energy regulators, thermostatic,temperature regulators for petroleum,temperature regulators for engines,temperature regulators for combined heaters and ventilators,temperature regulators for furnaces and burners,temperature regulators for food industry equipment,temperature controllers, cryogenic,temperature controllers, galvanometer type,temperature controllers, electromechanical,temperature controllers, electronic,temperature controllers, microprocessor based,temperature controllers, recording,temperature controllers, multipoint,temperature controllers, programmable,temperature controllers, proportional action,temperature controllers, automatic, thermostatic,temperature controllers, thermocouple,temperature controllers, two-step,temperature controllers, anticipatory,temperature controllers for industrial applications,temperature controllers for the plastics processing industry,pressure regulators for food industry equipment,pressure dampers for pressure gauges,pressure regulators and reducers, air,pressure regulators and reducers, liquids,pressure regulators, diaphragm operated,pressure regulators and reducers, gas,pressure regulators, electronic,pressure regulators, manual,temperature transmitters,liquid level gauging system, radar type,gauges, liquid level,gauges, liquid level, enamelled,liquid level or float switches and level alarms,liquid level contact switches,liquid level transmitters,liquid level controllers, pneumatic,liquid level controllers, mercury switch type,liquid level controllers, capacitive,liquid level controllers, ultrasonic,liquid level controllers, automatic,liquid level controllers, remote,liquid level controllers, cryogenic,liquid level controllers, microwave,liquid level recorders,current meters, hydrometry,thermostats, single pole,thermostats, double pole,thermostats, encased,thermostats, cold junction,thermostats, pneumatic,thermostats, fast acting,thermostats, high temperature,thermostats, low temperature,thermostats, time controlled,thermostats, water temperature,thermostats, motor vehicle,thermostats, air conditioning systems,thermostats, room,thermostats, laboratory,thermostats, domestic electrical appliance,thermostats, industrial,thermostats for refrigerators and refrigeration plant,thermostats for commercial electrical appliances,thermostats for spa pools and saunas,pyrostats,thermostat components and accessories,discs, bimetallic, snap action, for thermostats,discs, bimetallic, slow moving, for thermostats,gauges, vacuum,pressure switches, refrigeration plant.