United States Contact Find a distributor Login Go Products Downloads Search results Products Air Conditioning / Refrigeration Digital Manifolds Absolute Pressure Instruments Differential Pressure Instruments Pressure / Gas Leak Detector Vacuum Measuring Instruments Leak Detectors for Common Refrigerants High pressure gauge Digital barometer Combustion / Flue Gas / Emissions Combustion / Flue Gas Analyzers Industrial emission measurements Combustion / Particle Analyzers Combustion / Leak Detectors Combustion / Smoke Testers Nanoparticles Electrical Measurement Multimeters Voltage Testers Current / Voltage Meters Non-contact voltage tester Air Flow Vane anemometers Thermal anemometers Volume flow hood Data Loggers and Monitoring Wi-Fi Data Logger Systems Data Monitoring Systems USB Datalogger Temperature data loggers Humidity data loggers Pressure data loggers CO₂ data logger UV data loggers Shock data logger Smart Probes Temperature measurement Infrared measuring instruments Surface Thermometers Air Temperature Measuring Instruments Immersion / Penetration Thermometers Immersion thermometers Temperature probes Temperature measuring strips Humidity measurement Thermohygrometers Material Moisture Meters Data Loggers and Monitoring CO₂, CO, Lght, Sound, rpm CO / CO₂ Measuring Instruments CO measuring instruments Light Measuring Instruments Sound Level Meters Tachometers and Stroboscopes Comfort Level Meters Cooking Oil and pH Cooking Oil Testers pH Measuring Instruments Transmitters Temperature transmitter Humidity transmitter Pressure transmitter Differential pressure transmitter Compressed air meter Smart Probes Applications Heating, Ventilation, Air Conditioning, Refrigeration Heating Technology Refrigeration Technology Ventilation Indoor Air Quality Electrical Equipment Building Maintenance Facility Management Emissions Measurement Emissions Nanoparticles: Measurement, Dilution, Soot Generation Indoor Air Quality Food Safety Food Production Restaurants Supermarkets Transport Storage Bakers and Butchers Retail Chain Pharma and Health Pharmaceutical Industry Hospitals Pharmacies Transport Museums and Archives Other Industries Production Maintenance Research and Development Energy Production Emissions Analyzers Cleanroom Solutions testo Saveris Restaurant testo Saveris Retail Chain testo Saveris Pharma Services Customer Support Repair Services Knowledge Base Measuring Parameters Correctly Thermography: Practical Knowledge Customized Probes Measuring Range Accuracy Probe Shaft Length Connection Cables Downloads Industrial Calibrations Calibration Service Calibration Equipment Product Registration Company About Testo Careers Current Opportunities Working at Testo Benefits Training Programs Equal Opportunity Employer Resources Testo Worldwide Newsletter Warranty User Stories Highlights Fall Promotion! Purchase a testo 320 or 330 Combustion Analyzer and get a Video Borescope FREE! Special Offer! Purchase a testo AC / Refrigeration Smart Probes Kit and get a testo 410i Vane Anemometer Smart Probe FREE! Intuitive air velocity and IAQ. The new testo 440 air velocity and IAQ meter, now available! Increase Quality. Lower Cost. Testo Saveris Restaurant Every drop is precious. Guarantee cooking oil quality and save costs. Digital, not Analog Testo: One line for all AC / refrigeration systems. HVAC/R Food Safety Pharma and Health Museums and Archives Portable Emissions Analyzers Indoor Air Quality Other Industries Services Emission measurement CO₂, CO, light, sound, rpm Data loggers Electrical measurement Humidity measurement Cooking oil and pH Pressure measurement Flow measurement Temperature measurement Thermal imagers Transmitters Smart Probes HVAC/R Food Safety Pharma and Health Further Industries Customer Support Calibrations Repair Services Knowledge Base Customized Probes Product Registration About Testo Careers Press Resources and Links Contact Testo North America 2 West Market Street, Suite 500 West Chester, PA 19382 United States 800-227-0729 info@testo.com © 2018 Testo SE & Co. KGaA Terms and conditions TOP