... spot ratioApplications for the Raytek Raynger ST20 Infrared ThermometerAutomotive & dieselFacility maintenanceFire safetyMarine maintenanceElectricalIndustrialAsphalt workHVAC systems Main FeaturesInfrared thermometers measure temperature from ... , food service, fire fighting, hobby, and home use"Laser Thermometers" makes reference to the laser that helps aim the thermometerSpecificationsTemperature ...