• CO2; CO; temperature; humidity; air velocity; MIN/MAX/AVG; backlight; alarms; datalogging with software/USB
  • Optimize HVAC ventilation settings for ASHRAE 62 recommendations
  • Includes Air Velocity Probe



The Fluke 975 offers an unparalleled feature set for HVAC and facilities technicians, helping them work more quickly and accurately, with the ease of use and durability customers expect from a Fluke meter.

  • Simultaneously measures, logs, and displays temperature, humidity, CO 2 , and CO on a bright, backlit LCD display
  • One-touch air flow and velocity with available probe*
  • Wet bulb and dew point temperature
  • % of outside air calculation
  • CO 2 and CO field calibration feature
  • Self-test function at startup
  • Auto-backlight
  • Automatically compensates for barometric pressure changes
  • Min/Max/Average on all measured and calculated readings
  • Multi-language user interface
  • Metric or standard units
  • Audible and visual threshold alarms
  • Extensive discrete or continuous data logging capacity, downloadable to PC via USB interface
  • Keypad lock for security
  • Included Fluke View Forms® software
Measured Specifications
Temperature Range -20°C to 50°C (-5°F to 122°F)
Display resolution 0.1°C (0.1°F)
Accuracy ±0.9°C / ±1.62°F from 40°C to 60°C
±0.5°C / ±1.00°F from 5°C to 40°C
±1.1°C / ±1.98°F from -20°C to 5°C
Relative humidity Range 10% to 90% RH, non-condensing
Display Resolution 1%
Accuracy ±2% RH (10% RH to 90% RH)
Air velocity Range 50.0 fpm to 3000 fpm
0.25 m/sec to 15 m/sec
Display Resolution 1 fpm (0.005 m/sec)
Accuracy ±4% or 4 fpm1
±4% or 0.02 m/sec1 whichever is greater
1. Accuracy specification only valid for velocity readings above 50 fpm.
C0 Range 0 to 500 ppm
Display Resolution 1 ppm
Accuracy ±5% or ±3 ppm, whichever is greater, @ 20°C and 50% RH
C02 Range 0 to 5000 ppm
Display Resolution 1 ppm
Accuracy Warm up time 1 min (5 minutes for full specification) 2.75% + 75 ppm
Calculated Specifications
Dew point temperature Range -44°C to 50°C, (-47°F to 122°F)
Display Resolution 0.1°C (0.1°F)
Accuracy ±1°C when temp: -20°C to 50°C RH: 40% to 90%
±2°C when temp: -20°C to 50°C RH: 20% to 40%
±4°C when RH: 10% to 20%
Wet bulb temperature Range -16°C to 50°C, (3°F to 122°F)
Display Resolution 0.1°C, (0.1°F)
Accuracy ±1.2°C when RH: 20% to 90% temp: -20°C to 60°C
±2.1°C when RH: 10% to 20%
Volume flow rate (in a duct) Range 0 to 3,965 M3/m, (0 to 140,000 cfm)
Display Resolution 0.001 M3/min, (1 cfm)
Accuracy N/A: The volume flow calculation will be a simple average of the data points times the duct area
% outside air (based on temperature) Range 0 to 100%
Display Resolution 0.1
% outside air (based on CO2) Range 0 to 100%
Display Resolution 0.1% N/A
General Specifications
Operating and storage temperature -20°C to 50°C (-4°F to 122°F)
Humidity 10% to 90% (non-condensing)
Altitude Up to 2000 m (6562 ft)
Shock and vibration MIL-PRF-28800F: Class 2
Multi-language interface English, French, Spanish, Portuguese and German
Battery Rechargeable Li-Ion (primary), three-AA (backup)
Data logging 25,000 records (continuous), 99 records (discrete)
Manufacturer Warranty Two-years


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