TSI Alnor DP-Calc 5815 and 5825 Micromanometers
Starting at $570.00
Starting at $513.00

TSI Alnor

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  • Static/Differential Pressure
    • Range: -15 to +15 in. H2O
    • Accuracy: ±1% of reading ±0.005 in. H2O
    • Resolution: 0.001 in. H2O
  • Velocity (Pitot Tube)
    • Range: 250 to 15,500 ft/min (1.27 to 78.7 m/s)
    • Accuracy: ±1.5% at 2,000 ft/min (10.16 m/s)
    • Resolution: 1 ft/min (0.1 m/s)
  • Duct Size (5825): 1 to 250 inches in increments of 0.1 in.
  • Data Storage (5825): 12,700+ samples and 100 test IDs
  • Logging Interval (5825): 1 second to 1 hour
  • NIST Certificate Included
  • Time Constant: User-selectable

The TSI Alnor DP-Calc 5815 and 5825 micromanometers are robust instruments that allow users to easily make HVAC pressure measurements and, when used with pitot tube probes, to measure duct velocity. The DP-Calc 5815 is a simple to operate, handheld digital micromanometer for fast, accurate differential and static pressure measurements. The high performance DP-Calc 5825 can also calculate flow and has data logging capabilities.

Typically used in HVAC commissioning and troubleshooting, the TSI Alnor DP-Calc micromanometers can measure differential and static pressure from -15 to +15 in. H2O (-3735 to +3735 Pa) and calculate and display velocity when using a pitot tube. Additionally, the TSI Alnor DP-Calc 5825 calculates flow, has a variable time constant, and features data logging of 12,700+ samples (100 test IDs) with time and date stamp.

The TSI Alnor DP-Calc micromanometers ship complete with hard carrying case, 4 alkaline batteries, operation and service manual and calibration certificate. The TSI Alnor DP-Calc 5825 also includes an 8-foot (2.4 m) rubber tube, static pressure tip, LogDat2 downloading software and USB cable.


TSI Alnor Pitot Probes
Various length Pitot probes designed for use with TSI Alnor instruments

Power Supplies

TSI Alnor Universal Power Supply
Universal AC adapter designed for use with TSI Alnor instruments


Carrying cases, spare cases

TSI Alnor DP-Calc Carrying Cases
Carrying cases designed for use with the TSI DP-Calc micromanometers


Please consider these optional accessories.

TSI Alnor Norprene Tubing
The TSI Alnor 372000000 Norprene tubing comes in an 8-foot (2.5 meter) length


This product can be used in the following applications: