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    DP-Calc MicromanometersDP-Calc Micromanometers

DP-Calc Micromanometers

  • TSI - 5815 & 5825

To make HVAC pressure measurements


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The DP-CALC 5815 and 5825 micromanometers allow you to easily make HVAC pressure measurements. These robust instruments can be used with Pitot probes to measure duct velocity.

The DP-CALC 5815 is a simple to operate, hand held digital Micromanometer for fast, accurate differential and static pressure measurements. The high performance DP-CALC 5825 can calculate flow and has data logging capabilities.


Model 5825

Features and Benefits

  • Measure differential and static pressure from -15 to +15 in. H2O (-3735 to +3735 Pa)
  • Calculate and display velocity when using a Pitot tube
  • Variable time constant
  • Statistics

Added Features Model 5825

  • Calculates flow
  • Data logging with time and date stamp
  • Stores 12,700+ samples and 100 test IDs
  • Includes LogDat2™ downloading software
  • Programmable K factors


Applications

  • HVAC commissioning and troubleshooting
  • Testing and balancing
  • Pitot tube duct traverses
  • Static pressure measurements
  • Pressure drop across filters, coils, fans, and diffusers
  • Environmental air flow testing

Specifications - DP-CALC Models 5815 and 5825

Static/Differential Pressure
Range1-15 to +15 in. H2O ( -28.0 to +28.0 mm Hg,
-3735 to +3735 Pa)
Accuracy±0.005 in. H2O (±0.01 mm Hg, ±1% of
reading ±1 Pa)
Resolution0.001 in. H2O (1 Pa, 0.01 mm Hg)
Velocity (Pitot Tube)
Range2250 to 15,500 ft/min (.27 to 78.7 m/s)
Accuracy3±1.5% at 2,000 ft/min (10.16 m/s)
Resolution1 ft/min (0.1 m/s)
Duct Size (5825)
1 to 250 inches in increments of 0.1 in. 
(1 to 635 cm in increments of 0.1 cm) 
Volumetric Flow Rate (5825)
RangeActual range is a function of velocity, pressure,
duct size, and K factor
Instrument Temperature Range 
Operating32 to 158°F (0 to 70°C)
Storage-40 to 185°F (-40 to 85°C)
Data Storage Capabilities
Range12,700+ samples and 100 test IDs
Logging Interval 
1 second to 1 hour
External Meter Dimensions
3.3 in. x 7.0 in. x 1.8 in. (8.4 cm x 17.8 cm x 4.4 cm)
Meter Weight with Batteries
0.6 lbs. (0.27 kg)
Power Requirements
Four AA-size batteries or optional AC adapter
 58155825
Differential and static pressure••
Velocity with pitot tube••
Calibration Certificate••
Sample statistics •
Volumetric flow rate •
Actual and standard velocity •
Variable time constant •
LogDat2 data logging software •
K factor •