Air Monitor’s high-accuracy differential pressure transmitters and flow stations will help optimize the performance of your commercial HVAC system. Air Monitor transmitters are equipped with an auto-zero feature that will eliminate the zero-drift that occurs in transducers over time. With accuracies that range from 0.5% to 0.1%, Air Monitor transmitters are suitable for all applications, from commercial HVAC systems to high-accuracy laboratory systems. Complete your airflow measurement station by pairing our differential pressure transmitters with our industry-leading pitot tube technologies. Air Monitor pitot tube stations have the shortest straight run requirements in the industry and use the Feicheimer method to measure true static pressure. Our VOLU-probe stations have AMCA-certified accuracy. Air Monitor differential pressure transmitters, combined with VOLU-probe and FAN-E flow stations, achieve the highest accuracy measurement in supply ducts, return ducts, fan inlets, VAV boxes, and dampers. Select a product below for more information.
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VELTRON DPT 2500-plus Transmitter
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MASS-tron II
Multivariable Transmitter
Measures differential pressure, absolute pressure, and process temperature providing output of calculated mass flow.
Flow, Temperature, ABS Pressure
- Accuracy: 0.1%
- URL down to 0.05” w.c.
- NEMA 1, optional NEMA 4 and 4X
- 24VAC, 24VDC
- Turndown: 100:1
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MASS-tron II/CEM
Continuous Emissions Monitoring (CEM)
System of mass flow products compliant to meet 40 CFR Part 75 data reporting requirements.
Flow, Temperature, ABS Pressure, Reporting
- Add to flow measurement pairing
- Companion mass flow transmitter
- Flow/Differential Pressure Calculator
- 40CFR75 Compliant
- Fully compensated mass flow
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VELTRON DPT-Plus
Multivariable Transmitter
Measures differential pressure and process temperature providing output of calculated mass flow.
Flow, Temperature, or Differential Pressure
- Accuracy: 0.1%
- URL down to 0.05” w.c.
- NEMA 4X
- Class I Div 1, Class II Div 1
- 24VAC, 24VDC
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VELTRON II
Transmitter
Measures differential pressure providing output of differential pressure or volumetric flow.
Flow or Differential Pressure
- Accuracy: 0.1%
- URL down to 0.05” w.c.
- NEMA 1, optional NEMA 4 and 4X
- 24VAC, 24VDC
- Turndown: 100:1

