• Accuracy: ±1.5% of Full Scale
  • Mass Flow Based Measurement
  • Temperature/Pressure Change Insensitive
  • Meter Ranges From 0-10 SCCM to 0-500 SLM
  • Nylon, Aluminum or Stainless Steel Construction
  • Maximum Meter Pressures to 1000 PSIG (SS)
  • Exceptional Versatility
  • Remote Display Capability
  • Analog Output Standard


MAS Mass Flowmeter measures gas flow rates in ranges from 0-10 sccm to 0-500 slm. Accuracy is ± 1.5% of full scale over a wide temperature and pressure range. Response time is two seconds to within 2% of final flow. The MAS offers outstanding performance and unsurpassed value.

In contrast to volumetric flow metering devices, the MAS needs no pressure or temperature correction. This makes the unit ideal for a wide variety of gas flow applications including general process control, flow into vacuum systems, leak testing, and flow calibration.

The MAS is available in nylon, aluminum or stainless steel, with or without a digital display. If the display is selected, KOBOLD provides a 31/2" digit LCD, tiltable over 180° for easy viewing. The remote display option comes standard with 5 feet of cable, but may be ordered with up to 100 feet of cable for remote surface mounting.



Accuracy: ± 1.5% full scale @ 15-25° C and 5-60 PSIA
Repeatability: ± 0.5% full scale
Drift Coefficients Temperature: 0.15% FS/°C
Pressure: 0.02% FS/PSI
Max. Temperature: 50° C
Max. Pressure
Nylon, Aluminum: 100 PSIG
SS: 500 PSIG
Wetted Parts
Nylon: Nylon®, 316 SS, Viton®
Aluminum: Aluminum, Viton®
SS: 316 SS, Viton®
Leak Integrity
Nylon, Aluminum: 1x10-4 scc/sec Helium
SS: 1x10-7 scc/sec Helium
Input Power
Standard: 12 VDC, 100 mA
Option "-V2": 24 VDC, 100 mA
Standard: 0-5 VDC (linear)
Option "-A": 4-20 mA (linear)



MAS - Thermal Mass Flowmeters