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MKS 628B Series Capacitance Manometers

MKS has improved on the industry standard Type 628A by incorporating new features into the Type 628B Baratron^® capacitance manometer.

Temperature regulated to 100° C
Accurate to 0.25% of reading
Includes updated temperature control electronics to provide superior long-term stability and repeatability
Optional heater and temperature status LED/switches indicate that the heater (which maintains the sensor temperature to 100° C) is at temperature
Available from 0.05–1,000 mm Hg (Torr)
Input power is ±15 VDC
Output signal is 0–10 VDC
Replaces the Type 628A and Type 128 absolute capacitance manometer
Inconel^® construction for excellent resistance to corrosive gases

Start Your Configuration

Tips for Capacitance Manometer operation:

Avoid over pressurizing the gauge
Maintain a stable ambient temperature
Avoid vibration
Avoid particulate contamination, or any contamination that may affect diaphragm motion
Recalibrate frequently

Measurement Method	Capacitance Manometer
Accuracy (% of measurement)	0.25% (above 1 Torr) 0.5% (below 1 Torr)
Temperature (operating)	15-50° C
Max. Pressure	45 psia
Materials Exposed to Vacuum	Inconel
Analog Outputs	0-10 VDC
Internal Volume	6.3 cc
Input Power	±15 VDC ±5% @ 0.5A max.
Temperature Coeff. (zero)	0.002%(1-1,000 Torr FS) 0.01% (0.1 Torr) and 0.25 Torr 0.02% (0.05 Torr)
Temperature Coeff. (span)	0.02% of reading/° C
Full-Scale Pressure	0.05, 0.1, 0.25, 1, 2, 10, 20, 100, & 1,000 Torr
Resolution	0.001% of F.S. (0.1 Torr or greater) 0.002% of F.S. ( for < 0.10 Torr)

1. Unit:
* 2. Full Scale Range:
3. Fittings:
4. Accuracy:
5. Readout Options:
6. Connector:
* The Full Scale Range value is the maximum pressure for which the particular capacitance manometer has been calibrated. The sensor will measure from this pressure to four decades below this pressure. Example: A capacitance manometer with a Full Scale Range of 10 Torr will accurately display pressures from 10 Torr to 0.001 Torr.
Part Number:

For more in depth information please reference our Technical Notes on gauging, read our Lesker Tech back issues concerning gauging, or email us at Gauging@Lesker.com.

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