Series 275

Convectron® vacuum gauges

Convectron? gauges from MKS h***e been the world-standard convection-enhanced Pirani

gauge for over 35 years and are used in thousands of vacuum processes to accurately

measure pressure from atmosphere to 10-4 Torr. To assure the highest level of accuracy

and gauge-to-gauge reproducibility, every Convectron gauge is individually calibrated at the

factory, thereby making controller adjustment unnecessary.

Convectron gauges are a unique variation of thermal conductivity gauges where pressure

measurement is based on the rate of heat loss from a sensor wire. Unlike traditional

thermocouple and Pirani gauges that use only conductive heat loss, Convectron gauges

take advantage of heat loss due to convection at higher pressures. This extends the range

of accurate, repeatable measurement to atmosphere.

The Convectron gauge delivers fast resp***e time — in milliseconds — compared to

thermocouple-type gauges that respond in seconds.

Features & Benefits

• Wide range vacuum pressure

measurement from atmosphere

to 1x10-4 Torr

• Individually calibrated gauges assure the

highest measurement performance

• Easy installation in space-restricted

locati***

• Wide selection of vacuum fittings

simplifies installation on your vacuum

system

• For use with several MKS vacuum gauge

controllers

• Temperature compensation offsets the

effects of ambient temperature changes

• Rugged c***truction

 

Measuring Range for N2 or air (See Notes 1 and 2 below)

Torr Atmosphere to 1x10-4

mbar Atmosphere to 1.33x10-4

Pa Atmosphere to 1.33x10-2

Mounting Position Horizontal preferred

Weight 85 grams (3 ounces) for 1/8 NPT flange

Internal Volume 35 cm3 (2.14 in3)

Sensor Materials Gold-plated tungsten

Other Materials Exposed to Gas 304 stainless steel, borosilicate glass, Kovar?, Alumina, NiFe alloy, polyimide

Gauge Operating Temperature 4°C to 50°C

Gauge Bakeout Temperature 150°C

Maximum Internal Pressure 150 psi

 

Ordering Information

Convectron Gauges with Gold-plated Tungsten Sensor* Catalog #

1/8 NPT / 1/2 inch tubulation 275071

1/4 inch VCR? type female fitting 275185

1/2 inch VCR type female fitting 275282

3/8 inch VCO? type male fitting 275233

1.33 inch rotatable Conflat? type fitting 275256

2.75 inch rotatable Conflat type fitting 275238

NW16KF flange (welded) 275203

NW25KF flange (welded) 275196

NW40KF flange (welded) 275316