Cool Drawer Dual Sensor

The Cool Drawer Dual Sensor is designed for use in critical processes where it is desirable to have a second crystal in the vacuum chamber. Water cooled, cast stainless steel sensor body, two Cool Drawer crystal holders and a pneumatically actuated shutter provide for a rugged sensor head with the extra reliability of a backup crystal. A cleaner, more reliable vacuum system installation is possible as there are no coaxial cables inside the chamber.


  • Dual crystals
  • Cool Drawer crystal holder
  • No internal cables
  • Crystal shutter
  • Available with: CF40 feedthrough and 2.54 cm (1 inch) bolt feedthrough
  • Bakeable if ordered with welded CF40 flange
  • Adjustable length if ordered with compression fittings
  • Sensor/feedthrough combinations available welded to customer specified lengths


Type Cool Drawer Dual Sensor
Finish Stainless steel, gold plated Cool Drawer™
Cooling water Minimum water flow of 150 to 200 cm³/min using 1/8 in. O.D. tube, 30°C max. (Do not allow to freeze)
Crystal Industry standard 0.550 in. diameter
Air supply 55 to 60 PSI regulated
Electrical connection Two standard female BNCs on atmosphere side
1 in. bolt and compression fitting sealed terminations  
Materials 304 stainless steel, Teflon®, ceramic, beryllium nickel, VITON®
Temperature Operational environment to 300° C with water cooling or 165° C without
Mounting 1.015 in. ±0.010 in. diameter aperture
CF 40 welded terminations  
Materials 304 stainless steel, ceramic, beryllium nickel
Temperature Operational environment to 450° C with water cooling or 200° C without
Mounting Mates with 2 ¾ in. ConFlat® type flanges
CDD Part Number.png


Cool Drawer Dual Sensor
Part Number Description
750-420-G1 Solenoid Valve, 24V (for use with shuttered and multi-crystal sensors)


Name Description
Quartz Monitor Crystals Quartz Monitor Crystals

Spare Parts

Cool Drawer Dual Sensor
Part Number Description
123259 Cool Drawer Sensor Crystal Retainer
123261 Cool Drawer sensor Drawer
123260 Cool Drawer Sensor Drawer and Retainer Combo
147206-2 * Bellows with 35 in. tube
147207 Bellows and cover assembly (Includes all parts marked with *)
147401 Shutter
147402 Link
147403 * Actuator
147406 * Bellows support
147407 * Bellows Cover
147408 * Threaded shaft
147411 Spacer
147424 * Bellows tube
082-026 # 2-56 Nut (part of heat shield assembly)
082-064 * Lockwasher
084-205 * #4-40 x 3/16 Phillips screw
800128 #4 Lockwasher
800371 Shoulder Screw
800372 Washer
800416 * 6-32 x 3/16 in. set screw
803313 * Spring
123223-2 Conduit brazed assembly - short pin
803102 O-ring for 5 port adjustable feedthrough
803261 Washer for 5 port adjustable feedthrough
send to a friend

Related Products