Tenney SVO Thermal Fluid-Heating Vacuum Oven


  • Convenient design allows for simultaneous depressurization and heating conditioning within one machine
  • Diverse array of vacuum systems can be employed to match your specific process requirements
  • VersaTenn V's latest software developments in environmental test chamber control make programming and diagnostics simple
  • Vacuum chamber designed for efficiency and simplicity in operation
  • Reach precise altitude conditions for optimal test results with various vacuum and vent solenoid valves that are automatically controlled by the main controller


  • Electric heater cables that circumvent the structural shell of oven and oven door
  • Thermostat for overtemperature protection
  • Heat transfer fluid system heated by an electric immersion heater used with O/N 68103
  • Variable capacitance type absolute pressure transducer to measure chamber pressure
  • Multi-configuration vacuum system
  • Single-stage or two-stage oil-seated rotary vane vacuum pump included


  • Standard Pressure Conditions: Site level to 20.88mm Hg (80,000 feet altitude)
  • Optional Pressure Conditions: Site level to 8.28mm Hg (100,000 feet)
    •   Site level to 1.10mm Hg (150,000 feet)
    •   Site level to 0.169mm Hg (200,000 feet)
  • Standard SVO Chambers: 15°C above ambient (approx.) to +150°C
  • For Model 27SVO, O/N 68103:
  • Pressure Range: Site level to 20.88mm Hg (80,000 feet altitude)
  • Temperature Range: 15°C above ambient (approx.) to +150°C (302°F), ± 0.5°C after stabilization
  • Workspace Dimensions of The Tenney SVO Thermal Fluid-Heating Vacuum Oven are: 36"W x 36"L x 36"H

Test Chamber Quality

TPS Thermal Product Solutions is a pioneer in the design and manufacturing of environmental test equipment. The Tenney Brand has been an industry leader since 1932. Our decades of experience, processes and procedures ensure quality and reliability of every test chamber or walk-in room we manufacture. Rest assured that you are purchasing a world-class piece of equipment built to perform and last.


We back our environmental test chambers with a comprehensive service organization. Factory trained, courteous and knowledgeable technicians provide on-site installation, maintenance and repair for your test chamber or room. In-house service technicians and a parts & service department stand ready to assist you. Contact our service department to inquire on preventive maintenance programs, extended warranties, calibrations services and more. For a full list of chamber services click here.


  • VersaTenn V Temperature HMI Controller

    VersaTenn V Temperature HMI Controller

    • Two channel controller
    • Auto/ manual control
    • Pentium class processor
    • 8 MB flash disk on chip storage
    • USB flash disk port
    • RS-232 communications
    • Color LCD touch screen interface with real-time graphic displays
    • Microsoft Windows CE Operating System
    • Logic circuits automatically select cooling and heating modes
    • Near infinite number of programs and steps possible
    • RTD sensors for temperature measurement
    • 2 process inputs, 10 temperature control outputs, 6 event outputs
    • Alarm output for each channel
    • RS232 data communications


  • Tempguard IV Overtemperature Protection

    Tempguard IV Overtemperature Protection

    • protects against product over/under temperature
    • microprocessor based controller that incorporates programmable high and low temperature limits
    • 100 ohm Platinum RTD used for temperature measurement
    • easy to use
  • LinkTenn 32 Controller Software

    LinkTenn 32 Controller Software

    • interactive remote control and monitoring
    • alarm reporting and notification via email or fax
    • user-friendly profile program editor
    • logging, printing and graphing of process data
    • exporting of logging history data via CSV file for easy import into Microsoft Excel or analysis packages
  • Chart Recorder

    Chart Recorder

    • Circular or strip type
    • Records temperature versus time
    • Some models include digital display
    • J thermocouple for temperature measurement

  • GN2 Backfill System

    • Pressures the chamber site level in place of an atmospheric vent system.   
      Pressure relief valve on top of the chamber provides overpressure  protection
  • Molecular Sieve Trap

    • Prevents oil from backstreaming from an oil-filled type vacuum pump into the chamber.
  • Cold Vapor Trap

    • Protects the vacuum pump by preventing condensable gases from entering the vacuum pump oil.
  • Vacuum System

    • An array of systems may be employed:
      Rotary vance, scroll, reciprocating, oil-filled pump, oil-less pump.
  • Cascade Temperature Control Software

    • Permits monitoring of the conditioned air supply temperature and product temperature for dual loop control.
  • Alarm Buzzer & Silence Switch

    • Disables buzzer while corrective action is taken
    • Silence light illuminates
    • Alarms operator to reset silence switch

  • UUT Data Acquisition Module

    • Monitors up to 16 points in the chamber
    • Up to 4 UUT's can be used for a total of 64 thermocouple units
    • Data can be optionally logged and used for analysis, graphing, and reporting


Tenney SVO Thermal Fluid-Heating Vacuum Oven Specifications

(S) Vacuum Only

Vacuum With Heat to +150°C
Interior Dimensions (WxHxD) 24" x 24" x 24" / 61cm x 61cm x 61cm 30" x 30" x 36" / 76cm x 76cm x 91cm 36" x 36" x 36" / 91cm x 91cm x 91cm 48" x 48" x 48" / 122cm x 122cm x 122cm
*Exterior Dimensions (WxHxD)
(S Models Only)
41" x 64" x 44" / 103cm x 163cm x 108cm 52" x 72" x 66" / 118cm x 178cm x 138cm 52" x 76" x 66" / 133cm x 193cm x 138cm 60" x 92" x 72" / 147cm x 228cm x 174cm

* Add 2" (5cm) to (W x H x D) for SVO overall dimensions.

Control of conditions is as indicated on instrumentation furnished with chamber. Minor performance variations with window and accessories. Performance data is based on ambient temperature of +24°C (+75°F) at sea level on 60Hz operation. For 50Hz operation, performance will be reduced. Under certain programming conditions standard rates of change may vary. Consult factory for your specific requirements.


Temperature Range Control Tolerance Heating Rate Ultimate Vacuum Uniformity Vacuum Pump Control Interface Power supply Amps
Approximately +15°C above ambient to +150°C +/-0.3°C Ambient to +100°C in 90 minutes 20mm/hg (20.88 Torr or 80,000') +/-1°C Oil sealed rotary pump with gas ballast and solenoid valves for vacuum and vent RS232 230V 1PH 60Hz (others available) will depend on size and voltage selection