Tenney Benchmaster Test Chamber

Tenney's Benchmaster temperature and humidity test chambers are capable of simulating a wide range of temperature or temperature and humidity conditions. The five-cubic foot workspace will readily accept equipment as large as a 19" relay rack. 

In keeping with the needs of today's lab, we designed these temperature and humidity test chambers to have a compact exterior that maximizes the interior workspace. 

Benefits of the Tenney Benchmaster Test Chamber

  • Simulates a wide range of temperature or combined temperature and humidity conditions to meet a variety of testing needs
  • Compact design maximizes interior laboratory workspace
  • Vertical-down airflow assures consistent conditions

Equipment Types

  • Temperature Only
  • Temperature & Humidity
  • Cascade Refrigeration System


  • Vapor-tight interior liners of 100% continuously welded stainless steel
  • Humidity capable models constructed of 100% non-corroding parts and have a low-water protection system
  • Open-air low mass nichrome wire heating elements
  • Cascade refrigeration system with hermetic compressor
  • 100 Ohm Platinum RTD sensor for temperature measurement
  • Vapor-Flo I Humidity Generator (in humidity models)
  • In humidity models-dry capacitance type humidity sensor
  • Chamber drain connection
  • Propeller fan for airflow


  • Temperature alarm and shutdown circuit for additional protection against chamber and product over/under temperature
  • Reverse osmosis water purification system
  • Water demineralizer
  • Water reservoir for humidity system (5 gallon)
  • Recirculating system for humidity water
  • Viewing window, thermally insulated and heated
  • Interior light
  • Shelving, adjustable and removable
  • Automatic CO2 or LN2 cooling boost system
  • Automating boost heating system
  • GN2 purge system
  • Recording instruments
  • Chamber cart with casters for benchtop models


  • Temperature Range: -70°C to  +200°C
  • In humidity models-Humidity Capability: 20% to 98% RH in the dry bulb range of +20°C to +85°C,limited by a 3 dewpoint

Battery Test Options


Psychrometric Chart


Standard Range Humidity


Learn About Reverse Osmosis Options


  • Watlow F4 Temperature Controller

    Watlow F4 Temperature Controller

    • Dual channel
    • Profiling: 40 profiles, 256 steps
    • Automatic & manual control
    • 2 Analog inputs, universal-type (RTD is standard)
    • 4 Digital inputs
    • 2 Auxiliary analog inputs -- optional
    • 2 Control outputs: time proportioned, on/off or 4-20 mA
    • 2 Alarm outputs
    • 8 Digital event outputs
    • 2 Retransmit outputs -- optional
    • Communications: EIA-232 and EIA-485 with Modbus RTU protocol


  • Chart Recorder

    Chart Recorder

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

  • Dry Air Purge System

    Dry Air Purge System

    • removes unwanted moisture and process vapors from chamber
    • a chamber valve prevents chamber from becoming pressurized
    • self regenerating twin tower heatless dessicant type dryer
    • activated by an event output from main controller

  • 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
  • GN2 Purge System

    GN2 Purge System

    • provides and inert atmosphere inside the chamber
    • minimizes moisture buildup
    • prevents condensation
    • prevents corrosion by eliminating oxygen in the chamber
  • Ion Cartridge Exchanger

    Ion Cartridge Exchanger

    • For use when resistivity of water supply is less than 50,00 ohms/cm.
    • Prevents encrustation of the generator's immersion heater, housing, float assembly, ultimatley causing failure.
  • Alarm Buzzer & Silence Switch

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

  • LN2 Boost Cooling System

    • Increases the rate or limit of cooling beyond refrigeration means.
    • Manual set flow adjustment valve
  • CO2 Boost Cooling System

    • Increases the rate of cooling beyond refrigeration means.
    • Non-adjustable, carbon dioxide injecting port
  • Shunt Trip Pole- Circuit Breaker ICB

    • Protects conditioning control circuitry boost heating
  • Explosion Resistant Interior/ Exterior for Hazardous Area

    • May be designed to meet NFPA 497 and National Electric Code, Article 500 standards


Tenney Benchmaster Test Chamber Specifications

Overall dimensions in inches/centimeters

Benchmaster Version Upright Version
Workspace Width 20/51
Depth 19.25/49
Height 22/56
Exterior Width 66.25/168.25 37/9
Depth 32/81.28 32/81.28
Height 40.5/102.87 73.5/186.69
Temperature Range
Low C -70
High C +200
Humidity Capability 20% to 95% RH in the dry bulb range of +20C to +85C as limited by a 3 dewpoint.
Utilities, etc.
Refrigeration (2) 1 HP
Heater Capacity 2 KW
Humidifier Watts
AMPS @ 230V, 1Ph
29 29 29 29
AMPS, Fuse 40
Unit Weight LBS 500