Description
The Schneider Electric (Barber Colman) TK-8124 is a professional-grade pneumatic bulb thermostat engineered for precise proportional temperature control in commercial and industrial HVAC applications. Featuring a reverse-acting control response, this thermostat is ideal for systems requiring an increase in output signal as temperature falls — commonly used in heating applications and two-pipe pneumatic control systems.
The TK-8124 uses an averaging bulb sensor to capture a representative temperature reading across a broad surface or fluid medium, making it well-suited for duct averaging, pipe sensing, and hydronic system monitoring. Its 1/8″ NPT air connections ensure straightforward integration into standard pneumatic control piping.
Key Features
- Proportional two-pipe pneumatic control for accurate, stable temperature regulation
- Reverse-acting operation — output signal increases as temperature decreases
- Wide dial range: -20°F to 240°F for versatile application coverage
- Averaging bulb sensor: 3/32″ diameter x 8′ length for broad-area temperature sensing
- 1/8″ NPT air connections for easy pneumatic system integration
- Designed for commercial and industrial HVAC pneumatic control systems
- Barber Colman heritage — trusted legacy brand now under Schneider Electric
Specifications
- SKU: TK-8124
- Brand: Schneider Electric (Barber Colman)
- Control Type: Proportional, Two Pipe, Pneumatic
- Action: Reverse Acting
- Dial Range: -20°F to 240°F
- Bulb Type: Averaging
- Bulb Dimensions: 3/32″ diameter x 8′ length
- Air Connection Size: 1/8″ NPT
Typical Applications
- Commercial building pneumatic HVAC control systems
- Duct air temperature averaging
- Hydronic heating pipe temperature sensing
- Two-pipe pneumatic heating and cooling systems
- Industrial process temperature control
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