Description
The Schneider Electric (Barber Colman) TK-4012 is a pneumatic bulb thermostat engineered for reliable heating control in commercial and industrial HVAC applications. Designed with a direct-acting control action that is field changeable, this thermostat offers installation flexibility and ease of commissioning without requiring a replacement unit when system configurations change.
The TK-4012 features a 3/32″ x 54″ averaging bulb that accurately senses temperature across a wide area, making it well-suited for duct averaging, hydronic piping, or large-space sensing applications. The dial is clearly marked Cooler-Warmer for intuitive setpoint adjustment, with a control range of 30–90°F to accommodate a broad spectrum of heating system requirements.
Key Features
- Direct acting control action — field changeable for installation flexibility
- Heating application thermostat
- Safe bulb temperature rating: 230°F
- Averaging bulb size: 3/32″ diameter x 54″ length
- Dial marked: Cooler-Warmer
- Temperature control range: 30–90°F
- Adjustable throttling range: 5–25°F
- Pneumatic control signal output
Specifications
- SKU: TK-4012
- Brand: Schneider Electric (Barber Colman)
- Control Type: Pneumatic
- Action: Direct Acting (Field Changeable)
- Safe Bulb Temperature: 230°F
- Bulb Dimensions: 3/32″ x 54″ (Averaging)
- Set Point Range: 30–90°F
- Throttling Range: 5–25°F (Adjustable)
- Application: Heating
Applications
- Commercial HVAC pneumatic control systems
- Duct temperature averaging
- Hydronic heating systems
- Industrial heating control loops
- Building automation pneumatic networks
