Overview
The Simpson Model 3324 is a classic industrial pyrometer and temperature controller designed for precise temperature monitoring and control in manufacturing, process heating, and industrial furnace applications. This dual set point controller covers a measurement range of 0–1500°F (0–800°C), making it suitable for high-temperature process control where separate alarm or shutdown thresholds are required.
Key Features
- Dual set point configuration for independent high and low temperature control
- Wide measurement range: 0–1500°F / 0–800°C
- Analog needle display for straightforward temperature indication
- Relay output contacts for alarm or control action
- Compact panel-mount design suitable for retrofit installations
- Proven reliability in industrial heating and process control
Technical Specifications
- Temperature Range: 0–1500°F / 0–800°C
- Sensor Input: Thermocouple (type to be verified with application)
- Set Points: Dual adjustable set points
- Output: Relay contacts (SPDT configuration typical)
- Display: Analog needle gauge
- Mounting: Panel mount, round or square bezel (standard industrial panel cutout)
- Power Supply: Verify with datasheet (typically 120VAC or 240VAC)
- Operating Temperature: Standard industrial range (verify with supplier)
Typical Applications
- Furnace and kiln temperature monitoring and control
- Heat treat and annealing process control
- Ovens and curing chambers
- Alarm setpoints for temperature excursions in manufacturing processes
- Retrofit replacement in legacy industrial heating systems
- Process safety shutdown triggers
Compatibility & Replacements
Compatible With
- Standard industrial thermocouple sensors (Type J, K, or as specified for your application)
- Panel-mount installations with standard electrical enclosure cutouts
- 120VAC or 240VAC control circuits (verify power rating before ordering)
- Relay-based control systems and legacy industrial controllers
Replaces / Drop-In Replacement For
- Original equipment pyrometer controllers requiring dual set point functionality
- Legacy Simpson electric pyrometer models with equivalent panel dimensions
- Industrial temperature controllers with identical thermocouple input and relay output specifications
Works With
- Standard thermocouple wiring and connectors
- Industrial relay logic and discrete control systems
- 24 VDC and 120/240VAC control power supplies
- Mechanical time-delay relays and solid-state switching devices
