Features
- 72×72mm panel mount with shallow 60mm depth
- Potentiometer dial for analog setpoint adjustment
- Red 0.5” 3.5-digit LED for process display
- Alarm indicator with ON red LED
- Deviation alarm relay output (2A/240VAC)
- Selectable thermocouple or RTD input
- Supports Type J/K TC and PT100 RTD sensors
- PID or ON/OFF control with jumper selection
- Cold junction compensation for TC input
- Sensor break upscale protection included
- Power supply: 100–240VAC universal input
- Ideal for compact industrial control panels
BTC-704 Compact Analog Temperature Controller
PID or ON/OFF control with LED display & alarm
BTC-704 is a compact 72×72mm analog temperature controller designed for efficient and space-saving control applications. It features a clear 3.5-digit red LED display, analog setpoint dial, and deviation alarm relay output. Users can easily select PID or ON/OFF control modes based on process needs. With universal sensor compatibility and reliable performance, this controller is ideal for panel-integrated industrial temperature control systems.
BTC-704 Panel Display and Control Interface
Red LED display with analog dial and alarm indicator
The BTC-704 panel features a 0.5-inch red 3.5-digit LED display, offering clear real-time visibility of process temperatures. An ON (red) LED alarm indicator alerts users when deviation limits are exceeded. The analog potentiometer dial on the front panel allows for precise and intuitive adjustment of the setpoint. This streamlined design ensures simple operation with minimal training and is ideal for panel-integrated control environments.
Input Compatibility and Accuracy
Supports thermocouple and RTD with stable accuracy
BTC-704 supports Type J and K thermocouples as well as 3-wire PT100 RTD sensors (DIN or JIS standards). The input circuit includes cold junction compensation for TC inputs and delivers ±1% of span accuracy, ensuring reliable and accurate temperature measurement across a wide range of applications.
Output Types and Alarm Function
Relay, SSR voltage and alarm relay outputs available
BTC-704 offers a variety of output formats, including relay contact output (5A/240VAC), SSR voltage drive (32VDC / 20mA), and analog current or voltage output (e.g., 4–20mA or 0–10V). A dedicated deviation alarm relay output (2A/240VAC) is also included, providing real-time feedback for critical temperature limits.
Applications
Specification
Power
Input
Control
Output
Adjustment
Indication
Environmental and Physical Specifications
Approval Standards
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FAQ
BTC-704 supports Type J and K thermocouples and 3-wire PT100 RTD sensors, compatible with both DIN and JIS standards.
Yes. BTC-704 allows users to select between PID and ON/OFF control modes through jumper configuration.
The controller provides relay output, SSR voltage drive, and optional analog output (4–20mA or 0–10V). A deviation alarm relay is also included.
Yes. With its 72×72mm panel size and only 60mm depth, the BTC-704 is ideal for space-limited industrial control cabinets.
Yes. It features a 3.5-digit red LED display for temperature and an ON red LED alarm indicator for deviation alerts.
