Dwyer Instruments 25123 Temperature Controller
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Dwyer Instruments 25123 temperature controller with thermocouple or RTD input, relay output, alarm function, and ±0.25% span accuracy.
Product details
| Model | 25123 |
| Manufacturer | Dwyer Instruments |
| Category | Process Instruments |
| Availability | Made to order |
Description
Overview
The Dwyer Instruments 25123 is a rugged microprocessor-based temperature controller suitable for general industrial process control. It accepts input from thermocouples or resistance temperature detectors (RTDs) and provides control output via a relay (SPDT) rated for 10 A @ 240 VAC. With ±0.25% of span accuracy and configurable control action, the 25123 is ideal for heating and cooling applications requiring relay switching in industrial equipment and process systems.
Key Features
- Accepts Thermocouple (3 MΩ minimum impedance) or RTD (200 µA maximum) input
- Relay output: SPDT, 10 A @ 240 VAC resistive rated
- Dual 4-digit LED display (0.56" height) showing temperature and setpoint
- Selectable resolution: 1°F or 0.1°F increments
- High accuracy: ±0.25% of span, ±1°F
- Alarm function for temperature limit protection
- Selectable control action for reverse (heating) or direct (cooling) operation
- Adjustable ramp time from 0 to 100 hours
- Supply voltage: 100-240 VAC or 132-240 VDC ±10%
- Low power consumption: 5 VA maximum
- Relay isolation: 1500 VAC for safe switching
- Non-volatile memory requires no batteries for data retention
- NEMA 4X (IP65) front panel rating for harsh environments
Applications
- Industrial relay-based temperature control systems
- HVAC and heating system control
- Process equipment temperature management
- Furnace and oven control applications
- Industrial alarm and shutdown systems
Specifications
| Input Type | Thermocouple or RTD |
| Output Type | Relay (SPDT) |
| Accuracy | ±0.25% of span, ±1°F |
| Display | Two 4-digit LED, 0.56" height |
| Resolution | 1°F or 0.1°F selectable |
| Input Impedance (Thermocouple) | 3 MΩ minimum |
| Input Impedance (RTD) | 200 µA maximum |
| Supply Voltage | 100-240 VAC or 132-240 VDC ±10% |
| Power Consumption | 5 VA maximum |
| Operating Temperature | -10 to 55°C (14 to 131°F) |
| Output Rating (Relay) | SPDT, 10 A @ 240 VAC resistive |
| Control Action | Selectable reverse (heating) or direct (cooling) |
| Ramp Time | 0-100 hours adjustable |
| Memory | Non-volatile, no batteries required |
| Front Panel Rating | NEMA 4X (IP65) |
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Dwyer Instruments 25123 Temperature Controller
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