SZ-7531T Temperature Controller | Dual Set Point with Drain Valve & HGSV Control

Product Summary

The SZ-7531T Temperature Controller is a specialized dual set point controller for air dryers, integrating fan protection, HGSV management, and drain valve control in one unit. With touch-sensitive keypad, multiple inputs/outputs, and programmable drain cycles, it ensures precise and reliable dryer performance.

Key Features

• Dual set point controller for air dryers

• Drain valve + hot gas solenoid valve (HGSV) outputs

• 2 × NTC probe inputs for accurate monitoring

• Temperature range: –45°C to +99°C / –45°C to +100°C

• Resolution: 0.1°C / 0.5°C / 1°C (settable)

• Fan ON/OFF time delay for protection

• Auto/Manual drain valve operation

• Programmable drain ON time (minutes & seconds) and OFF time (hours & minutes)

• Digital inputs for fan, HGSV, and drain valve fault detection

• Prokey support for quick parameter upload/download

• Touch keypad for user-friendly operation

• Auto operation during sensor failure

• Password protection for parameter settings

• High & low temperature logs

• Compact panel mount housing: 78 × 36 × 80 mm

Applications

• Industrial air dryers

• Refrigeration-based air drying systems

• Compressed air treatment plants

• Dehumidifier units with drain & HGSV

Product Benefits

• Reliable control → dual set points ensure precise temperature regulation

• Comprehensive safety → fan delay, fault detection, and error recovery

• Programmable drain valve → customizable ON/OFF cycles for efficiency

• Energy savings → optimized fan and HGSV management reduces power usage

• User-friendly → touch keypad, Prokey support, and clear LED display

FAQs

Q1. What makes SZ-7531T suitable for air dryers?
It provides dual set point control, HGSV output, and drain valve management, all essential for air dryer performance.

Q2. Can the drain valve be programmed?
Yes, both ON time (minutes & seconds) and OFF time (hours & minutes) can be set.

Q3. Does it protect the fan?
Yes, it has a settable ON/OFF delay for fan protection.

Q4. Does it support parameter backup?
Yes, via Prokey upload/download for quick setup.