The Julabo-Presto FPW90-SP is an ultra-low refrigerated-heating circulator engineered for precise thermal management across extreme temperature ranges. This dual-capacity system delivers rapid, stable temperature control from −90 °C to +100 °C with ±0.05 °C stability, supported by a water-cooled compressor, adjustable centrifugal pump, and large internal volume for demanding laboratory and industrial applications.
## Technical Specifications
**Temperature Control**
• Working range: −90 °C to +100 °C
• Stability: ±0.05 °C
• Resolution: 0.01 °C
• Heating capacity: 3 kW
• Cooling capacity (medium ethanol): 1.8 kW at +20 °C, 1.7 kW at 0 °C, 1.6 kW at −20 °C, 1.2 kW at −40 °C
**Refrigeration & Compressor**
• Refrigerant: R404A/R23
• Compressor cooling: Water-cooled
• Cooling water connection: G 3/4″ male with barbed fittings for 1/2″ inner diameter tubing
**Pump System**
• Type: Adjustable centrifugal pressure/suction pump with smart viscosity compensation
• Pressure flow rate: 22–26 L/min
• Pressure head: 5.8–10.2 psi
• Suction flow rate: 11–16 L/min
• Suction head: 2.9–5.8 psi
• Connections: M16×1 male with 8 mm and 12 mm hose barbs
**Control & Display**
• Programmer: 6 × 60 program steps
• Display options: VFD, LCD, or VFD COMFORT-DISPLAY and LCD DIALOG-DISPLAY
• External sensor: Pt100 connection
• Communication: Serial RS232/RS485 switchable
• Alarm output for external control and solenoid valve operation
**Electrical**
• Voltage: 230 V/3-phase/60 Hz (additional regional configurations available)
• Energy saving: Proportional cooling capacity control
**Environmental**
• Ambient operating range: 5 °C to 40 °C
• Relative humidity: 50% at 40 °C
• Bath fluid: Requires non-acid, non-corroding materials; unsuitable for food, pharmaceutical, or medical product contact
## Key Features
• Large internal volume enables rapid temperature transitions and stable thermal conditions
• Smart pump function automatically adjusts flow rate for fluid viscosity changes
• Improved insulation minimizes ice formation in ultra-low temperature applications
• Visual liquid level display and easily removable venting grill for maintenance
• 3 analog electronic module connections for alarm, standby, recorder, and programmer inputs
## Typical Applications
Liquid heating and cooling in bath tanks; external temperature control in closed-loop circuits; materials testing; viscosity studies; chemical process temperature management.
## Compatibility & Integration
RS232/RS485 communication enables integration with laboratory information systems and external control equipment. Optional Pt100 external sensor support allows remote temperature monitoring. Alarm output permits automated shutdown or activation of ancillary devices.
