KNAUER High Precision AZURA P 8.1L UHPLC Pump

The KNAUER AZURA P 8.1L is a high-performance UHPLC pump designed for ultra-fast and high-resolution chromatographic applications. With a maximum pressure of 1240 bar (124 MPa) and flow rates up to 5 mL/min, it meets the demands of modern UHPLC workflows.

The pump features a dual serial piston mechanism combined with adaptive pulsation compensation, which operates independently of flow rate, pressure, and solvent type through real-time monitoring of eluent compressibility and variable piston stroke.

Together with KNAUER’s advanced piston drive technology, this results in exceptional flow reproducibility under all operating conditions. High-precision in-house manufacturing ensures long piston seal lifetime and maximum system uptime.

Key Features

• UHPLC pump up to 1240 bar
• Flow rates up to 5 mL/min
• Dual serial piston system
• Adaptive pulsation compensation
• Excellent flow reproducibility
• HPG gradient capability
• Integrated 4-channel degasser
• RFID pump head detection
• Low baseline noise
• High durability and long lifetime
• Compatible with UHPLC and LC-MS systems

Technical Specifications

Solvent Delivery

• Pump type: analytical UHPLC pump
• Mechanism: dual serial piston
• Max pressure: 1240 bar
• Flow rate: up to 5 mL/min
• Flow accuracy: ± 0.25%
• Precision: ≤ 0.04% RSD

Gradient

• Type: HPG (high-pressure gradient)
• Range: 0–100% (0.1% steps)
• Accuracy: ± 0.3%
• Precision: < 0.1% RSD

Degasser

• Channels: 4
• Max flow: 5 mL/min per channel
• Residual O₂: < 0.5 ppm
• Technology: fluoropolymer membrane

Connections

• Inlet: UNF 1/4-28 (1/8” tubing)
• Outlet: UNF 10-32 (1/16” capillary)

Materials

• PEEK, Tefzel®, Systec AF
• Compatible with most solvents (except HCl and halogenated hydrocarbons)

Control & Communication

• LAN, analog inputs
• Event outputs (TTL, relay)
• Optional mobile control
• RFID pump head detection

Safety & Operating Conditions

• Leak sensor
• Soft start and programmable pressure limits
• Temperature: 4–40 °C
• Humidity: < 90% non-condensing

Dimensions & Power

• Dimensions: 361 × 208 × 523 mm
• Weight: 26.7 kg
• Power supply: 100–240 V, 50–60 Hz
• Power consumption: max 310 W