High-pressure gradient semi-preparative HPLC pump

AZURA P 6.1L High-Pressure Pump with 50 ml pump head, stainless steel, without Degasser

The AZURA® Pump P 6.1L uses technology to overcome the challenges of pumping LC solvents at high pressure and high flow rates. This pump is designed to fulfill the needs for high-pressure and low-pressure mixing tasks. The pump can deliver flow in the range of 0.001–50 ml/min at pressures up to 1000 bar (depending on model). The AZURA® binary pump contains two identical high-pressure pumps, a 2 × 2-channel inlet solvent selection valve and the new developed AZURA® mixer, a low-volume mixing device. The AZURA® quaternary pump contains one high-pressure pump and an integrated LPG mixing block with a 4-channel inlet solvent selection valve and the new developed AZURA® mixer, a low-volume mixing device. The integrated degasser and AZURA® inline filter are completing the analytical AZURA® HPLC pump and turn this pump into a working horse in the lab. This pump is also available with wetted materials made from ceramic, PEEK and titanium for biocompatible applications.

General information

Max. flow rate50 ml/min
Flow rate range0.01 – 50 ml/min
Flow rate increment0.001 ml/min
Pressure range
Maximum delivery pressure [psi]4350 psi
Maximum delivery pressure [MPa]30 MPa
Maximum delivery pressure [bar]300 bar
Pump head materialsStainless Steel
GradientHigh pressure gradient (binary)
Leak managementYes
Wetted materialsGFP (graphite fiber reinforced PTFE), sapphire, ruby, PEEK, stainless steel, FKM
Pump featuresActive pulsation compensation, RFID for automatic pump head detection, Integrated pressure sensor, Purge valve (manual), Leak management, Piston seal wash


Power supply100–240 V; 50–60 Hz; Maximum power consumption 100 Watt
Dimensions361 mm × 208.2 mm × 523 mm (W × H × D)
Weight14.1 kg
Leak sensorYes
Ambient conditions4–40 °C (39.2–104 °F) Air humidity below 90 %, non-condensing
InterfacesLAN, Pin header connectors (Analog IN, Start In, Error IN)
ControlLAN, Analog and event control, Mobile Control
Analog inputsFlow rate, 0–10 V via pin header connectors
Analog outputs8 event outputs (TTL, OC, Relais) and 24 V
Best working conditions0.1 – 40.0 ml/min
Continuous working conditions0.1 – 20.0 ml/min
Flow rate accuracy± 1%
Flow rate accuracy conditionsmeasured at 5–80 % of flow range, using ethanol
Flow rate precision≤ 0.04 % RSD or 0.008 min SD (whichever is greater)
Flow rate precision conditionsbased on the retention time at constant room temperature
Gradient range0–100 %
Gradient range (recommended)5 – 95 %
Gradient accuracy± 0.3 % at 1 ml/min, 150 bar (ethanol/caffeine tracer) ± 1 % (5 – 95 %, measured at 0.1 – 10 ml/min, water/caffeine tracer)
Gradient precision< 0.1 % RSD at 1 ml/min, 0.3% RSD overall, based on retention time at constant room temperature
Gradient minimum increment0.1 %
Mixing volume200 µl
Delay volume210 µl with 200 µl Mixer
Pump typeBinary analytical HPLC pump without degasser
Solvent selection valve2 x 2 channels
Pulsation< 2 % Amplitude (typically: < 1.3 %) or < 3 bar (0.3 MPa), whatever is greater, at 1 ml/min ethanol, at all pressures > 10 bar (1 MPa, 147 psi)
Pulsation compensationActive pulsation compensation
Active piston seal washYes
Piston seal washingYes
System protectionSoft start, Pmin und Pmax are programmable
Pump Outlet threadFemale UNF 10-32 (coned)
Pump head inlet (standard)UNF 1/4-28 Thread
Pump head outlet (standard)UNF 10-32 Thread
High-pressure gradient semi-preparative HPLC pump
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