SY 25 mL Multi-Volume Precision Syringe Pump (CAT#: STEM-AL-2619-ZJF)

This SY unit is a programmable open-frame syringe pump for controlled liquid transfer. It is operated from an external computer and can automate aspiration and dispensing cycles. The module is available for 5 mL, 12.5 mL, and 25 mL syringe configurations. Each version uses a 30 mm rated stroke with a high-resolution lead-screw drive. The listed back-pressure capability varies with the selected syringe capacity. Borosilicate glass, PTFE, PVDF, and FFKM are used in the wetted components. Communication through RS232 or RS485 supports external command and parameter control. The pump is intended for stable sample introduction and metered fluid delivery in integrated instruments.

Available Syringe Capacities: 5, 12.5, and 25 mL
Liquid Accuracy: Error ≤1% at rated stroke
Liquid Precision: 0.3-0.7% repeatability error at rated stroke
Expected Service Life: 3 million leak-free cycles with purified water
Back Pressure: 1.32 MPa for 5 mL, 0.51 MPa for 12.5 mL, and 0.25 MPa for 25 mL
Rated Stroke: 30 mm
Control Steps: 12000 steps
Maximum Speed: 600 rpm for 5 and 12.5 mL, and 450 rpm for 25 mL
Linear Speed: 0.017-10 mm/s for 5 and 12.5 mL, and 0.017-8.33 mm/s for 25 mL
Rated-Stroke Run Time: 3-1800 s for 5 and 12.5 mL, and 3.6-1800 s for 25 mL
Control Resolution: 0.0025 mm
Minimum Injection Volume: 0.416 uL for 5 mL, 1.042 uL for 12.5 mL, and 2.083 uL for 25 mL
Glass-Tube Inner Diameter: 14.55, 23.03, or 32.57 mm
Drive Structure: Trapezoidal lead screw with 1 mm lead
Wetted Materials: Borosilicate glass, PTFE, PVDF, and FFKM seal
Fluid-Path Pressure Reference: 0-0.5 MPa positive gas pressure and 0-0.06 MPa negative gas pressure
Port Thread: 1/4-28 UNF female
Communication Interface: RS232 and RS485
Communication Rate: 9600, 19200, 38400, 57600, or 115200 bps
Control Protocol: ASCII, custom, and Modbus
Power Supply: 24 VDC, 3 A
Operating Environment: 5-55 °C, below 80% RH, non-condensing
Weight: 0.53 kg for 5 mL, 0.58 kg for 12.5 mL, or 0.63 kg for 25 mL

Three selectable syringe-capacity versions
Programmable aspiration and dispensing
High-resolution plunger positioning
Capacity-specific pressure performance
Long-cycle leak-free design
Chemically resistant wetted materials
External serial control
Compact open-frame integration