Model 3HM: High Pressure Liquid Metering Pump

  • Flow rates between 0.04 to 80 mL/min. with reciprocating piston design.

  • High Pressure capabilities, to 750 psi.

  • Corrosion resistant materials.

  • The 3HM comes with a 1/4" piston and pump head.
  • These pumps can be used wherever precise flow rate control, particularly at high pressures, is required.
  • These metering pumps are based on a positive displacement, reciprocating piston design, which gives you precise flow control.
  • The Optos pump provides a simple interface for ease of control over flow rates, refill rates, compressibility compensation and other pump parameters.
  • The Optos pump can be controlled from either the local LCD display and membrane keypad, or remotely, using either RS232 commands or analog controls (either 0-5VDC or 4-20mA).
  • The materials in the liquid end of the Optos Series pumps are carefully chosen for corrosion resistance.
  • he piston is sapphire, and the inlet and outlet valves incorporate sapphire seats and ruby balls.
  •  A fully integrated piston wash system is included in the Optos pumps, dramatically extending piston seal life.
  • The Optos Series pump, only four inches wide, occupies very little bench space. The design is simplified for optimal reliability.
  • Plus versions of 3HM pumps come with an integrated pulse damper to further reduce pulsation, and the ability to monitor pressure and set high and low pressure limits. 
  • The optional heads use 3/32" or 1/4" pistons and pump heads. 
  • 3HM metering pumps can be made with PEEK liquid end assemblies, as opposed to the usual type 316 stainless steel, eliminating all metal contact in the flow path. For the PEEK version of this model, click on 3HI.
  • Valves with special fittings available on request.

Precise Metering

Reciprocating Piston Design

Versatile, Easy to Use

Convenient Control Options

Corrosion Resistance

Piston wash

Simple, robust construction

Upgrade to Plus: Minimize Pulsation, Monitor Pressure

Option: Three Interchangeable Pump Heads


Option: Non Metallic

Applications Include

Optos pumps are designed and ideally suited for numerous applications, including:

  • HPLC
  • Reactant/chemical feed
  • Column washing
  • Pilot plant
  • Post column reaction
  • Flow injection analysis