These ISE feature polymer membrane sensors. Measuring range is 1.0 to 5 x 10^-6 M and 18,000 to 0.1 ppm. Interfering ions include K⁺. Ideal for boiler feed water, natural water and fertilizers. User must supply calibration standard.

Temperature range: 0 to 50°C (32 to 122°F)
pH range: 4 to 10 pH

ISE solution kits contain the solutions and accessories needed for calibration, sample preparation and measurement of ion concentration and activity. All solutions are supplied with MSDS (Material Safety Data Sheet) and have a value of 1000 ppm.

Ion Selective Electrodes

Oakton has a large selection of Ion Selective Electrodes (ISE) to suit a wide variety of applications. Each electrode has a typical response time of 20 to 30 seconds but will vary with solution concentration. All electrodes are refillable and include 15 mL of electrolyte and filling pipette. Solid state electrodes also include polishing strips. Gas sensing electrodes also include replacement membranes. OAKTON offers three electrode types: Membrane/Solid State, Gas Sensing, and Glass bulb.

NOTE: Electrodes do NOT include calibration standard or Ion Strength Adjusters (ISA)-These must be made by the user or purchased separately.

Electrode Types

Membrane and Solid State - There are three types of membrane and solid state electrodes

• Economy epoxy body double-junction
  • Outer reference chamber is silver-free-resists contamination
    
    Economy epoxy body double-junction
• Glass body double-junction
  • Improved seal-glass seal provides enhanced electrode performance and reliability
  • Outer reference chamber is silver-free-resists contamination
  
  Glass body double-junction
• Spring-loaded single-junction
  • Produces higher flow of electrolyte
  • Great for viscous fluids
  • Press cap to flush electrolyte- cleans/refreshes reference junction when flushed
  
  Spring-loaded epoxy body single-junction

Gas Sensing-single-junction, epoxy body

• Removable cap with membrane and fill solution
• Gas diffuses across membrane until partial pressure of gas is equal on both sides. Sensor detects change in fill solution composition that is directly proportional to the concentration of gas

Glass (sodium) Bulb-epoxy body single-junction and glass body double-junction

• Glass bulb uses specially formulated glass specific for sodium ion measurement