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Ion Selective Electrodes

Our high quality ion selective electrode feature:
  • High Sensitivity: Most ions can be measured to below 1 micro. Some ions such as copper (+2) can be measured down to the low part per billion range.
  • Fast response time: Due to membrane design parameters ion selective have a rapid response to changing ionic concentration. Response time of 30 seconds is typical.
  • Broad concentration range: Electrodes will detect ions down to the low part per million range up to several thousand ppm. Some of the electrodes will measure up to a concentration of 1 Molar.
  • Resistant Body: Makes electrodes usable in acids, bases and some solvents.
  • Portable: On-the-spot field measurements can be made without a trip back to the laboratory.
  • Small Samples: Measures samples as small as 5 ml. Some of the combination ion electrodes will read down to just 2 ml of liquid.
  • Quick and Simple Readings: The electrodes can be used with any portable or laboratory pH/millivolt meter.
  • Direct Plug: Our electrodes plug directly into your pH/millivolt meter. No compatibility problems.
  • Best buy! Complete ion measurement systems measure, log & graph all in one!

    You can now purchase ion electrodes as a complete measurement system which measures, logs and graphs all-in-one. System includes meter, ion electrode, our exclusive PC plotting software and more.

    See features and advantages of complete ion systems.
    Pricing and specifications for both electrodes and complete systems are below.

    All ion selective electrodes in the table below are combination electrodes where the reference electrode is already included within the body of the ion selective electrode. Mono electrodes without the reference electrode are also available upon request. Please contact us for pricing and delivery. Request further product details by email

    Scroll further for ion specifications ------------------------------------------->

    ** Add -XS to catalog numbers for system catalog numbers
    Electrode type Cat. No. Cost for electrode Cost for full system Measurement
    Range (M)
    pH Range Temp. Range (oC) Interferences
    Ammonia LGS-136NH $792.00 $1270.00 5exp-7 to 1.0 0.01 to 17,000above 110 to 50volatile aminues
    Bromide LIS-146BRC $792.00 $1205.00 5exp-6 to 1.0 0.4 to 79,0002 to 140 to 80S-, I-, CN-, high levels of CL- and NH3
    Cadmium LIS-146CDC $792.00 $1205.00 1exp-7 to 1exp-1 0.01 to 11,2002 to 120 to 80Ag+, Hg+2, Cu+2
    Calcium LIS-146CAC $792.00 $1255.00 5exp-6 to 1.0 0.2 to 40,0003 to 100 to 50Pb+2, Hg+2, Cu+2, Ni+2
    Carbon Dioxide LGS-136CO $792.00 $1235.00 exp-2 to exp-4 4.4 to 4404.8 to 5.20 to 50Volatile weak acids
    Chloride LIS-146CLC $792.00 $1205.00 5exp-6 to 1.0 1.8 to 35,5002 to 120 to 80S-2, I-, CM-, Br-
    Copper LIS-146CUC $792.00 $1205.00 1exp-8 to 1exp-1 0.0006 to 6,3502 to 120 to 80Ag+, Hg+2
    Cyanide LIS-146CNC $792.00 $1205.00 5exp-6 to 1exp-2 0.13 to 26011 to 130 to 80S-2, I-, Br-, Cl-
    Fluoride LIS-146FC $792.00 $1205.00 1exp-6 to saturated 0.02 to saturated5 to 80 to 80OH-
    Fluorborate LIS-146FLC $792.00 $1270.00 6exp-6 to 1.0 0.1 to 10,8002.5 to 110 to 50ClO4-, I-, CN-
    Iodide LIS-146IC $792.00 $1205.00 5exp-8 to 1.0 0.006 to 127,0000 to 140 to 80S-2, CN-, Br-, Cl-
    Lead LIS-146LIC $792.00 $1205.00 1exp-6 to 1exp-1 0.2 to 20,7003 to 80 to 80Ag+, Hg+2, Cu+2, high levels Cd+2 and Fe+2
    Nitrate LIS-146NOC $792.00 $1205.00 7exp-6 to 1.0 0.6 to 62,0002.5 to 110 to 50ClO4-, I-, CN-, BF4-
    Perchlorate LIS-146PERC $670.00 $1270.00 7exp-6 to 1.0 0.7 to 98,0002.5 to 110 to 50no significant interferences
    Potassium LIS-146KC $792.00 $1255.00 1exp-6 to 1.0 0.04 to 39,0002 to 120 to 50Cs+, NH4+
    Silver/sulfide LIS-146AGSC $792.00 $1255.00 1exp-7 to 1.0 AG = 0.01 to 107,900
    S = 0.003 to 32,100
    2 to 120 to 80Hg+2, Hg+
    Sodium LIS-146NAC $670.00 $1270.00 1exp-6 to saturated 0.2 to 23,0005 to 120 to 80H+, K+, Li+, Ag+, Cs+, Tl+
    Surfactant LIS-146SURC $510.00 $1355.00 1exp-5 to 5exp-2 1.0 to 12,0002 to 120 to 50similar types of surfactants
    Thiocyanate LIS-146SCNC $690.00 $1270.00 5exp-6 to 1.0 0.3 to 58,0002 to 100 to 80S+2, CN-, I-, Br-, S2O3-2, NH3
    Water hardness LIS-146WHC $520.00 $1270.00 1exp-5 to 1.0 0.4 to 40,000 (as Ca)5 to 100 to 50Cu+2, Zn+2, Mi+2, Fe+2

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