Services > Ion Selective Electrodes (ISE)

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These solid-state sensors have a huge advantage over conventional ISEs in that there is no internal fill solution to degenerate the sensor. This means that combination ISEs have an unrivalled lifetime and a very low cost of ownership.

These combination ISEs can be stored dry and are submersible and waterproof. The solid-state sensor and maintenance free reference makes these electrodes ideal for both laboratory and field work. The Epoxy tubular body provides complete protection to the electrode which allows these sensors to be used in field applications by unskilled operators.

All sensors are compatible with Smart Storms USI and USM products.

Ammonia Copper Nitrate Sodium
Ammonium Cyanide Nitrite Sulphide
Barium Fluoride Perchlorate Thiocyanate
Bromide Iodide Potassium
Cadmium Lead Silver
Chloride Mercury Sodium

 

EDT direction electrodes are rugged solid  state sensors with built in driTEK Teflon  double junction references that do not  require filling solutions, membrane replacements or operator maintenance. These combination ISEs can  be stored dry and are submersible and waterproof. The solid  state sensor and maintenance free reference makes these electrodes ideal  for both laboratory and field work.  The Epoxy tubular body provides complete protection to the electrode which  allows  these sensors to be used in field applications by unskilled operators.

There are two basic sensor constructions: PVC on a solid  state substrate and Crystal  membrane with a solid  state contact. Crystalline electrodes maybe polished and cleaned as the electrode gets older.

The PVC equivalents are less  prone to oxidation and can  be rinsed after use but  cannot be polished. The lack of internal solution means that lifetime is enhanced and submersion is possible as the sensor does not  flex under reasonable pressure.

Each EDT directION Combination ISE has a 1 metre cable and a BNC connector (other connectors available on request) allowing use on all types of pH/ION meter including laboratory bench and research models. For direct concentration reading and absolute simplicity the EDT DR359TX pH/ION meter is the perfect instrument for these ISEs.The solid  state sensors have a huge advantage over  conventional ISEs in that there is no internal fill solution to degenerate the sensor this  means that EDT direction combination ISEs have an unrivalled lifetime and a very low cost  of ownership.

EDT are a UK based manufacturer and produce ISEs for many prominent companies in the water testing sector. As a result our  ISEs are very competitively priced and come complete with technical support provided from our  vast  library of applications and our  in house electrochemistry technicians.For optimum results use EDT direction standards and Ionic Strength Adjustment Buffers ( ISABs).

Cat. No Species Limits (ppm) Temp Range Interferences pH Range
3302 Ammonia 0.02 – 17,000 0-50°C Hydrazine 11-13
3051 Ammonium 0.9 – 9,000 0-50°C K⁺ Na⁺ 0-8.5
3081 Barium 1.4 – 13,700 0-50°C K⁺ Na⁺ Sr⁺⁺ 3-10
3271 Bromide 0.4 – 81,000 5-50°C I¯ S¯¯ CN¯ 1-12
3241 Cadmium 0.1 – 11,200 5-50°C Cu⁺⁺ Hg⁺⁺ Ag⁺ 3-7
3041 Calcium 0.02 – 4,010 0-50°C Ba⁺⁺ Al⁺⁺⁺ Sr⁺⁺ 3.5-11
3091 Carbonate 0.008 – 80 0-50°C OAc ¯ SCN¯ 6.6-9.6
3261 Chloride 1-35,500 5-50°C I¯ Br¯ CN¯ S¯¯ 1-12
3227 Copper 0.006 – 64,000 5-50°C Hg⁺⁺ Ag ⁺ S¯¯ 2-7
3291 Cyanide 0.03 – 260 5-50°C Br¯ I¯ S¯¯ 11-13
3221 Fluoride 0.02 – -1,900 5-50°C OH¯ 4-8
3281 Iodide 0.06 – 127,000 5-50°C S¯¯ CN¯ 2-12
3231 Lead 0.2 – 20,800 5-50°C Hg⁺⁺ Ag⁺ Cu⁺⁺ 3-7
3251 Mercury 0.2 – 201,000 5-50°C Ag⁺ S¯¯ 0-2
3921 Nitrate 0.4 – 62,000 0-50°C Cl¯ NO¯¯ 2-11
3271 Nitrite 0.5 – 460 0-50°C CN¯ 4.6-8
3061 Perchlorate 0.2 – 99,500 0-50°C I¯SCN¯NO3¯ 0-11
3031 Potassium 0.04 – 39,000 0-50°C Cs⁺ NH4⁺ 1-9
3211 Silver 0.01 – 107,900 5-50°C Hg⁺⁺ S¯¯ 1-9
3301G Sodium 0.002 – 69,000 0-50°C Li⁺ K⁺ Ba⁺⁺ 9-12
3301 Sodium 1-35,000 0-50°C S¯¯ Br¯ CN¯ I¯ 1-12
3225 Sulphide 0.003 – 32,000 0-50°C Hg ⁺⁺ Ag⁺ 13-14
3229 Thiocyanate 1 – 5,800 5-50°C Cl¯ Br¯ I¯ S¯¯ 2-12

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