Specifications:

• DC resistance at 25°C ≤ 5.0 MOhm
  
• Minimum sample volume = 5 ml
  
• Preconditioning / Standard solution : NaNO3 1000 ppm as (NO3)
  
• Preconditioning time : at least 5 minutes
  
• Optimum pH range : pH 4.6 to pH 8
  
• Temperature range : 5°C to 50°C
  
• Optimum temperature : 25°C
  
• Recommended ISAB : 2M (NH4)2SO4 or 1M KAl(SO4)2 (Stock concentration to be diluted)
• Recommended reference electrode : Double Junction Reference electrode outer filling solution
  :0.04M (NH4)2SO4 or 0.1M CH3COOLi or 0.1M KAl(SO4)2
  
• Electrode slope at 25°C 54 ± 5 mV/decade
  
• Linear measuring range : 3.1 to 62,000 ppm
  
• Total measuring range : 0.4 to 62,000 ppm
  
• Detection limit : 0.4 ppm
  
• Response time (time to complete 90% of the change in potential after immersion in the new
  solution.) < 10 seconds
  
• Time for stable reading after immersion 2 to 3 minutes
  
• Potential drift (in 1000 ppm) < 3 mV/day
  
• Selectivity coefficients k(NO3-: X)
  

Cl- : 5.6 x 10-3
HCO3- : 5 x 10 -3
NO2- : 1 x 10 -3
CH3COO- : 4.5 x 10 -4
F- : 1 x 10-4

• Recalibration Frequency : Depending on precision requirements -
  

Designs:

• Sealed Maintenance free Combination ISE, fixed cable
• Sealed Maintenance free Combination ISE, detachable cable
• Submersible ISE Combination
• Submersible ISE Mono(Half-Cell)
• Flushable Combination ISE
• Custom Built