Sodium Analyzer



  • Ultrapure water production/monitoring
  • Water/steam cycle
  • Power plants
Sodium Analyzer


The 3S-NA sodium analyzer takes measurements with an Ion Selective Electrode (ISE) sensitive to sodium ions in solution. The response of the electrode is proportional to the sodium concentration in the sample on a logarithmic scale. The instrument can take measurements on (up to) four different input streams. The multiposition switching valve makes the channel selection operations fully automatic, with timing and scheduling programmable by the user. Each sample line has its dedication fast loop reservoir to minimize cross interferences and switching times.



Measured parameter Na+


Full scale 10 ppb or 20 ppm


* if two values take whichever is greater.
± 5% / ± 0.1 ppb
Demineralized water Not required
Number of reagents 1

Technical Specifications

Model 3S-NA
Sampling Mode Continuous.
Sample Pressure: Atmospheric
Temperature: 2 ‐ 55°C (36 ‐ 133 °F)
Flow Rate: 80 to 500 mL/min
Connection: 6 mm (¼-in.)
Drain Pressure-free drain
Connection: 12 mm (½-in.)
Input Streams 4
Material Epoxy-coated stainless steel AISI 304
Dimensions (H x W x D) 604 x 380 x 210 mm (23.6 x 14.8 x 8.2 in)
Weight 20 kg (44 lbs)
Power Supply Input Voltage: 115 VAC,230 VAC
Power consumption: max. 80 W
Output signals 4 x 4-20 mA analog outputs
Modbus via RS485,Ethernet
Alarms 4 SPDT programmable voltage-free relays
Digital Input None, Online, Start Extra, Skip Idle, Emergency Stop
Ambient Temperature 5 - 45 °C (41 - 113 °F)
Ambient Humidity 10 - 90 % RH (non-condensing)
Protection Grade IP54 (indoor only, outdoor use possible with external cabinet, not included)

Related Accessories