• Drinking water
  • Industrial waste water
  • Municipal waste water
  • Surface water


The determination ranges of the aluminum analyzer vary from trace μg/L to 20 mg/L Al3+ using the (optional) internal dilution  module.


In a pH 6.2 to 6.4 buffered solution pyrocatechol violet and Al(III) form a blue colored compound. The absorbance intensity is proportional to the aluminum concentration in the sample and is measured at 572 nm.


(Ø 26 mm)
150 ppb
(Ø 16 mm)
250 ppb
(with dilution)
20 ppm
Wavelength 572 nm
Number of reagents 2
Min. analysis time 8 minutes

Technical Specifications

Model 3S-CL
Sampling Mode Batch, with freely settable frequency.
Sample Pressure: Atmospheric
Temperature: 5 ‐ 45°C (41 ‐ 113°F)
Flow Rate: 80 to 500 mL/min
Connection: 6 mm (¼-in.)
Drain Pressure-free drain
Connection: 12 mm (½-in.)
Input Streams 2
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,24 VDC
Power consumption: max. 80 W
Output signals 2 x 4-20 mA analog outputs
Modbus via RS485,Ethernet
Alarms 2 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)