WTW MultiLine® IDS

The new multi-parameter systems with intelligent, digital sensors for pH, dissolved oxygen (DO) and conductivity measurement revolutionize multi-parameter measurement:
The signal processing is completely located in the sensor, and the measuring signal is transmitted to the meter without interference and in a clearly identifiable manner via thin, highstrength cables. A wide range of sensors are available for virtually every application.

  • Features
  • Multi 3510 IDS
  • Multi 3620 IDS
  • Multi 3630 IDS

The MultiLine® meters are in a class of their own:
3 models with one, two or three universal channels measure every parameter either sequentially or simultaneously. Every model possesses a brilliant color graphic display, two USB interfaces (USB-A and Mini-USB), and rechargeable batteries that can be charged directly in the device.


Field Sets for Portables
Handhelds are available in convenient carry cases including sensors and accessories for immediate use. Meter sets with three sensors will be delivered in the large field case including accessories.

Multi 3510 IDS

  • 1 Channel
  • 3 Parameters
  • High resolution color graphic display
  • Safe data transmission to USB stick
  • NEW: now ready for turbidity measurement – VisoTurb® 900-P
  • NEW: now ready for wireless measurements

One measurement channel for different parameters: For those who need to measure mainly one parameter, but occasionally require a second or third.

D.O. measurement (optical), Concentration 0.00 … 20.00 mg/l
D.O. measurement (optical), Saturation 0.0 … 200.0 %
D.O. measurement (optical), Partial pressure 0 … 400.0 hPa
D.O. measurement (optical), Temperature 0.0 … 50.0 °C
pH – 2.0 … 20.0 pH
– 2.00 … 20.00 pH
– 2.000 … 20.000 pH
mV ± 2000
± 1250.0
pH/mV, Temperature – 5.0 … 105.0 °C
Conductivity 0.0 … 2000 mS/cm
Conductivity, additionally 0.00 … 19.99 µS/cm
K = 0.1 cm–1
Conductivity, Spec. resistivity 0.00 … 20 MΩ cm
Conductivity, Salinity 0.0 … 70.0 (acc. IOT)
Conductivity, TDS 0 … 1999 mg/l
0 … 199.9 g/l
Conductivity, Temperature – 5.0 … 105.0 °C

Multi 3620 IDS

  • 2 Channels
  • 2 Parameters in any combination
  • High resolution color graphic display
  • Safe data transmission to USB stick
  • NEW: now ready for turbidity measurement – VisoTurb® 900-P
  • NEW: now ready for wireless measurements

Two measurement channels: For simultaneous measurement with two similar or different sensors.

D.O. measurement (optical), Concentration 0.00 … 20.00 mg/l
D.O. measurement (optical), Saturation 0.0 … 200.0 %
D.O. measurement (optical), Partial pressure 0 … 400.0 hPa
D.O. measurement (optical), Temperature 0.0 … 50.0 °C
pH – 2.0 … 20.0 pH
– 2.00 … 20.00 pH
– 2.000 … 20.000 pH
mV ± 2000
± 1250.0
pH/mV, Temperature – 5.0 … 105.0 °C
Conductivity 0.0 … 2000 mS/cm
Conductivity, additionally 0.00 … 19.99 µS/cm
K = 0.1 cm–1
Conductivity, Spec. resistivity 0.00 … 20 MΩ cm
Conductivity, Salinity 0.0 … 70.0 (acc. IOT)
Conductivity, TDS 0 … 1999 mg/l
0 … 199.9 g/l
Conductivity, Temperature – 5.0 … 105.0 °C

Multi 3630 IDS

  • 3 Channels
  • 3 Parameters in any combination
  • High resolution color graphic display
  • Safe data transmission to USB stick
  • NEW: now ready for turbidity measurement – VisoTurb® 900-P
  • NEW: now ready for wireless measurements

Three measurement channels can be used in any combination for similar or different parameters: Simultaneous multi-measurement without compromise.

D.O. measurement (optical), Concentration 0.00 … 20.00 mg/l
D.O. measurement (optical), Saturation 0.0 … 200.0 %
D.O. measurement (optical), Partial pressure 0 … 400.0 hPa
D.O. measurement (optical), Temperature 0.0 … 50.0 °C
pH – 2.0 … 20.0 pH
– 2.00 … 20.00 pH
– 2.000 … 20.000 pH
mV ± 2000
± 1250.0
pH/mV, Temperature – 5.0 … 105.0 °C
Conductivity 0.0 … 2000 mS/cm
Conductivity, additionally 0.00 … 19.99 µS/cm
K = 0.1 cm–1
Conductivity, Spec. resistivity 0.00 … 20 MΩ cm
Conductivity, Salinity 0.0 … 70.0 (acc. IOT)
Conductivity, TDS 0 … 1999 mg/l
0 … 199.9 g/l
Conductivity, Temperature – 5.0 … 105.0 °C