MULTI 3400i MULTI-PARAMETER METERS
Multi-parameter meter for monitoring pH, oxygen, and conductivity
 
Multi-parameter meters FEATURES:
 
  • Accurate, rugged and easy to use
  • Up to three parameters measured at once (including temperature)
  • Up to 2500 hours continuous operation
 
Multi-parameter Meters Product Description

The compact precision Multi 3400i Multi-parameter Meters enable you to carry out pH measurements, dissolved oxygen (DO) measurements and conductivity measurements quickly and reliably.  The Multi 3400i Multi-parameter Meters provide the maximum degree of operating comfort, reliability and measuring certainty for all applications.  The multi-parameter meter is hose-proof with battery or optional AC adapter and is optimally suited for use in the field, in laboratories, or at production sites.

The Multi 3400i Multi-parameter Meters have several useful features including an energy saving feature to avoid unnecessary battery depletion.  The energy saving feature switches the multi-parameter meter off if no key has been pressed for an hour.  The multi-parameter meter can perform pH measurements with or without a temperature sensor or by using the conductivity or oxygen probe's built in temperature sensor.  The multi-parameter meters recognize which sensors are connected and automatically switch to the correct mode for the temperature measurement.  The multi-parameter meter's AutoRead function (drift control) checks the stability of the measurement signal.

pH/Oxi or pH/Cond Multi-parameter Meters
WTW multi-parameter meters stand for precise multi-parameter measuring technology.  The pH/Oxi 3400i multi-parameter meter for the determination of pH, oxygen and temperature and the pH/Cond 3400i multi-parameter meter for the determination of pH, conductivity and temperature are favorably-priced alternatives to the single parameter instruments for applications which require the measurement of several parameters.  The multi-parameter meters are hose-proof and also meet the requirements of IP 67.  Kits include a professional case with sample beakers, multi-parameter meter, pH electrode and oxygen or conductivity sensor, STH 320 stand and calibration and maintenance supplies.

TetraCon® 325 Conductivity Probe
The TetraCon® 4-electrode system sets a new standard for professional conductivity measurements.  In comparison with conventional measuring cells with 2 electrodes, the TetraCon® 325 conductivity cell offers numerous technical advantages:

  • Highly accurate and linear because of optimized cell geometry
  • Extremely large measuring range with just one cell
  • Long-term cell constant stability with high-quality abrasion-resistant graphite electrodes
  • Built-in temperature sensor as standard
  • Smallest immersion depth possible
  • Automatic resistance compensation provides accurate measurements even with a dirty electrode
  • Measurement not affected by cable influences, polarization effects or contact with side walls
  • Robust, unbreakable epoxy body

Multi-parameter Meters Specifications

  pH/ORP measurement Oxygen measurement Conductivity measurement
RANGE/RESOLUTION pH:
     -2.00 to 19.99 / 0.01
mV:
     -1999 to +1999 / 1
Temp.:
     23 to 221 °F (-5.0 to 105.0 °C) / 0.1 (0.1)
O2 Concentration:
     0.00 to 19.99 mg/l / 0.01
     0.0 to 90.0 mg/l / 0.1
O2 Saturation:
     0.00 to 199.9% / 0.1
     0.0 to 600% / 1
Temp:
     32 to 122 °F (0.0 to 50.0 °C) / 0.1 (0.1)
Conductivity:
     0 to 1999 uS/cm / 1
     0.00 to 19.99 mS/cm / 0.01
     0.0 to 199.9 mS/cm / 0.1
     0 to 500 mS/cm / 1
Salinity:
     0.0 to 70.0 according to the IOT table / 0.1
Temp:
     23 to 221 °F (-5.0 to 105.0 °C) / 0.1 (0.1)
PRECISION (+ 1 DIGIT) pH:
     + 0.03 (+2 pH units around the calibration point)
mV:
     + 1
Temp:
     + 0.1
 
O2 Concentration:
     + 0.5 % of measured value at ambient temperature +41 to +86 °F (+5 to +30 °C)
O2 Saturation:
     + 0.5 % of measured value when measuring in the range of + 10 K around the calibration temperature
Temperature Compensation:
     <2% at +32 to +104 °F (+0 to +40 °C)
Temp °C:
     + 0.1
Conductivity:
     + 0.5 % of value
Salinity:
     + 0.1 from +41 to +77 °F (+5 to +25 °C)
     + 0.2 from +77 to +86 °F (+25 to +30 °C)
Temp:
     + 0.1
 
TEMPERATURE COMPENSATION Automatic:
     23 to 221 °F (-5 to +105 °C)
Manual:
     -4 to 266 °F (-20 to +130 °C)
32 to 122°F (0 to +40 °C)
<2% from 32 to 104 °F (0 to +40 °C)
Non-linear function for ultrapure and natural waters to EN 27 888
REFERENCE TEMPERATURE N/A N/A 68 °F/77 °F (20 °C/25 °C) selectable

Serial Interface:
     Baud Rate: Adjustable: 1200, 2400, 4800, 9600 Baud
     Type: RS232, data output
     Data Bits: 8
     Stop Bits: 2
     Parity: None
     Handshake: RTS/CTS + Xon/Xoff
     Cable Length: Max. 15m
Ambient Conditions:
     Storage: -13 to +149 °F (-25 to +65 °C)
     Operation: 14 to 131 °F (-10 to +55 °C)
     Climatic Class: 2
Power:
     Batteries: 4 x 1.5 V alkali-manganese, type AA
     Operational Life: approx. 3000 operating hours
     Plug-in Power Supply:
          Input: 100 to 240 V ~ / 50 to 60 Hz / 400 mA
          Output: 9 V = / 1.5 A
IP Rating: IP-66
Certifications: cETLus, CE
Electrical Safety: Protective class III
Weight: 0.7 lbs (0.3 kg) (without plug-in power supply)
Size: 6.8x3.1x1.5 in (172 x 80 x 37 mm)

CellOx® 325 Probe
Electrode material: Gold (Working), Lead (Counter)
Shaft material: POM
Measuring range: 0 to 50 mg/l O2, 0 to 600% O2
Temperature range: 32 to 122 °F (0 to 50 °C)
Min/max immersion depth: 2.4in to 65ft (6cm to 20m) depending on cable length
Shaft length: 7.38 in (187.5 mm)
Diameter: 0.70 in (17.5 mm)
Weight: 6 oz (170 g)
 

TetraCon® 325 Probe
Electrode material: Graphite
Shaft material: Epoxy
Shaft length: 4.72 in (120 mm)
Cell constant: K = 0.475 cm-1
Diameter: 0.60 in (15.3 mm)
Measuring range: 1 uS/cm to 2 S/cm
Temperature range: 32 to 212 °F (0 to 100 °C)
Min/max immersion depth: 1.4/4.7 in (36/120mm)

Multi-parameter Meters Options

Multi 3400i Kit Multi-parameter Meter
Includes Multi 3400i, SenTix® 41-3 pH electrode, CellOx 325-3 oxygen electrode, TetraCon 325-3 conductivity sensor, Tech. buffers 4 and 7, 3 M KCl, cleaning solution, 3 exch. membr. heads, electrolyte, abrasive foil, cond standard (1413 µS/cm)  All sensors have 9.8 ft (3 m) of cable.
   
pH/Cond 3400i Set Multi-parameter Meter
Includes pH/Cond 3400i, SenTix® 41-3 pH electrode, TetraCon 325-3 conductivity sensor, beaker, cond standard (1413 µS/cm)  All sensors have 9.8 ft (3 m) of cable.
   
pH/Oxi 3400i Set Multi-parameter Meter
Includes pH/Oxi 3400i, SenTix® 41-3 pH electrode, CellOx 325-3 oxygen sensor, 3 exchange membrane heads, cleaning solution, abrasive foil, technical buffers 4 and 7, 3 M KCl  All sensors have 9.8 ft (3 m) of cable.
   
RELATED PRODUCTS
Multi 3500i Kit Handheld Multi-parameter Meter
Includes Multi 3500i, SenTix® 41-3 pH electrode, ConOx-3 conductivity/oxygen electrode, PC comm. pkg, case & acc..  All sensors have 9.8 ft (3 m) of cable.
   
Multi 1970i Portable Multi-parameter Meter
Multiparameter meter with universal AC power supply.  Probes not included.
   
pH/Ion 3400i Ion Selective Electrode Analyzer
Electrodes not included.
   
U-22XD Multiparameter Probe
Use the multiparameter probe to monitor 10 different parameters, including total suspended solids, water depth, and ORP.
   
W-23XD Water Quality Sonde
Water quality instrumentation for simultaneously measuring up to 13 different parameters.
   
Water quality sensors for permanent installation.
 

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