Envco – Environmental Equipment

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.

FEATURES:
• Accurate, rugged and easy to use
• Up to three parameters measured at once (including temperature)
• Up to 2500 hours continuous operation

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
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)

Ordering Information
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.