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Mettler Toledo® SevenGo Duo and SevenGo Duo Pro pH Meters
Professional portable watertight (IP67) dual-channel meters with data memory, infrared interface for data transfer to a PC or a printer, bright backlighting and extensive GLP support - ideal for special requirements in regulated sectors or for measurements under extreme conditions. Mettler Toledo® pH Meters

Mettler Toledo® Seven2Go Meters
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Specifications Chart PH

Specifications Chart Dissolved Oxygen

Mettler Toledo® Seven2Go pH Meters

SevenGo Duo pro™
Professional portable watertight (IP67) dual-channel meters with data memory, infrared interface for data transfer to a PC or a printer, bright backlighting and extensive GLP support - ideal for special requirements in regulated sectors or for measurements under extreme conditions.

SevenGo Duo™
Watertight (IP67) portable dual-channel meters for routine pH measurement with a large display, data memory and indication of the electrode status - ideal for applications that require a high-quality meter with exceptional performance.

Intuitive and Easy Operation
Designed in such a way that a single keystroke triggers a calibration run, measurement or review of stored data.

Intelligent Sensor Management (ISM®)
ISM® leaves nothing to chance! Calibration data and history are stored in the sensor and transferred automatically upon connection to the meter.

Ergonomic Masterpiece
Fits your hand perfectly, regardless of whether you are right- or left-handed. Your thumb can reach all buttons – easy to operate.

Mettler Toledo® SevenGo Duo

Model SG23-B
51302600
SG23-ELK
51302601
SG23-FK2
51302602
SG78-B PRO
51302620
SG78-ELK PRO
51302621
SG78-FK2 PRO
51302622
SG78-USP/EP PRO
51302622
Price Mettler Toledo® SG23-B SevenGo Duo pH/conductivity meter (IP67) for routine use 0 to 14 pH
$995.10
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Mettler Toledo® SG23-ELK SevenGo Duo pH/ion/conductivity meter (IP67)  with InLab® Expert Pro-ISM and InLab®738-ISM 0 to 14 pH
$1,469.40
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Mettler Toledo® SG23-FK2 SevenGo Duo pH/ion/conductivity meter (IP67)  with InLab® Expert Pro-ISM and InLab®738-ISM and case 0 to 14 pH
$1,599.60
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Mettler Toledo® SG78-B SevenGo Duo PRO pH/conductivity meter (IP67) -2.000 to 19.999 pH
$1,674.00
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Mettler Toledo® SG78-ELK SevenGo Duo PRO pH/conductivity meter (IP67) with InLab® Expert Go ISM and 738-ISM -2.000 to 19.999 pH
$1,957.65
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Mettler Toledo® SG78-FK2 SevenGo Duo PRO pH/conductivity meter (IP67) with IInLab® Expert Go ISM and 738-ISM and Case -2.000 to 19.999 pH
$2,199.45
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Mettler Toledo® SG78-USP/EP  SevenGo Duo PRO pH/conductivity meter (IP67) with Inlab® Pure Pro-ISM Inlab® 742-ISM and Case -2.000 to 19.999 pH
$2,125.05
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SevenGo Duo Kits Instrument only Electrode kit with InLab® Expert Pro-ISM and InLab®738-ISM (both IP67, 1.8 m cable) Field kit with InLab® Expert Pro-ISM, InLab®738-ISM (both IP67, 2 m cable) and uGo™ Instrument only Electrode kit with InLab® Expert Pro-ISM and InLab®738-ISM (both IP67, 1.8 m cable) Field kit with InLab®Expert Pro-ISM, InLab®738-ISM (both IP67, 1.8m cable) and uGo Like SG78-ELK but with different sensors: Inlab® Pure Pro-ISM, 2m ISM-electrode cable and Inlab® 742-ISM
pH measuring range 0 – 14 0 – 14 0 – 14 -2.000 to 19.999 -2.000 to 19.999 -2.000 to 19.999 -2.000 to 19.999
pH resolution 0.01 0.01 0.01 0.001 0.001 0.001 0.001
pH accuracy 0.01 ± 0.01 ± 0.01 ± ±0.002 ±0.002 ±0.002 ±0.002
Temperature Range -5 °C – 105 °C -5 °C – 105 °C -5 °C – 105 °C -5.0 to 130.0 °C (ATC)
-30.0 to 130.0 °C (MTC)
-5.0 to 130.0 °C (ATC)
-30.0 to 130.0 °C (MTC)
-5.0 to 130.0 °C (ATC)
-30.0 to 130.0 °C (MTC)
-5.0 to 130.0 °C (ATC)
-30.0 to 130.0 °C (MTC)
Temperature Resolution 0.1 °C 0.1 °C 0.1 °C 0.1 °C 0.1 °C 0.1 °C 0.1 °C
Temperature accuracy ±0.5 °C ±0.5 °C ±0.5 °C ±0.2 °C ±0.2 °C ±0.2 °C ±0.2 °C
mV Measuring range -1999 to 1999 -1999 to 1999 -1999 to 1999 -1999 to 1999 -1999 to 1999 -1999 to 1999 -1999 to 1999
mV resolution 1 1 1 0.1 0.1 0.1 0.1
mV accuracy 1 ± 1 ± 1 ± ±0.1 ±0.1 ±0.1 ±0.1
Conductivity measuring range 0.1 µS/cm – 500 mS/cm 0.1 µS/cm – 500 mS/cm 0.1 µS/cm – 500 mS/cm 0.01 µS/cm to 1000 mS/cm 0.01 µS/cm to 1000 mS/cm 0.01 µS/cm to 1000 mS/cm 0.01 µS/cm to 1000 mS/cm
Conductivity accuracy (±) 0.01 to 1 0.01 to 1 0.01 to 1 0.01 0.01 0.01 0.01
Conductivity accuracy ±0.5% ±0.5% ±0.5% ±0.5% ±0.5% ±0.5% ±0.5%
TDS Measuring range 0.01 mg/L to 300 g/L 0.01 mg/L to 300 g/L 0.01 mg/L to 300 g/L 0.01 mg/L to 600 g/L 0.01 mg/L to 600 g/L 0.01 mg/L to 600 g/L 0.01 mg/L to 600 g/L
TDS Resolution 0.01 to 1 0.01 to 1 0.01 to 1 0.01 to 1 0.01 to 1 0.01 to 1 0.01 to 1
TDS accuracy ±0.5 °C ±0.5 °C ±0.5 °C ±0.5 °C ±0.5 °C ±0.5 °C ±0.5 °C
Spec. resistance 0.00 to 100.0 M&omega cm 0.00 to 100.0 M&omega cm 0.00 to 100.0 M&omega cm 0.00 to 100.0 M&omega cm 0.00 to 100.0 M&omega cm 0.00 to 100.0 M&omega cm 0.00 to 100.0 M&omega cm
Spec. Resolution 0.01 to 0.1 0.01 to 0.1 0.01 to 0.1 0.01 to 0.1 0.01 to 0.1 0.01 to 0.1 0.01 to 0.1
Spec. accuracy ±0.5 °C ±0.5 °C ±0.5 °C ±0.5 °C ±0.5 °C ±0.5 °C ±0.5 °C
Salinity Measuring range 0.00 to 80.0 ppt 0.00 to 80.0 ppt 0.00 to 80.0 ppt 0.00 to 80.0 ppt 0.00 to 80.0 ppt 0.00 to 80.0 ppt 0.00 to 80.0 ppt
Salinity Resolution 0.01 to 0.1 0.01 to 0.1 0.01 to 0.1 0.01 to 0.1 0.01 to 0.1 0.01 to 0.1 0.01 to 0.1
Salinity accuracy ±0.5 °C ±0.5 °C ±0.5 °C ±0.5 °C ±0.5 °C ±0.5 °C ±0.5 °C
pH sensor inputs BNC; RCA/cinch (both IP67) BNC; RCA/cinch (both IP67)
Conductivity sensor input LTW 7-pin (IP67) LTW 7-pin (IP67)
Outputs - IR to printer or PC via RS232 or USB
Power supply 4 1.5 V AA batteries or 1.3 V NiMH accumulators 4 1.5 V AA batteries or 1.3 V NiMH accumulators
Operating conditions 0 to 40 °C, 5 to 85% rel. humidity (non-cond.) 0 to 40 °C, 5 to 85% rel. humidity (non-cond.)
Size/weight 220 x 90 x 45 mm/357 g (without batteries) 220 x 90 x 45 mm/325 g (without batteries)

Mettler Toledo® SevenGo Duo Pro

Model SG68-B
51302610
SG68-ELK
51302611
SG68-FK2
51302612
SG98-B
51302661
SG98-ELK
51302662
SG98-FK2
51302663
SG98-FK5
51302664
Price Mettler Toledo® SG68-B SevenGo Duo PRO pH/conductivity meter (IP67) -2.000 to 19.999 pH
$1,692.60
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Mettler Toledo® SG68-ELK SevenGo Duo PRO pH/conductivity meter (IP67) with IInLab® Expert Go ISM and 605-ISM -2.000 to 19.999 pH
$2,046.00
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Mettler Toledo® SG68-FK2 SevenGo Duo PRO pH/conductivity meter (IP67) with IInLab® Expert Go ISM and 605-ISM with Case -2.000 to 19.999 pH
$2,199.45
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Mettler Toledo® SG98-B SevenGo Duo PRO pH/ion/RDO meter (IP67) -2.000 to 19.999
$1,694.07
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Mettler Toledo® SG98-ELK SevenGo Duo PRO pH/ion/RDO meter (IP67) with InLab® Expert Go ISM and InLab® OptiOx -2.000 to 19.999
$2,255.25
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Mettler Toledo® SG98-FK2 SevenGo Duo PRO pH/ion/RDO meter (IP67) with InLab® Expert Go ISM and InLab® OptiOx and Case -2.000 to 19.999
$2,376.15
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Mettler Toledo® SG98-FK2 SevenGo Duo PRO pH/ion/RDO meter (IP67) with InLab® Expert Go ISM and InLab® OptiOx and Case -2.000 to 19.999
$2,478.45
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SevenGo Duo Kits Instrument only Electrode kit with InLab® Expert Pro-ISM and InLab®605-ISM (both IP67, 1.8m cable) Field kit with InLab® Expert Pro-ISM, InLab®605-ISM (both IP67, 1.8m cable) and uGo™ Instrument only Electrode kit with InLab® Expert Pro-ISM and InLab® OptiOx (both IP67, 1.8 m cable) Field kit* with InLab® Expert Pro-ISM, InLab® OptiOx (both IP67, 1.8 m cable) and uGo™ Field kit* with InLab® Expert Pro-ISM-5m, InLab® OptiOx-5m (both IP67, 5 m cable) and uGo™
pH measuring range -2.000 to 19.999 -2.000 to 19.999 -2.000 to 19.999 -2.000 to 19.999 -2.000 to 19.999 -2.000 to 19.999 -2.000 to 19.999
pH resolution 0.001 0.001 0.001 0.001 0.001 0.001 0.001
pH accuracy ±0.002 ±0.002 ±0.002 ±0.002 ±0.002 ±0.002 ±0.002
Temperature Range -5.0 to 130.0 °C (ATC)
-30.0 to 130.0 °C (MTC
-5.0 to 130.0 °C (ATC)
-30.0 to 130.0 °C (MTC
-5.0 to 130.0 °C (ATC)
-30.0 to 130.0 °C (MTC
-5.0 to 130.0 °C (ATC)
-30.0 to 130.0 °C (MTC)
-5.0 to 130.0 °C (ATC)
-30.0 to 130.0 °C (MTC)
-5.0 to 130.0 °C (ATC)
-30.0 to 130.0 °C (MTC)
-5.0 to 130.0 °C (ATC)
-30.0 to 130.0 °C (MTC)
Temperature Resolution 0.1 °C 0.1 °C 0.1 °C 0.1 °C 0.1 °C 0.1 °C 0.1 °C
Temperature accuracy ±0.2 °C ±0.2 °C ±0.2 °C ±0.2 °C ±0.2 °C ±0.2 °C ±0.2 °C
mV Measuring range -1999 to 1999 -1999 to 1999 -1999 to 1999 -1999 to 1999 -1999 to 1999 -1999 to 1999 -1999 to 1999
mV resolution 0.1 0.1 0.1 0.1 0.1 0.1 0.1
mV accuracy ±0.1 ±0.1 ±0.1 ±0.1 ±0.1 ±0.1 ±0.1
Ions (units) mg/L, mmd/ L, mol/L 0.000 to 999.9%
0.000 to 9999 ppm
1.00E-9 to 9.99E+9
0.000 to 999.9%
0.000 to 9999 ppm
1.00E-9 to 9.99E+9
0.000 to 999.9%
0.000 to 9999 ppm
1.00E-9 to 9.99E+9
0.000 to 999.9%
0.000 to 9999 ppm
1.00E to 9…9.99E+9
0.000 to 999.9%
0.000 to 9999 ppm
1.00E to 9…9.99E+9
0.000 to 999.9%
0.000 to 9999 ppm
1.00E to 9…9.99E+9
0.000 to 999.9%
0.000 to 9999 ppm
1.00E to 9…9.99E+9
Ions Accuracy ±0.5% ±0.5% ±0.5% ±0.5% ±0.5% ±0.5% ±0.5%
Saturation Measuring range 0.0 to 600% 0.0 to 600% 0.0 to 600% 0 to 500 % 0 to 500 % 0 to 500 % 0 to 500 %
Saturation Resolution 0.1 to 1 0.1 to 1 0.1 to 1 0.1 % 0.1 % 0.1 % 0.1 %
Saturation accuracy ±0.5% ±0.5% ±0.5% ±0.5% ±0.5% ±0.5% ±0.5%
Oxygen (mg/L, ppm) 0.00 to 99.00 0.00 to 99.00 0.00 to 99.00 0.00 to 50.00 0.00 to 50.00 0.00 to 50.00 0.00 to 50.00
Oxygen Resolution 0.01 0.01 0.01 0.01 0.01 0.01 0.01
Oxygen accuracy ±0.5% max. 0.03 ±0.5% max. 0.03 ±0.5% max. 0.03 ± 0.1 mg/L from 0 to 8
± 0.2 mg/L from 8 to 20
± 10% from 20 to 50
± 0.1 mg/L from 0 to 8
± 0.2 mg/L from 8 to 20
± 10% from 20 to 50
± 0.1 mg/L from 0 to 8
± 0.2 mg/L from 8 to 20
± 10% from 20 to 50
± 0.1 mg/L from 0 to 8
± 0.2 mg/L from 8 to 20
± 10% from 20 to 50
Pressure Measuring range 500 to 1100 mbar 500 to 1100 mbar 500 to 1100 mbar 500 to 1100 mbar 500 to 1100 mbar 500 to 1100 mbar 500 to 1100 mbar
Pressure Resolution 1 1 1 1 1 1 1
Pressure accuracy ±1 ±1 ±1 ±1 ±1 ±1 ±1
Sensor input pH: BNC; RCA/cinch (both IP67) DO: Mini-LTW (IP67)
Conductivity sensor input BNC; RCA/cinch (both IP67)
Outputs IR to printer or PC via RS232 or USB IR to printer or PC via RS232 or USB
Power supply 4 1.5 V AA batteries or 1.3 V NiMH accumulators 4 1.5 V AA batteries or 1.3 V NiMH accumulators
Operating conditions 0 to 40 °C, 5 to 85% rel. humidity (non-cond.) 0 to 40 °C, 5 to 85% rel. humidity (non-cond.)
Size/weight 220 x 90 x 45 mm/368 g (without batteries) 220 x 90 x 45 mm/325 g (without batteries)
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