
3100
Laboratory Conductivity Instrument
The YSI 3100 provides accuracy and reliability in measuring conductivity, salinity and temperature.
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Want to return a product for service? Here you’ll find authorized service centers and instructions on how to send in your YSI 3100.
The instrument uses forced-current measurement technology, and other features including direct-reading digital display, adjustable temperature coefficient, reference temperature, and automatic temperature compensation.
The YSI 3100 uses a line of NIST-traceable conductivity cells with built-in temperature sensors, assuring the most accurate measurements.
Ensure even more accurate readings by using YSI conductivity solutions and the 3166 Resistor set as part of your QA/QC procedures.
Features
YSI 3100 Instrument General Specifications
| Calibration | single point |
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| Cell Connector | 7-pin Mini Din | |
| Cell constant, cm-1 | 0.01, 0.1, 1, 10 cm-1 | |
| Certifications | UL, CSA, CE | |
| Dimensions | Size | 9 by 9.5 by 4.4 in (22.9 by 24.1 by 11.2 cm) |
| Weight | 2.6 lbs (1.1 kg) |
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| Display | LCD | |
| Operating Environment | 95% relative humidity, non-condensing | |
| Platinizing Capability | Included | |
| Power | AC, 115V, 220V | |
| Temperature Compensation |
Method | Linear |
| Reference temperature |
15 - 25°C | |
| Temperature Coefficient | 0 - 4%/°C |
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| Water Resistance |
The Model 5000 and 5100 are designed exclusively for indoor use and are NOT waterproof. | |
| Warranty |
2-year instrument |
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YSI 3100 Specifications (Instrument Only)
| Conductance | |||
| Range | Accuracy | Resolution | Frequency |
| 0 to 49.99 µS/cm1 | ±0.50% full scale | 0.01 µS/cm | 70 Hz |
| 0 to 499.9 µS/cm |
±0.50% full scale | 0.1 µS/cm | 70 Hz |
| 0 to 4999 µS/cm2 | ±0.50% full scale | 1 µS/cm | 240 Hz |
| 0 to 49.99 mS/cm3 |
±0.50% full scale | 0.01 mS/cm | 1562 Hz |
| 0 to 499.9 mS/cm4 |
±0.50% full scale | 0.1 mS/cm |
1562 Hz |
| 1 Requires a cell constant of K=0.01, K=0.1 or K=1. 2 Requires a cell constant of K=0.1, K=1 or K=10. 3 Requires a cell constant of K=1 or K=10. 4 Requires a cell constant of K=10. |
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| Range | Accuracy | Resolution | |
| Salinity | 0-80 ppt (NaCl) | 2% or ±0.1 ppt | 0.1 ppt |
| Temperature |
-5 to +95°C |
±0.1°C + 1 lsd | 0.1°C |
Conductivity Cell General Measurement Ranges

Conductivity Cell General Specifications
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3200 Series Cells with built-in temperature sensors |
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| Model | cgs Cell Type |
S.I. Cell Constant |
Cell Constant | Material | Overall Length (mm) | Max O.D. (mm) | Chamber I.D. (mm) | Chamber Depth (mm) | Volume | |
| A | 3252 | dip | 1.0/cm | 100/m | ABS plastic | 146 |
13 |
10 |
20 |
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| B | 3253 | dip, micro |
1.0/cm | 100/m | Pyrex 7740 | 178 |
13 |
10 |
51 |
|
| C |
3254 | fill | 1.0/cm | 100/m | Pyrex 7740 | 135 |
19 |
11 |
83 |
5 mL |
| D | 3255 | flow | 0.1/cm | 10/m | Pyrex 7740 | 146 |
25 |
21 |
76 |
30 mL |
| E | 3256 | dip | 0.1/cm | 10/m | Pyrex 7740 | 159 |
25 |
21 |
52 |
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| Model | cgs Cell Type | S.I. Cell Constant | Cell Constant | Material | Overall Length (mm) |
Max O.D. (mm) |
Chamber I.D. (mm) | Chamber Depth (mm) | Volume | |
| F |
3401 |
dip | 1.0/cm | 100/m | Pyrex 7740 | 191 |
25 | 21 | 76 | |
| G |
3402 |
dip | 0.1/cm | 10/m | Pyrex 7740 | 159 |
25 | 21 | 52 | |
| H |
3403 |
dip | 1.0/cm | 100/m | Pyrex 7740 | 178 | 13 | 10 | 51 | |
| I |
3417 |
dip | 1.0/cm | 100/m | ABS plastic | 146 | 13 | 10 | 20 | |
| I | 3418 | dip | 0.1/cm | 10/m | ABS plastic | 159 | 13 | 10 | 30 | |
| J |
3440 |
dip | 10/cm | 1000/m | Pyrex 7740 | 203 | 13 | 2 | 86 | |
| *Requires a YSI 3232 Cell Adaptor for use with YSI 3100 and 3200 Conductivity Instruments. For automatic temperature compensation, use a YSI 3220 on the 3200 | ||||||||||
3100 Conductivity Salinity Temperature Instrument Operations Manual
YSI 3100/3200 Conductivity System Specifications
Water Quality Sampling for Field and Laboratory
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170 Electrode StandThe 170 electrode stand is ideal for a lab setting to hold the sensors during measurements. |
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3200 Series Conductivity CellsYSI conductivity cells with built-in temperature sensors. |
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Conductivity Calibration SolutionsNIST-traceable conductivity solutions to calibrate both field instruments and lab instruments and cells together for maximum |
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