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Jenway 3540 Bench Combined pH and Conductivity Meter, supplied with glass combination pH electrode (924 005), glass conductivity probe (K= 1 027 013), electrode stand and holder, ATC probe (027 500), BNC shorting plug, pH buffers and UK power supply
Technical Specification
Parameter | 3540 |
pH range | –2.000 to 20.000 |
pH resolution | 0.001/0.01/0.1 |
pH accuracy | ±0.003 |
Auto. buffer recognition | Jenway, NIST, DIN and JIS |
mV range | ±1999.9mV |
mV resolution | 0.1mV |
mV accuracy | ±0.2mV |
Conductivity ranges | Auto–selected from 0.01µS to 1.999S |
Conductivity resolution | 0.01µS to 1mS |
Conductivity accuracy | ±0.5% ±2 digits |
Cell constant | 0.010 to 19.999 |
Automatic standard recognition | 10µS, 84µS, 1413µS, 12.88mS (with manual override) |
TDS range | 6 auto–selected from 0 to 1999g/l |
TDS resolution | 0.01mg/l to 1g/l |
TDS accuracy | ±0.5% ±2 digits |
EC ratio (TDS) | 0.50 to 0.80 |
Temperature range | –10 to 105°C |
Temperature resolution | 0.1°C |
Temperature accuracy | ±0.5°C |
ATC and manual | 0 to 100°C |
Temperature coefficient | 0.00 to 4.00%/°C |
Reference temperature | 18, 20, 25°C |
Additional modes | Salinity and resistivity |
GLP | Calibration reminder interval, operator and sample ID and security coded setup |
Outputs | Analogue, RS232 and IrDA interface |
Connector | BNC (pH) and 7–pin DIN (conductivity) |
Power | 9V AC ±10% @ 50/60Hz |
Size (l x w x d) | 210 x 250 x 55mm |
Weight | 850g |

3540 Bench Combined Conductivity/pH Meter
• Simultaneous display of pH and conductivity
• 2 independent channels to prevent interference between probes
• Additional modes for resistivity, salinity, TDS and mV
• Data logger with auto save/print options
• Storage of up to 500 readings (250 for each mode)
The 3540 is ideal for use in all laboratories where pH and conductivity analyses are required. The setup menu gives quick and easy access to the whole range of instrument, pH and conductivity measurement options. Calibration of both channels is automatic, with the option to select 1, 2 or 3 calibration points. The pH channel can also display mV values if required.
• Simultaneous display of pH and conductivity
• 2 independent channels to prevent interference between probes
• Additional modes for resistivity, salinity, TDS and mV
• Data logger with auto save/print options
• Storage of up to 500 readings (250 for each mode)
The 3540 is ideal for use in all laboratories where pH and conductivity analyses are required. The setup menu gives quick and easy access to the whole range of instrument, pH and conductivity measurement options. Calibration of both channels is automatic, with the option to select 1, 2 or 3 calibration points. The pH channel can also display mV values if required.
Part Code | Description | K Value | Unit |
027 298 | Epoxy bodied conductivity cell | K= 1 | 470 |
027 801 | Epoxy bodied conductivity cell | K= 0.1 | 470 |
027 802 | Epoxy bodied conductivity cell | K= 10 | 470 |
027 013 | Glass bodied | K= 1 | Bench |
027 113 | Epoxy bodied | K= 0.1 | Bench |
027 177 | Glass bodied,flow-through | K= 1 | Bench |
027 211 | Glass free/epoxy | K= 0.1 | Bench |
027 212 | Glass free/epoxy | K= 1 | Bench |
027 213 | Glass free/epoxy | K= 10 | Bench |
027 900 | Ultra-pure water conductivity probe | K< 0.1 | Bench |
027 502 | PTFE-coated ATC probe for use with aggressive/corrosive samples | N/A | 3540 |
Part Code | Description |
025 156 | 12.88mS conductivity standard (500ml) |
025 138 | 1413µS conductivity standard (500ml) |
025 164 | 84µS conductivity standard (500ml) |
025 139 | 10µS conductivity standard (500ml) |
025 165 | 1382ppm TDS calibration standard (500ml) |
025 157 | 200mV redox standard (500ml) |
025 158 | 300mV standard (500ml) |