APERA INSTRUMENTS / EC950 / AI5622

Conductivity at the bench.
A repeatable routine.

The EC950 pairs a dedicated conductivity meter with the 2401T-F glass EC/temperature probe and 606 TestBench. Read conductivity, derived TDS or salinity with temperature alongside the result. The organized bench, magnetic stirring and 200-set logging support routine sample comparisons without adding pH hardware you do not need.

Choose EC950 for general aqueous conductivity work up to the supplied probe’s 200 mS/cm rating. Specialized low-conductivity samples still need an appropriate cell and method.

One probe, two connections

The supplied 2401T-F uses a lead-free glass body, platinum-black cell and K=1.0 cell constant. Its BNC carries conductivity; RCA carries the integrated NTC 30 kΩ temperature signal. There is no separate MP500 temperature probe to position.

A bench that supports the method

The 606 holds the electrode and organizes solutions around its magnetic stirrer. Meter controls adjust and recall stirring speed. The bench does not heat samples or regulate temperature; consistent mixing remains part of your operating procedure.

Dedicated EC without extra modes

EC950 conductivity accuracy is ±1% of full scale ±1 digit, not percent of reading. The meter also calculates TDS and salinity from conductivity. It does not measure pH, ORP or resistivity, and conversions do not identify individual dissolved substances.

Know what this configuration supplies.

Routine water comparisons

Compare compatible process, rinse or prepared water samples using the same sampling conditions. Choose a specialized cell for very low conductivity rather than assuming every water sample suits K=1.

Aqueous solution preparation

Track conductivity while preparing suitable salt solutions. Set the temperature coefficient and TDS factor to fit the formulation; default settings are not universal composition models.

Teaching and shared laboratories

Keep standards, probe and sample together for a visible calibration-to-measurement workflow. Save selected results or timed readings, then transfer records before clearing meter memory.

Clear the cell.
Control the comparison.

Connect the 2401T-F BNC to conductivity and RCA to its temperature input. Remove the storage cap and rinse with distilled or deionized water. Confirm K=1.0; follow the probe manual’s two- to three-point calibration for a new electrode. Keep connectors dry.

The Standard series recognizes 84 µS/cm, 1413 µS/cm, 12.88 mS/cm and 111.8 mS/cm for one to four points. Only the first three are supplied. Use clean portions and rinse between solutions. Select reference temperature, compensation coefficient and TDS factor for the method.

Submerge the sensing cavity without striking the vessel. Gently stir to release trapped bubbles, then allow the reading to stabilize. Stirring changes can affect readings, so keep mixing conditions consistent and avoid a vortex. Log sample temperature with the result; temperature compensation is not temperature control.

Water in the cap.
Gentle handling at the cell.

Rinse before and after measurements. Remove excess water without rubbing or brushing the platinum-black surface. A sample rinse can limit dilution. Keep the glass cell clear of the stir bead and vessel wall.

Return the 2401T-F to its cap containing distilled or deionized water. Replace dirty water and avoid prolonged dry storage. This is not pH-reference refill solution: do not substitute KCl or apply LabSen storage instructions.

For persistent deposits, follow the electrode manual rather than improvising aggressive cleaners. Check a suitable standard after cleaning and recalibrate when necessary. Keep connectors dry and protect the glass during movement.

A stable reading is the start of the record.

Use the physical meter controls for measurement and calibration, then record or save a stable result. A held display and a stored record are different functions. Screen values in photographs are illustrative, not measurements of your sample.

Use calibration solutions and settings appropriate to the parameter and fitted electrode. Temperature compensation does not make different sample temperatures, preparation methods or chemistry equivalent. Follow the model-specific meter and electrode instructions before extending the method to a new sample.

200 stored sets.
A USB route to the PC.

EC950 supports manual and timed logging, a date/time clock and review of the last calibration. Set the clock before collecting records. The documented capacity is 200 sets; plan downloads and retention before the memory fills.

The documented computer route is USB with legacy PC-Link 950. A newer browser utility is also linked for this product, but its implementation identifies the 9500 series. Confirm EC950 hardware compatibility before relying on that newer route; do not assume identical browser support.

USB data handling is not Bluetooth or ZenTest. Keep exported records under your own backup and review procedure. Stored readings and calibration information support documentation, but are not immutable records, electronic signatures or a validated compliance system.