Conductivity Standard Solution 1413µS intended for conductivity probe calibration. REED R1430 Offers This Conductivity Standard Solution 1413µS is manufactured using solutions which are traceable to reference standards provided by the National Institute of Standards and Technology (NIST). Features 1413µS Conductivity Value (@20°C) 16.9 fl oz (500ml) bottle with childproof cap ±20µS or 1.0% accuracy Certificate of Analysis available upon request Included REED R1430 Conductivity Standard Solution, 1413µs