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12.88 mS/cm conductivity standard.
APERA INSTRUMENTS / CONDUCTIVITY STANDARD / AI1131-S / AI1131 / AI1131-L
Apera’s 12.88 mS/cm standard (12,880 µS/cm) calibrates conductivity meters at the high end of the range, for brackish water, process water, nutrient concentrates and other high-conductivity samples. Apera standardizes it against NIST certified references at 25°C (77°F).
It is the high point in Apera’s pH/conductivity calibration kits (AI1105 and AI1112), paired with 1413 µS/cm. Calibrate with the standard closest to your samples, or add it as a second point above 1413 µS/cm. Choose a 4 oz, 8 oz or 16 oz bottle from the size menu.
Calibrate with the standard closest to the conductivity of your samples. Each card opens that standard, in 4, 8 or 16 oz.
AI1132-S / AI1132 / AI1132-L
Low range
±1 µS/cm. For low-conductivity water and the bottom of the range.
AI1130-S / AI1130 / AI1130-L
General range
The most common conductivity calibration point.
AI1131-S / AI1131 / AI1131-L
High range
For brackish water, nutrient concentrates and other high-conductivity samples.
AI1134-S / AI1134 / AI1134-L
Very high range
±0.4 mS/cm. For brines, seawater concentrates and the top of the range.
A conductivity meter is most accurate near the point it was calibrated. Use 12.88 mS/cm when your samples sit in this part of the range, and check the reading against a second standard if your samples span a wide range.
Rinse the probe with deionized water, then with a little of the standard, before calibrating in fresh standard. Pour what you need into a clean cup, close the bottle straight away, and never pour used standard back.
All three sizes carry the same 12.88 mS/cm standard. Apera gives conductivity solutions a one-year shelf life, with the expiration date on the bottle. Store at room temperature away from direct sunlight and keep the cap tight.
Conductivity rises with temperature. Calibrate with automatic temperature compensation on, or read the reference value for your temperature from the bottle label.
Apera provides a certificate of analysis by request, and an MSDS is available.
For pH and conductivity together, see the AI1105 four-solution kit or AI1112 six-solution kit. Clean fouled probes with Apera electrode cleaning solution.
12.88 mS/cm (12,880 µS/cm) at 25°C (77°F).
Standardized against NIST certified references at 25°C.
1 year; expiration date printed on each bottle. Store at room temperature, away from direct sunlight, with the cap tight.
Choose the size you will use before the opened-bottle limit or expiry date. The solution is identical across 4 oz, 8 oz and 16 oz.
Yes, with any brand of conductivity meter, tester or electrode that supports calibration at 12.88 mS/cm.
Check the size and catalog number (AI1131-S / AI1131 / AI1131-L) against your meter, electrode and calibration routine, then return to the live price and ordering controls.
Shelf life: 1 year; expiration date printed on each bottle.
Store at room temperature, away from direct sunlight, with the cap tightly closed.
Apera prints the expiration date and temperature reference chart on each bottle. A safety data sheet and certificate of analysis are available from Apera on request; contact Blue Tiger Scientific with your order number and lot.
email us here: info@bluetigerscientific.com or live chat
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