bluelab Combo Meter User Manual (English)

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Questions and Answers:

Justin SanchezAug 18, 2025

Why are my bluelab Combo Meter Measuring Instruments pH readings inaccurate?

S
Stacey JonesAug 18, 2025
If you're getting inaccurate pH readings on your Bluelab Measuring Instruments, there could be a few reasons. First, the probe might be contaminated, so cleaning the pH probe is recommended. Another reason might be incorrect calibration; ensure your calibration solutions are accurate, and replace them if you're unsure. Also, allow readings to stabilize longer before calibrating.

Aaron WellsAug 20, 2025

How to fix inaccurate nutrient readings on bluelab Combo Meter?

M
Matthew FreemanAug 20, 2025
If the nutrient readings on your Bluelab Measuring Instruments are inaccurate, clean the probe as described in Section 5.0 of this document and wait 5 to 10 minutes for the reading to stabilize.

bluelab Combo Meter Specifications

General

Measures	pH, Conductivity, Temperature
pH Range	0.0 - 14.0 pH
Power Source	2 x AAA batteries
Resolution pH	0.1 pH
Accuracy pH	±0.1 pH
IP Rating	IP67
Temperature Range	0 - 50 °C / 32 - 122 °F
Resolution Temperature	1 °C / 1 °F
Accuracy Temperature	±1 °C (±2 °F)
ATC	Yes
Dimensions	185 mm
Accuracy EC	±0.1 EC

Summary