PH818 Replaceable ATC pH Probe

This is the official replacement pH probe for the PH818 portable pH meter, incorporating Automatic Temperature Compensation (ATC) to deliver accurate, temperature-corrected pH results with no manual adjustments. Certified IP65, it is fully protected against dust and low-pressure water jets — ideal for humid aquarium rooms, greenhouse hydroponics, and outdoor water sampling. Its pocket-portable form includes a large, easy-to-read LCD and a manually activated backlight for consistent visibility in dim tanks, shaded ponds, or twilight field conditions. The insert-type design enables instant, secure fitting into the PH818 — restoring full functionality in seconds and avoiding costly instrument downtime. Simultaneously measures pH and temperature, and uses data hold to freeze and retain values for confirmation or documentation. Basic parameters: exclusive fit for PH818; no internal battery or microcontroller; relies entirely on PH818 for power and processing; ATC circuit embedded in probe housing; IP65 validated for continuous wet-environment exposure; weight and balance maintained for comfortable one-handed use. Core functionality: ATC delivers real-time correction across typical UK ambient and aquatic temperature ranges; data hold stabilises output for photographic logging or manual transcription; IP65 rating ensures structural integrity during repeated cleaning and transport. Use scenarios: trusted by UK aquarium clubs for group pH validation events; used by small-scale hydroponic growers to verify pH prior to weekly nutrient changes; deployed by local wildlife trusts for seasonal pond health assessments across rural and urban catchments.