Oakton WD-08491-02 General-Purpose Flexible Thermistor Probe, 10' Lead, 5/16" Probe Tip, -40 to 100&deg;C Probes are accurate to +/- 0.2F from 32 to 150F (+/- 0.1C from 0 to 70C). Electrically isolated probes include a nondetachable 10-ft lead with 1/4" phono plug (except as noted). Feature includes excellent accuracy over the biological temperature range Use with any meter that accepts YSI 400 Series probes. General-purpose probe, immersible for short-term deep-water and sub soil readings 5/16" probe tip with vinyl sheath and tip, 10-ft nondetachable lead with 1/4" phono plug.