These thermometers provide precise measurements when accuracy is a must, delivering dependable results every time! each AO-20250-93 is packed with distinctive features for use in a wide array of applications. Robust and reliable constructed to protects against knocks and jars. These thermometers produce a high degree of accuracy, with a rapid response time, and exceptional battery life of up to 3000 hours. Digi-Sense thermometers come pre-calibrated, saving you hundreds of dollars and extra waiting time to calibrate separately. Perfect for the lab to production floor reliable measurements, guaranteed! pre-calibrated to nist-traceable standards. Electronic offset function allows compensation of probe errors.