Monitor up to 12 environmental parameters with one tiny instrument. Light weight, tiny size with simple, one-hand, operation. All units (except LUSP-82AC) read air speed in addition to the wide selection of environmental parameters listed below. Will sense airflow as low as 0.4 m/s with an accuracy of ±3% (4% >20m/s). Replaceable snap-in anemometer vane. All models feature min/max, hold, a backlight and come complete with a wrist strap, carry pouch, and button cell battery providing at least 40 hours of continuous use. Model 850027 accurately measures liquid and solid temperatures using the optional Pt 1000 penetration probe.