Velleman DEM900 Temperature humidity meter industrial environmental sensor/monitor

31.5 Hz-8 kHz, -40 ~ 70°C, 575 g <b>Features</b>
- display: Lux, °C, °F, %RH, dB-A, dB-C, dB-low and dB-high, m/s, km/h, ft/min, knots, Mph
- large 4-digit backlit LCD display
- data hold and maximum hold
- auto power off and Low battery indication
- comes with: 1 x 9 V 6F22 (included), temperature and humidity probe, photo detector , anemometer probe, carry case and coloured box

<b>sound level:</b>
- measurement range: 35 dB ~ 130 dB
- accuracy: ± 2.0 dB
- resolution: 0.1 dB
- frequency response: 31.5 Hz ~ 8 kHz
- frequency weighting: dBA

<b>anemometer:</b>
- air velocity range: 0.5 m/s ~ 30.0 m/s
- air velocity accuracy: ±3% ± 0.3 d
- measurement units: m/s, km/h, ft/min, knots, Mph

<b>temperature:</b>
- measurement range: -40 ~ 70°C (-40 ~158°F)
- accuracy: ±2.0 °C /± 3.6 °F
- measurement units: °C/°F

<b>humidity:</b>
- measurement range: 10 ~ 95% RH
- accuracy: ± 5RH %
- power supply: 1 x 9V battery 6F22 (incl.)
- dimensions: 252 x 66 x 33 mm
- weight: 575 g (with probes and battery)