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Precision Psychrometer / Hygro-Therm

Highest 2% RH accuracy

Psychrometer
  • Fast - 30 second RH response time
  • Water vapor in GPP (g/kg) - RH490 Hygro-Thermometer only
  • Dual backlit display
  • Simultaneous display of:
    Humidity [or GPP (g/kg) for RH490] plus Temperature
    Humidity [or GPP (g/kg) for RH490] plus Dew Point
    Humidity [or GPP (g/kg) for RH490] plus Wet Bulb
  • Data Hold and Min/Max functions
  • Auto power off with disable and low battery indicator
  • Complete with carrying case and 9V battery
Hygro-Thermometer

Technical Data
Specifications RH390 Psychrometer RH490 Hygro-Thermometer
Humidity: 0 to 100%RH
Temperature (Internal): -4 to 199°F (-20 to 100°C) -22 to 199°F (-30 to 100°C)
Basic Accuracy: ±2%RH, ±1.8°F/1°C
Max. Resolution: 0.1%RH, 0.1°F/C
Dewpoint: -22 to 199°F (-30 to 100°C)
Wet Bulb: 32 to 176°F (0 to 80°C)
Absolute Humidity:   0 to 1120GPP (0 to 160g/kg)

Available Items - Literature
Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Item Number Item Prices
WE-346019 RH390 Precision Psychrometer $189.99
WE-346019/C RH390 Precision Psychrometer with NIST certificate 294.99
WE-346119 RH490 Precision Hygro-Thermometer 339.99


Heat Stress WBGT Meter

Wet Bulb Globe Temperature (WBGT) considers the effects of temperature, humidity and direct or radiant sunlight

WBGT Meter
  • Heat Stress Index measures how hot it feels when humidity is combined with temperature, air movement and radiant heat
  • Black Globe Temperature (TG) monitors the effects of direct solar radiation on an exposed surface
  • Air Temperature (TA) plus Relative Humidity (RH)
  • Selectable units of °F and °C
  • In/Out Function displays the WGBT value with or without direct sun exposure
  • Auto Power Off with override
  • Built-in RS-232 interface with optional Windows® compatible software
  • Complete with two AAA batteries

Technical Data
Specifications Range Basic Accuracy
Wet Bulb Glove Temp. (WBGT): 32 to 122°F (0 to 50°C) ±4°F/2°C
Black Globe Temp. (TG): -22 to 1022°F (-30 to 550°C) ±4°F/2°C
Air Temperature (TA): 32 to 122°F (0 to 50°C) ±1.1°F/0.6°C
Humidity: 0 to 100% RH ±3% RH
Dimensions: Meter: 10 x 1.9 x 1.1” (254 x 48.7 x 29.4mm)
Ball: 1.6” dia, 1.4” high (40mm diameter, 35mm high)
Weight: 4.8 oz (136g)

Available Items - Literature
Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Item Number Item Prices
WE-346115 HT30 Heat Stress WBGT Meter $159.99
WE-407752 PC software and cable 49.99
Home    Moist/Air/Temp    How To Order    Top Of Page Paul N. Gardner Company, Inc. • 1.800.762.2478 • Fax 954.946.9309