Dew Point/Wet Bulb Psychrometers NEW RH390/RH490 HD500/HD550 SDL500 Hygro- Precision Hygro- Psychrometers Thermometer/ Thermometer + 30:1 InfraRed Datalogger Psychrometers Thermometer Date/time stamps and stores readings on an SD Highest 2% RH accuracy Combination Humidity ® card in Excel format for with Fast 30 second Meter, Type K thermometer, easy transfer to a PC Response Time and InfraRed Thermometer • Humidity, Temperature, Dew • Dual backlit display • Built-in IR Thermometer Point & Wet Bulb functions for non-contact surface • Simultaneous display of: • Selectable data sampling temperature measurements - Humidity/Temperature rate: 1 to 3600 seconds - Humidity/Dew Point • Type K Thermometer • Manually store/recall - Humidity/Wet Bulb for contact temperature up to 99 readings measurement • Fast 30 second response time • Large backlit dual LCD • Highest 2% RH accuracy • Slim design with rubberized • Record/Recall MIN, sides for better grip and • Large triple LCD backlit display MAX readings for one hand operation • USB port includes PC software • Data Hold plus Auto power • Model RH490 measures • Auto power Off off with disable function Grains Per Pound (grams per • Model HD550 measures • Built-in PC interface kilogram) to 1120GPP (160g/kg) Grains Per Pound (grams per • Includes 6 x AA batteries, SD • Complete with carrying kilogram) to 999GPP (160g/kg) card, case and Humidity probe; case and 9V battery • Complete with general purpose Optional AC Adaptor 153117 Type K bead wire probe, PC or UA100-240, also see p. 40, software,USB cable, built-in 41, and 74 for optional Type K stand, case, & 9V battery and J Thermocouple probes � � � RH390 � | RH490 � � HD500 � | HD550 � SDL500 � SPECIFICATIONS Capacitance Capacitance Capacitance Sensor Type -22 to 199°F (-30 to 100°C) -90.4 to 140°F (-68 to 60°C) -13.5 to 120.1°F (-25.3 to 48.9°C) Dew Point 32 to 176°F (0 to 80°C) -6.88 to 140°F (-21.6 to 60°C) -6.9 to 122°F (-21.6 to 50°C) Wet Bulb 0 to 100%RH (±2%RH) 0 to 100% (±2%RH) 5% to 95% (±3%RH) Humidity (Basic Accuracy) � � � No | 0 to 1120 GPP (grains per pound); � No | 0 to 999 GPP (grains per pound); — Mixing Ratio 0 to 160 g/kg (grams per kilogram) 0 to 160 g/kg (grams per kilogram) -22 to 199°F/-30 to 100°C (±1.8°F/1°C) -14 to 140°F/-10 to 60°C (±4°F/±2°C) 32 to 122°F/0 to 50°C (±1.8°F/±1°C) Internal Temperature (Basic Accuracy) — Type K: -148 to 2501°F/-100 to 1372°C Type K: -148 to 2372°F /-100 to 1300°C External Temperature (Basic Accuracy) (±3%) Type J: -148 to 2192°F/-100 to 1200°C ±(0.4% + 1.8°F/1°C) — -58 to 932°F/-50 to 500°C — IR Temperature (Basic Accuracy) (±2% or ±4°F/±2°C) — 0.95 fi xed — Emissivity — 30:1 — Field of View — Yes Optional 407001 software (see p. 106) PC Interface — — 20M readings using 2G SD memory card Memory/Datalogging Yes Yes Yes CE approved 7.8x1.7x1.3" (200x45x33mm)/7oz (200g) 10x2.9x2" (255x75x50mm)/12.2oz (350g) 7.2x2.9x1.9" (182X73X48mm)/23oz (655g) Dimensions/Weight 1 year 3 years 3 years Warranty For the name of your local distributor, visit www.extech.com or call 1-877-894-7440 81 81