Extech Instruments HD500, RH390, RH490, SDL500 Catalog Page

85

Dew Point/Wet Bulb Psychrometers

RH390/RH490

Precision Hygro­Thermometer
Psychrometers

Highest 2% RH accuracy
with Fast 30 second
Response Time

• Dual backlit display

• Simultaneous display of:

- Humidity/Temperature

- Humidity/Dew Point

- Humidity/Wet Bulb

• Fast 30 second response time

• Slim design with rubberized
sides for better grip and
for one hand operation

• Model RH490 measures
Grains Per Pound (grams per
kilogram) to 1120GPP (160g/kg)

• Complete with carrying
case and 9V battery

HD500

Psychrometer
+ 30:1 InfraRed
Thermometer

Combination Humidity
meter, Type K thermometer,
and InfraRed Thermometer

• Built-in IR Thermometer
for non-contact surface
temperature measurements

• Type K Thermometer
for contact temperature
measurement

• Highest 2% RH accuracy

• Large triple LCD backlit display

• USB port includes PC software

• Auto power Off

• Complete with general purpose
Type K bead wire probe, PC
software,USB cable, built-in
stand, case, and 9V battery

SDL500 Hygro-

Thermometer/
Datalogger

Date/time stamps and
stores readings on an SD
card in Excel

®

format for

easy transfer to a PC

• Humidity, Temperature, Dew
Point & Wet Bulb functions

• Selectable data sampling
rate: 1 to 3600 seconds

• Manually store/recall
up to 99 readings

• Large backlit dual LCD

• Record/Recall MIN,
MAX readings

• Data Hold plus Auto power
off with disable function

• Includes 6 x AA batteries,
SD card, case and Humidity
probe; Optional Universal AC
Adaptor UA100-240, also see

p. 41 and 70 for optional Type

K and J Thermocouple probes

ÿ RH390 ÿ |þ RH490 ÿ

HD500 ÿ SDL500 ÿ 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)

ÿ No |þ0 to 1120 GPP (grains per pound);

0 to 160 g/kg (grams per kilogram)

— — Mixing Ratio

-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

(±3%)

Type K: -148 to 2372°F /-100 to 1300°C
Type J: -148 to 2192°F/-100 to 1200°C
±(0.4% + 1.8°F/1°C)

External Temperature (Basic Accuracy)

— -58 to 932°F/-50 to 500°C

(±2% or ±4°F/±2°C)

— IR Temperature (Basic Accuracy)

— 0.95 fixed — Emissivity
— 30:1 — Field of View
— Yes — PC Interface
— — Datalogs using 4GB 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

Includes SD

memory card