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Digital Psychrometer

External Probe Temperature measurements for differential

Calculates T1-T2 differential (Air Temperature minus External Probe Temperature)

Features:

•

Simultaneous display of %RH, Temperature and

Dew point or Wet Bulb or Probe Temperature

•

Wet bulb measurements without slinging

•

Calculates T1-T2 differential (Air Temperature minus

External Probe Temperature) using optional probe (TP890)

and T2-Dew Point

•

Unique sensor cap design twists to closed

position for protection during storage

•

Switchable °F/°C temperature units with 0.1° resolution

•

Data Hold freezes current reading on display

•

Max/Min readings

•

Auto power off to save battery life

•

RH300 complete with 2 AAA batteries

•

Optional external temperature probe (TP890)

•

Optional kit RH305 includes RH300, temperature probe,

33% and 75% calibration bottles, and carrying case

RH300-CAL Optional

calibration salt bottles

RH305 Digital Psychrometer Kit

includes RH300, 33% and 75%

calibration bottles, temperature

probe, and carrying case.

Unique sensor cap design

Twist to open or close sensor

for storage.

Specifications:

Humidity

Temperature (internal)

Temperature (external)

Dew Point

Wet Bulb

Dimensions

Weight

Range

Max Resolution

10 to 90%RH

0.1%RH

-4 to 122°F (-20 to 50°C)

0.1°

-4 to 158°F (-20 to 70°C)

0.1°

-90.4 to 122°F (-68.0 to 49.9°C)

-6.9 to 122°F (-21.6 to 49.9°C)

7 x 1.9 x 1" (178.5 x 48.4 x 24.7mm)

3.3oz (95g)

Basic Accuracy

±3%RH

±1.8°F or ±1°C

Ordering Information:

RH300

..............Digital Psychrometer

RH300-NIST......RH300

with Calibration Traceable to NIST

RH305

..............Digital Psychrometer Kit

RH305-NIST......RH305

with Calibration Traceable to NIST

RH300-CAL

......33% and 75% RH calibration reference

TP890

..............Optional Thermistor Temperature Probe (for Model RH300)

www.extech.com

Specifications subject to change without notice.

5/8/13 - R1

参数对比

与RH300-NIST相近的元器件有：RH305-NIST、RH300、RH305。描述及对比如下：

型号	RH300-NIST	RH305-NIST	RH300	RH305
描述	Environmental Test Equipment DIGITAL PSYCHROMETER WITH CALIBRATION	Environmental Test Equipment HYGRO PSYCHROMETER KIT WITH CALIBRATION	Environmental Test Equipment DIGITAL PSYCHROMETER	Environmental Test Equipment HYGRO-THERMOMETER PSYCHROMETER KIT
产品种类 Product Category	Environmental Test Equipment	Environmental Test Equipment	Environmental Test Equipment	Environmental Test Equipment
制造商 Manufacturer	Extech	Extech	Extech	Extech
RoHS	Details	Details	Details	Details
Measures	Temperature, Humidity	Temperature, Humidity	Temperature, Humidity	Temperature, Humidity
Accuracy	+/- 1.8 F, +/- 3 %	+/- 1.8 F, +/- 3 %	+/- 1.8 F, +/- 3 %	+/- 1.8 F, +/- 3 %
Description/Function	Digital Psychrometer - with calibration	Digital Psychrometer kit - with calibration	Digital Psychrometer	Digital Psychrometer kit
高度 Height	24.7 mm	24.7 mm	24.7 mm	24.7 mm
长度 Length	178.5 mm	178.5 mm	178.5 mm	178.5 mm
Ranging	- 20 C to + 50 C, 10 % to 90 %	- 20 C to + 50 C, 10 % to 90 %	- 20 C to + 50 C, 10 % to 90 %	- 20 C to + 50 C, 10 % to 90 %
宽度 Width	48.4 mm	48.4 mm	48.4 mm	48.4 mm
单位重量 Unit Weight	1 lb	3 lbs	1 lb	3 lbs