Key facts
- Brand
- EXTECH
- Model
- RH300
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-01
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Extech RH300-CAL Relative Humidity Calibration Reference Standards Information Sheet
The Extech RH300-CAL is a Relative Humidity Calibration Reference Standard designed for use with Extech RH300 Humidity Meters. The kit includes two bottles: one providing a 75% Relative Humidity reference using Sodium Chloride (NaCl) and another providing a 33% Relative Humidity reference using Magnesium Chloride (MgCl).
The document provides specific Relative Humidity reference values for both standards at various temperatures ranging from 50°F to 95°F. It also outlines care instructions, noting that the reference bottles must be kept tightly sealed when not in use and should be replaced immediately if the contents dry out or harden.
EXTECH RH300 specifications
| 75% Reference Standard Composition | Sodium Chloride (NaCl) |
|---|---|
| 33% Reference Standard Composition | Magnesium Chloride (MgCl) |
| 75% RH at 68°F (20°C) | 75.47% |
| 33% RH at 68°F (20°C) | 33.07% |
Source: Extech RH300-CAL Relative Humidity Calibration Reference Standards Information Sheet
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Questions answered in these manuals
What chemicals are used in the RH300-CAL standards?
The 75% reference uses Sodium Chloride (NaCl) and the 33% reference uses Magnesium Chloride (MgCl).
From: Extech RH300-CAL Relative Humidity Calibration Reference Standards Information Sheet
What is the Relative Humidity of the 75% standard at 75°F?
The Relative Humidity is 75.29% at 75°F (24°C).
From: Extech RH300-CAL Relative Humidity Calibration Reference Standards Information Sheet
What is the humidity measurement range?
The humidity range is 10 to 90%RH.
Does the RH300 measure external temperature?
Yes, it can measure external temperature using an optional external temperature probe (TP890).