How to Take a Relative Humidity Measurement Using the IC-12-7043 Sling Psychrometer
A sling psychrometer is a portable and incredibly easy-to-use temperature and humidity measuring device that doesn't require batteries. The IC-12-7043 consists of a dry and wet-bulb encased in a sturdy plastic casing with an onboard scale to aid in converting the results into a relative humidity measurement. The IC-12-7043 psychrometer is a worthwhile consideration for environmental monitoring, capturing field measurements and indoor applications where portability and low maintenance are critical.
Figure 1 Watch an Instrument Choice unbox and demonstrate how to measure relative humidity using the IC-12-7043 Sling Psychrometer here.
How to Take a Relative Humidity Measurement Using the IC-12-7043 Sling Psychrometer
You will need:
- The IC736700 Sling Psychrometer
- 50mL Water (approx.)
Taking a Measurement
- Twist to remove the reservoir cap on the end of the meter body.
- Immerse the end of the psychrometer body in water for 30 seconds or more, until the wick is saturated.
- Remove the psychrometer from water then fill the reservoir with water. Once full, replace the cap.
- Touch the wick to ensure it is wet and adjust if necessary to ensure it is completely covering the bulb.
- Pull the meter body from the tube until the body hangs free.
- Using the tube as a handle, whirl the body around in the air for a minute and a half.
- Read and record both the wet and dry bulb recorded temperatures immediately after spinning.
- Replace the body into the tube.
Using the Scale to Calculate Relative Humidity
- The upper-scale on the meter represents wet-bulb readings, and the centre movable scale represents the dry bulb reading. Find the markers for your dry and wet-bulb readings on each scale.
- Pull the tube to move the dry recorded reading to line up with the measured wet-bulb reading.
- When the two readings line up, find the small arrow on the dry-bulb scale pointing to the bottom row. This arrow is pointing to the relative humidity result.
- Always repeat measurements to ensure accuracy.
Conclusion
Relative humidity can be determined in twelve simple steps using the low-maintenance, low-cost, and battery-free IC-12-7043 Sling Psychrometer.
Not sure if this psychrometer is right for your needs? Want more information on the IC-12-7043? Contact an Instrument Choice scientist. Our team members can know sling psychrometers inside out! Call 1300 737 871 or email [email protected]
Additional links
- View the IC-12-7043 Sling Psychrometer here.
- Watch 'How to Take a Relative Humidity Measurement Using the IC-12-7043 Sling Psychrometer' again.
- Want to know what comes in the box with the IC-12-7043? Watch an Instrument Choice Scientist 'Unboxing the IC-12-7043 Sling Psychrometer'
- Read the Instrument Choice blog article 'How to Harness the Hidden Value of a Sling Psychrometer.'
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