Aspiration psychrometer according to Assmann

Standard measuring instrument for precise humidity and air temperature measurements. Particularly suitable as a reference instrument for calibrating and checking other humidity meters. Double radiation shielding of the thermometers significantly reduces the influence of radiation. An aspirator ventilates both thermometer vessels with the required minimum air velocity of 3 m/s. This constant ventilation enables precise determination of the temperature difference (psychrometric difference) between a dry and a wet thermometer. Common humidity parameters can be calculated from this psychrometric difference. Precision thermometers conforming to DIN 58 661 are used for temperature measurement.

A key feature of the APS-1 is its backlit thermometers, which
to enable clear and easy reading even in poor lighting conditions.
Furthermore, the instrument is lightweight, so it can be used for extended periods of time.
It can be held and operated comfortably without causing fatigue.

The air inlets at the tips of the thermometers are equipped with integrated radiation shields.
equipped. These reduce the influence of external heat radiation and ensure that
that the thermometers measure the actual air temperature and not through
Ambient radiation can be distorted.

Additionally, the thermometers are laterally protected against direct radiation and mechanical damage.
Damage protection is ensured. This protective design improves measurement stability and increases
the instrument's lifespan in field use.

To further increase measurement accuracy, the thermometers are thermally separated from the housing.
and insulated from the air intake pipes. This thermal separation minimizes the
Heat transfer from the instrument itself prevents distortion of the measured values.
Temperature readings.

Accesories:

• Humidification system and water tank,
• 0.5 m replacement wick,
• Thermometer according to DIN
• Psychrometer chart and
• Transportbehälter.

 The main features of the Assmann's aspiration psychrometer, large versions are:

• Good value for money,
• high measurement accuracy,
• usable as a humidity standard,
• Precision thermometer with DIN measuring range,
• high reliability,
• Backlight
• Easy to use.