Humidity Controller River Systems




The patented humidifier for humidity control NEBULA® can control humidity so that the set value is attained and kept constant, without producing wide, long-lasting and unwanted fluctuations in temperature and humidity during the incubation.

In fact, thanks to its continuous variable system, NEBULA® supplies energy to the water by means of an ultrasound generator, producing microscopic droplets (fog effect). The supplied hose conveys the droplets to the incubator.

Getting in contact with the heat, the droplets instantly evaporate creating humidity that the fan in the incubator homogenises. Moreover, the functioning of the humidifier humidity control NEBULA® is not affected by the surrounding area conditions.

  • User friendly
  • Made in Italy
  • Reliable
  • Accurate in measurement
  • Quickly reach the desired humidity level
  • Stable and consistent humidity and temperature
  • Compatible with all River incubators, not only with the ET series
  • Does not submerge the eggs in water
  • Keeps the incubator base clean
  • No part subject to wear, contrary to the peristaltic pumpsTechnical Characteristics
  • Voltage: 230 Volt 50/60 Hz single phase
  • Maximum power: 18 Watt AC
  • Average daily consumption: max. 0,2 kW/24h
  • External wiring: double insulated bipolar power cord; male mini-USB cable (sensor)
  • Display: digital humidity control with a decimal point and incubation days count
  • Precision humidity sensor: +/- 3%
  • Body: plastic material

User Manual



For the proper growth of the embryo, the eggs must be kept at a temperature of 37.7 degrees during the entire incubation time. The temperature can change by a maximum of 0.2 degrees. In order to keep a stable temperature, the incubator should be placed in a protected, warm, and draught-free place.

The right level of humidity in the incubator is, of course, provided by the humidifier. The device should be filled with water as it is consumed, to ensure an internal humidity level of 45-55%.

Just before hatching, the humidity will gradually increase to allow the chick to breathe more easily. Once the first chick has hatched, the humidity can be increased to 80%. Humidity is constant if the incubator is opened and closed as few times as possible.


During incubation, the right humidity levels are as follows:

  • Day 1 to Day 18: Humidity should be maintained at about 45% to prevent the shell from filling with fluid and suffocating the chick.
  • From the 18th to the 21st day: the humidity must be higher than 55%, up to 65%, to prevent the chick from piercing the egg without coming out, thus dehydrating itself.

A good incubator humidifier should be safe and stable. If an appliance does not constantly regulate the humidity inside the incubator, sudden changes can occur, leading to the death of the chick inside the shell. The bigger the incubator, the stronger the automatic humidifier should be. Otherwise, it will not be able to produce the right amount of steam to effectively hydrate the eggs and chicks.


Weight 1.2 kg
Dimensions 21 × 16 × 25 cm
Tank capacity 2L
Humidity range 30-90%
Voltage 230V 50/60Hz, single phase
Maximum power 18 Watt AC
Average daily consumption max. 0.2 kW/24 h
Humidity sensor +/- 3%

Additional information

Weight 1.0 kg


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