Everything for horticulture Personal advice from our specialists Worldwide delivery of 30 000 products
Search your products below, and request a quote within 30 seconds
Shop   Knowledge center  Machines & installations   How to use a Pulsfog

How to use a Pulsfog?

Written by Frank Schoenmakers | Last update: 03-09-2020

Many growers use a Pulsfog to cover a lot space at once. With a Pulsfog you spray the desired crop protection product over the destined crop. When using a Pulsfog there are a few things you should pay attention to. In the article below we will summarize these attention points for you.


Before you start the treatment with the Pulsfog, you need to make some preparations. First: fill the petrol tank with clean petrol. Do not use premium grade petrol, but normal quality petrol. When filling the tank, use the petrol measuring cup with filter. Attention: Never start a space treatment with the Pulsfog with less than half a tank of petrol. The maximum fuel capacity is sufficient to empty the liquid tank.

After that run, the engine briefly and stop it again. If the engine is working properly, you can start filling the liquid tank. Do this as follows:
  • Open the tank cap.
  • Remove the hose from the tank and hang it on the spray nozzle via the dosing nozzle.
  • Loosen the tank holder and take out the tank with the opening facing upwards.
  • Fill the liquid tank. It may be filled with a maximum of 9 liters of liquid.
  • Use the filling funnel with strainer for filling.
  • Carefully reconnect the tank to the unit after filling.
  • Screw the tank cover with hose close. 

Check if the dosing nozzles are properly fastened and tightened. If they are not tightened properly, toxic substances can be sprayed onto the face and body due to the pressure of the tank.

Starting the engine

After making the preparations, you can start atomizing. To do this, first start the engine. This is done as follows: 
  • Turn the liquid tap to the 'closed' position.
  • Open the fuel filler adjuster on the carburetor to the starting position. Turn it approximately 1/3 of the way. If the unit is hot 2/3. Note: if you open the adjusting screw too far, the engine will get too much petrol and the carburetor may drown.
  • Pump the air ball slowly and several times with your left hand until the engine starts. Keep the air ball pressed down for a few seconds to extend the ignition. Attention: do not press the air ball strongly when the fuel tank is full, because the starter carburetor may overflow.
  • Once the engine has started, adjust the carburetor adjuster until the engine starts with a powerful, deep tone. Usually you will have to open the adjuster further for this. Then let the engine warm up for 1 minute. Attention: if the engine makes a high, clear tone, this indicates a weak engine power and overheating, resulting in excessive droplets and/or over dosage.

Starting the Atomizing/spraying

To start spraying, open the liquid tap. The Pulsfog will then immediately start atomizing. During spraying, the motor frequency may change slightly under load. In that case, reset the carburetor. In most cases you do this by opening the adjusting screw a little further. If you want to interrupt the misting process while the engine is running, close the liquid tap. 

During atomization, the Pulsfog consumes gasoline. If the gasoline level has dropped to 1/4 or less, keep the unit as steady as possible and do not point the Pulsfog more than 45⁰ up or down. This prevents air from being sucked into the fuel line. An air bubble can cause the engine to stop.

Stopping the Atomizing/spraying

  • If you want to stop the spraying, proceed as follows:
  • Loosen the clasp on the tank and wait for the unit to stop spraying.
  • Then close the liquid tap.
  • Stop the engine by closing the adjuster on the carburetor. Note: Never stop the engine before closing the valve. If you do, the remaining residue in the tank will flow further to the hot mist pipe. Here the fluid may ignite, or black soot clouds may form which contaminate the spark plug or the carburetor.

Cleaning the Pulsfog after usage

A Pulse fog must be cleaned after each use. This prevents crop protection agents from being left behind in the machine. If you do not do this and atomize crop protection agents left behind in the Pulsfog over the crop, then this can cause crop damage.

First clean the tank of the Pulsfog. Remove the tank and rinse it with water. Then mist with about 1 liter of clear water to clean the pipes. You can choose to add a little alcohol or a few drops of detergent, this will improve the cleaning.

Then clean the diaphragms of the carburetor. During atomization, the liquid may end up in the carburetors. This causes bonding of the diaphragms, which can hinder the restart. Cleaning the diaphragms of the Pulsfog can be done in different ways:
  • Unscrew the diaphragm valve and blow the diaphragm through on both sides using compressed air.
  • Rinse the diaphragm valve in hot water from about 60⁰C. You can also rinse with lukewarm water with cleaning alcohol. This is especially important after spraying with formalin or glutaric aldehyde.
  • Place the diaphragm valve in a container with clean petrol for 5 minutes and then dry with compressed air.


For the proper functioning of the Pulsfog it is very important that you carry out certain maintenance, such as checking the hoses, topping up the battery acid and flushing the machine regularly. This not only extends the life of the machine, but also ensures the best result.

Related products

Questions about the Pulsfog

Do you have questions about the use of a Pulsfog, or would you like tailor-made advice? Please contact product specialist Frank Schoenmakers using the contact form below. We will contact you as soon as possible - on weekdays even within 24 hours.

Frank Schoenmakers Schoenmakers About Frank Schoenmakers

With over 30 years of experience, having been a mechanisation product specialist, Frank Schoenmakers has gained significant experience within the horticulture sector. Over the past years he has specialised in spraying techniques. How he feels About that himself? "The great thing about my job is that I can use my knowledge to help growers to improve their cultivation. The reciprocal appreciation is quite valuable."

Do not delete this link