Dramm Cold Fogger AR 50 Gallon Sprayer
The Dramm ColdFogger applies crop protection products at very low volume through extremely fine droplets. A 120 volt, 60 Hz single-phase motor drives a hydraulic diaphragm pump that runs at 2,800 to 3,000 psi. At that pressure the spray gun produces droplets averaging 30 to 40 microns. Dramm contrasts that with conventional high volume sprayers, whose droplets typically run 100 to 150 microns. The fine fog projects 20 to 25 feet from the gun and rustles the canopy enough to reach leaf undersides. Average discharge is about 52 liters, or 13.6 gallons, per hour. The 50 gallon tank sits on a cart with a separate agitation pump that keeps the solution in suspension. A bypass valve and pressure regulator let the operator prime the pump before spraying. The built-in hose reel holds 150 or 300 feet of high pressure discharge hose, depending on the version chosen. The spray gun connects with a quick disconnect coupling and has a built-in filter against clogging. A second filter sits in the tank, and a drain valve under the tank empties it for cleaning. The motor has a 15.6 amp self-resetting thermal overload that shuts down on overheating or voltage drop. Versions are available with standard wheels or BigFoot pneumatic wheels for rough floors.
How a Low Volume Sprayer Covers a Greenhouse
Low volume application uses the labeled amount of product for an area, mixed into far less water. Dramm recommends about 10 liters of solution per 10,000 square feet for most greenhouse and nursery crops. Potted and bedding plants need roughly 1 liter per 1,000 square feet. Crops with more plant mass, such as cut flowers or tomatoes, take more solution. To find the dose for 10,000 square feet, multiply the labeled rate per 100 gallons by 0.4. Dramm reports that this method applies chemicals about 10 times faster than high volume spraying. Fill the tank at least three quarters with water, start the agitation pump, then add the premixed product. Spray over and through the crop from beyond 7 feet, walking at a pace of about 1,000 square feet per minute. Do not spray to the point of run-off or glisten, since no visible residue should remain. Growth regulators should still go on at conventional high volume rates to avoid over-application. A larger 0.015 inch nozzle tip is available when a bigger droplet is needed. Change the 15W-40 pump oil after the first 100 hours, then every 500 hours or six months. Clean the gun filter every 10 to 20 hours and rinse the tank and filter after every use. Always follow the product label, wear full protective gear and never point the gun at a person.
Key Features
- 3,000 psi Diaphragm Pump: Runs at 2,800 to 3,000 psi, rated to a 3,200 psi maximum.
- 30 to 40 Micron Droplets: Fine fog reaches deep into the canopy and leaf undersides.
- 20 to 25 ft Throw: Treats benches and aisles from a distance.
- 50 Gallon Tank: Separate agitation pump keeps solution in suspension.
- Hose Reel: Stores 150 or 300 ft of high pressure hose.
- Quick Disconnect Gun: Built-in filter guards against clogging.
- Thermal Overload: 15.6 amp self-resetting motor protection.
- Wheel Options: Standard wheels or BigFoot pneumatic wheels.
Technical Specifications
| Specification | Value |
|---|---|
| Brand | Dramm |
| Model | ColdFogger AR 50 (CFAR-50) |
| Tank Capacity | 50 gallons |
| Pump | Hydraulic diaphragm |
| Operating Pressure | 2,800 to 3,000 psi |
| Maximum Pressure | 3,200 psi |
| Average Droplet Size | 30 to 40 microns |
| Discharge Rate | About 52 L/h (13.6 gal/h) |
| Spray Distance | 20 to 25 ft |
| Motor | 120 V, 60 Hz, single phase, 15.6 A |
| Power Cord | 10 ft grounded |
| Hose Length | 150 ft or 300 ft |
| Wheels | Standard or BigFoot pneumatic |
| Agitation | Separate agitation pump |
| Optional Nozzle Tip | 0.015 in for larger droplets |
| Warranty | 6 months limited |