Dosatron D3RE2 / D3RE3000 VF-AF / D14MZ1000 / D15RE05VF Proportional Dosing Pump – Electricity-Free In-Line Fertilizer Injection

Hydraulic proportional dosing: the right dose every time, without electricity

Dosatron has manufactured hydraulic proportional dosing pumps in Tresses (France) since 1974. They are installed in-line with the irrigation water and use the pressure of the water itself as the sole driving force: zero electricity, zero electronics, and zero periodic calibrations. The incoming water drives the motor piston, which moves the dosing piston; this draws the concentrate from the bottle and injects it into the mixing chamber.

Injection is carried out at a fixed percentage of the flow rate, so the dose is always proportional to the volume of water even if the flow rate and pressure of the system vary. If the irrigation requires more water, the pump injects proportionally more concentrate. That is exactly what a peristaltic pump cannot do, as it delivers a fixed flow rate per unit of time and becomes unbalanced as soon as the line flow rate changes.

Available models

D3RE2-BP-VF-HY — ref. 500116 · 0.2 to 2 %

The workhorse of the range: the pump for injecting concentrated A/B base fertilizer in commercial grow rooms.

• Water flow rate: 10 l/h – 3 m³/h
• Operating pressure: 0.3 – 6 bar
• Dosing: 0.2 – 2 % (1:500 to 1:50) = 2 – 20 ml/l
• Concentrate injection: 0.02 – 60 l/h
• Connection: 3/4"
• Includes: 1.75 m 8×12 PVC suction hose and integrated bypass
• Seals: Viton (VF) · Weight: 2.3 kg

D3RE3000-BP-VF-HY — ref. 500118 · 0.03 to 0.3 % · VITON seals

Same hydraulic base as the D3RE2 but in the microdosing range: for additives, correctors, and products applied in very small quantities. Viton version, for neutral or low-pH products.

• Water flow rate: 10 l/h – 3 m³/h
• Operating pressure: 0.3 – 6 bar
• Dosing: 0.03 – 0.3 % (1:3000 to 1:333) = 0.3 – 3 ml/l
• Body: polypropylene · Connection: 3/4" NPT
• Maximum water temperature: 40 °C
• Seals: Viton · Weight: 2.7 kg

D3RE3000-BP-AF-HY — ref. 500117 · 0.03 to 0.3 % · AFLAS seals

Identical to the VF except for the seals, which are AFLAS. This is the version you should order for alkaline or high-pH products: pH increasers, calcium hydroxide, liquid lime, calcium carbonate, or potassium carbonate.

• Water flow rate: 10 l/h – 3 m³/h
• Operating pressure: 0.3 – 6 bar
• Dosing: 0.03 – 0.3 % (1:3000 to 1:333) = 0.3 – 3 ml/l
• Body: polypropylene · Connection: 3/4" NPT
• Maximum water temperature: 40 °C
• Seals: AFLAS · Weight: 2.7 kg

D14MZ1000-BP-VF-HY — ref. 500119 · 0.1 to 1 %

The intermediate range between the D3RE2 and the D3RE3000: for recipes requiring between 1 and 10 ml per liter.

• Water flow rate: 0.05 – 14 GPM
• Operating pressure: 4.3 – 85 PSI
• Dosing: 0.1 – 1 % (1:1000 to 1:100) = 1 – 10 ml/l
• Seals: Viton · Weight: 2.7 kg

D15RE05VF — ref. 500205 · 0.05 to 0.5 % · Hobby System EXPANSION

Attention: this model is an expansion doser, not a standalone unit. It is installed in series with a SYSD15RE05VF Hobby System (or with the Hobby Kit) to add one more bottle to the recipe. Buy it once you already have the Hobby line set up and need to inject an additional component.

• Water flow rate: 113 – 1,134 l/h (0.5 – 5 GPM)
• Operating pressure: 2.5 – 6 bar
• Dosing: 0.05 – 0.5 %
• Connection: 3/4" BSP · Dimensions: 160 × 133.5 × 345 mm
• Seals: Viton · Weight: 1.65 kg

How to choose your Dosatron

1. System flow rate. For up to about 1,100 l/h, the Hobby range (D15RE05VF and Hobby System) is sufficient. For up to 3,000 l/h, you need the D3RE / D14MZ range.
2. Available pressure. The Hobby range requires at least 2.5 bar — this is the most common mistake: it will not work with 1.5 bar of mains pressure. The D3RE starts at 0.3 bar, so it is the option if your pressure is low.
3. Recipe percentage. Concentrated base fertilizer → 0.2 – 2 % (D3RE2). Additive, pH corrector, or silicate → 0.03 – 0.3 % (D3RE3000). Intermediate point → 0.1 – 1 % (D14MZ1000).
4. Product chemistry. VF (Viton) for neutral or acidic; AF (Aflas) for alkaline.
5. One pump per bottle. A 4-part recipe requires 4 pumps in series. That is why the range is also sold in pre-configured kits.

Complete your dosing line

• Dosatron Line Accessories: starter kit, monitor kit, mixing chamber, and water hammer arrestor. The arrestor is highly recommended for systems with several pumps in series.
• Dosatron Spare Parts: the valve maintenance kit and the suction assembly are the standard consumables for these pumps.
• Dosatron Athena Pro Kit and Dosatron Athena Blended Kit: pre-assembled setups for those two nutrient lines.
• Dosatron Hobby Kit: the flagship product of the range for small and medium-sized crops.
• SYSD15RE05VF Hobby System: 4 dosers in series ready for a 4-part recipe.

At GrowIndustry we only work with proven quality products and trusted brands.

Every item goes through a check before shipping to make sure it arrives in perfect condition and ready to use.

Your satisfaction is our priority.

1. Check the flow rate and pressure of your system and choose the model: the D3RE range operates from 0.3 to 6 bar and up to 3 m³/h; the D15RE05VF requires a minimum of 2.5 bar.
2. Install the pump in-line on the irrigation pipe, with the arrow in the direction of the water flow and the bypass accessible. Use an upstream filter.
3. Insert the suction tube with its weighted filter to the bottom of the concentrate drum, without touching the sediment.
4. Adjust the dosing percentage by turning the graduated sleeve: loosen the nut, set the recipe value, and tighten it again.
5. Open the water slowly and bleed the air. You will hear the click-clack of the motor piston: this is a sign that the pump is dosing.
6. Check the mixture by measuring EC and pH at the outlet and adjust the percentage if necessary. Rinse with clean water after each campaign or product change.