Whether you are putting together a small bottling line or just trying to get liquids from one container into another, the first decision is the same: do you need a tank, a pump, or a complete filler? The four options here cover all three roles, so the best pick depends on where your process starts and how much automation you want.
Quick take: The Grundfos 200L dosing tank is the storage backbone, the electromagnetic diaphragm pump is the transfer workhorse, the automatic quantitative filling machine is a single-station filler, and the 4-head mini filling line is the most complete turnkey option with a conveyor. Prices range from USD 278.95 to USD 530.68.
| Product | Listed price | Price bar |
|---|---|---|
| chemical dosing tank 200L Grundfos translucent white | USD 500.00 | |
| Dosing Metering Pump Electromagnetic Diaphragm Metering Pump Dosing Equipment | USD 278.95 | |
| Liquid Filling Machine, Automatic Quantitative Liquid Dosing Machine | USD 383.99 | |
| 4-Head Automatic Liquid Filling Machine Mini Filling Line 10-500ml Bottle Filler | USD 530.68 |
Quick decision guide:
- Choose the chemical dosing tank if you need a dedicated 200L reservoir and plan to connect your own pump.
- Choose the electromagnetic diaphragm metering pump if you need a stand-alone dosing pump and already have a liquid source.
- Choose the automatic quantitative liquid dosing machine if you want a machine that handles a wide 5-3,500 mL filling range.
- Choose the 4-head automatic filling line if you want a compact conveyor-based setup for 10-500 mL bottles.
chemical dosing tank 200L Grundfos translucent white

This 200L tank is the only storage reservoir in the group, and it carries the Grundfos name in the title. The description mentions compatibility with a range of Grundfos dosing systems, so it fits naturally into a dosing station built around that gear. For someone starting from scratch, this gives you a clear foundation to build around.
The trade-off is the condition: it is listed as 'New - Open box,' so it is not a sealed, factory-fresh unit. It is also just the tank, so the pump, lance, and stirrer are separate considerations. If you already have dosing hardware or want to source it separately, this tank gives you the volume and system compatibility to plan around.
Dosing Metering Pump Electromagnetic Diaphragm Metering Pump Dosing Equipment

If you already have a container and just need a pump to move a measured amount of liquid, this electromagnetic diaphragm dosing pump is the most direct option in this set. It is the only product here that is purely a metering pump, and the title calls out the electromagnetic diaphragm mechanism. The listed color is WS 01 07 S, so this listing covers the specific configuration shown.
The main limitation is that this is a pump, not a complete filling station. You will need a separate tank or liquid source, and the description indicates that buyers needing M or L models should contact the seller, so the listed unit is the one to focus on. If you are assembling a dosing setup from parts, this is the piece that moves the liquid.
Liquid Filling Machine, Automatic Quantitative Liquid Dosing Machine

This automatic quantitative dosing machine sits between the pump and the full filling line. The listing describes a filling range of 5-3,500 mL and a maximum flow rate of 3.2 L/min, which gives it a fairly wide operating window. The selected size is LT-160, and the description references several related models, so the LT-160 is the specific option in this listing.
The trade-off is that the model family includes multiple variants, which means you should treat the LT-160 version as the one being priced. It is also a filling machine rather than a tank-and-pump setup, so you are getting a more complete dosing and filling action in one unit. For small-scale filling and dosing work, this is a more complete option than a bare pump.
4-Head Automatic Liquid Filling Machine Mini Filling Line 10-500ml Bottle Filler

For a compact automated setup, this 4-head filling machine is the most complete package in the group. The title says it is a mini filling line for 10-500 mL bottles, and the description mentions a stainless steel mainframe, aluminum spacer, and a conveyor belt included. It also says sensors test front and back to make sure bottles are in place before filling.
The limitation is the bottle size range: 10-500 mL. That makes it ideal for small bottles, but not for larger containers or bulk fills. If you want a ready-to-run small-bottle line, this is the option that gives you the conveyor and multi-head setup.
Final recommendation by use case: Choose the chemical dosing tank if you need a 200L reservoir and want to build your own dosing station around a Grundfos-compatible system. Choose the electromagnetic diaphragm metering pump if you already have a liquid source and only need the dosing and pumping element. Choose the automatic quantitative liquid dosing machine if you want a single-machine filler with a broad 5-3,500 mL range. Choose the 4-head automatic filling line if you need a compact conveyor-based system for 10-500 mL bottles and want the highest level of automation here.