GARDENA MultiControl duo irrigation computer (1874-20) with LC display
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Product description
What it is and why it exists
The GARDENA Irrigation Computer MultiControl duo (1874-20) is an automatic irrigation controller designed to make garden watering more consistent without tying you to manual set-up every day. The headline feature on paper is simple: it supports two completely independent outputs and lets you programme irrigation across weekdays, with up to three irrigation events per day.
Where it becomes more interesting is in how you can stop watering when it isn’t needed. Depending on which sensor you use, the controller can prevent irrigation based on soil moisture (and it can also work with a rain sensor). That’s the kind of “small automation” that can add up, especially in UK gardens where the weather can swing quickly.
Key takeaways
If you want an easy way to automate common garden watering—such as drip-style systems or sprinkler setups—this controller is the sort of mid-range “set-and-forget” unit that makes sense. Having two independent outputs is particularly useful if you’re trying to manage different zones (for example, one area that dries faster and another that needs less frequent watering).
That said, it does come with limitations you should be aware of. It runs on a commercial 9-V battery, and the battery is not included. Also, the ability to use sensor-based “demand prevention” depends on connecting the appropriate GARDENA rain or soil moisture sensor, which is described as optional in the information provided.
What you’ll notice in everyday use
This is built around straightforward scheduling. You programme the outputs using a removable control panel, and then the unit handles the timing according to your plan.
A practical example: imagine you have a planted area near a wall and a separate lawn-adjacent strip. You could set one output to have more frequent watering in the morning/afternoon (up to three events a day if needed), while the second output follows a different schedule. If you then connect the soil moisture sensor for the relevant output, watering can be prevented when the ground indicates it’s already sufficiently moist.
It also has an LC display, which helps keep day-to-day checking less of a guessing game than controllers that rely purely on tiny indicators.
And yes—if you’re expecting it to “just work” as smart irrigation with no extra setup, it may feel a bit incomplete. Sensor-based savings rely on adding the optional sensors.
Where it shines (and where it may fall short)
Where it shines: - Two independent outputs, which is genuinely handy if your garden isn’t one single watering zone. - Weekdays programming plus the ability to schedule multiple irrigation events per day (up to three). - A sensible water-saving angle through sensor integration, including rain and soil moisture options. - Battery-powered operation, which can be convenient when you don’t want to run mains power to the controller.
Where you may want to think twice: - Battery life is described as about one year, but the battery itself isn’t included, so you’ll need to budget for a 9-V unit. - The information only confirms sensor-based control when specific sensors are connected, without them, you’re mainly relying on your schedule. - It’s an irrigation controller rather than a full “smart home” system, so if you want app control or advanced analytics, this won’t be that kind of product.
Tech summary
- Name: Gardena Irrigation Computer Multicontrol Duo (Automatic Irrigation Control)
- Model/reference: 1874-20
- Display: LC display
- Outputs: Two completely independently programmable outputs
- Scheduling: Weekdays programmable, up to 3 irrigation events per day
- Power: Battery operation using a commercially available 9-V battery (battery not included)
- Sensor support (optional, per output):
- Can be connected to each output: Gardena rain sensor and Gardena soil moisture sensor
- Demand prevented depending on soil moisture (only soil moisture sensor is specifically mentioned for this behaviour)
- Compatibility/can automate common systems (as stated): e.g. Gardena Micro-Drip system or Gardena sprinkler system
- In the box: 1x Gardena MultiControl duo (batteries not included)
Who it suits best
It makes sense if you’re running a fairly typical garden irrigation set-up and you’d like more control than a basic timer. A two-output controller is often a sweet spot for households with separate watering needs, because you can keep scheduling independent without needing a second entire unit.
It’s also a reasonable choice if water saving is a priority for you, since the design is meant to work with a rain sensor and/or soil moisture sensor to prevent unnecessary watering.
Final verdict
Should you buy it?
Worth considering if you want weekdays scheduling, up to three irrigation runs per day, and the flexibility of two independent watering outputs—especially if you’re willing to add optional sensors for water-saving control.
It might not be the best match if you expect a mains-powered controller with included battery, or if you want a fully “smart” system with advanced features beyond scheduled automation and optional sensor input.
One more practical note before buying: double-check you’re ready to supply a 9-V battery and, if you care about the sensor-driven prevention described, ensure you’ll use the relevant GARDENA rain/soil moisture sensor for the output(s) you want to control.
Quick FAQs
Is the rain sensor and soil moisture sensor included?
No—based on the information provided, connecting the GARDENA rain sensor and soil moisture sensor is described as optional.
How is it powered?
It uses a commercially available 9-V battery, and the battery is not included. Operation is described as lasting about one year.
How many irrigation events can I schedule per day?
The controller allows up to three irrigation events per day.
Can I control different watering zones separately?
Yes. It has two completely independently programmable outputs.
What’s in the box?
You get 1x GARDENA MultiControl duo, with batteries not included.