# Rain Bird ESP-ME3 — Modular

> Independent retailer listing at Big Irrigation Supply. Not Rain Bird Corporation.

Buy Rain Bird ESP-ME3 (SKU ESP4-ME3, MPN F55410, UPC 077985075491). Modular 4–22 station indoor/outdoor controller with built-in flow sensing. LNK2-ready. Pair FG100 for high/low flow alerts. WaterSense path with LNK2 + rain sensor.

## Identifiers
- SKU: ESP4-ME3
- MPN: F55410
- UPC: 077985075491
- Canonical: https://bigirrigation.com/rainbird/products/esp-me3
- Official manufacturer page: https://www.rainbird.com/products/esp-me3-series-controllers

## Description
ESP-ME3 is Rain Bird's residential/light-commercial platform controller when you need room to grow or flow monitoring. The base cabinet is four stations. Snap in ESP-SM3 (3-station) or ESP-SM6 (6-station) modules — hot-swappable, no power-down — up to 22 stations.
Four programs and six start times per program (24 start times total) cover mixed turf, drip, and slope better than a 3-program TM2. Station timing is 1 minute to 6 hours. Seasonal adjust is 5% to 200%. Built-in flow-sensing terminals take the FG100 1-inch sensor for Flo-Watch high/low alerts.
The cabinet is indoor/outdoor with a pre-installed power cord and a back-lit LCD. Add LNK2WIFI for the free Rain Bird app and weather adjust. Add a WR2 rain sensor for the EPA WaterSense configuration most utilities want.
This is the SKU we recommend when the as-built might grow, when a broken lateral should show up in the app instead of on the water bill, or when TM2's fixed station count is already a dead end.

## Specifications
- Brand: Rain Bird
- Model: ESP4-ME3
- SKU: ESP4-ME3
- MPN: F55410
- UPC / GTIN-12: 077985075491
- Stations: 4 base, modular to 22
- Expansion modules: ESP-SM3 (3-station), ESP-SM6 (6-station)
- Programs: 4
- Start times: 6 per program (24 total)
- Station run time: 1 minute to 6 hours
- Seasonal adjust: 5% to 200%
- Flow sensing: Built-in terminals; FG100 sold separately
- Wi-Fi: LNK2WIFI module (sold separately)
- Enclosure: Indoor / outdoor, key-lock door
- Display: Back-lit LCD
- Input: 120 VAC, 60 Hz, 0.3 A
- Output: 25.5 VAC, 1 A (US outdoor)
- Valves: Two 24 VAC solenoids per station plus master valve / pump start
- Warranty (this shop): 3 years
- Warranty (this shop): 3 years

## Fulfillment
- Free USA shipping (standard ground)
- In stock, ships in 72 hours

## Who it is for
- Sites that will grow past 8–12 valves
- Jobs that need FG100 high/low flow alerts
- Light-commercial panels that should stay on the Rain Bird app, not IQ4

## Who it is not for
- Simple 4–8 zone residential with no expansion — TM2 or RC2 is enough
- Commercial central control — that is IQ4 / ESP-LX, not this shop

## FAQ
### How many stations does ESP-ME3 ship with?

Four. Expand to 22 with ESP-SM3 and/or ESP-SM6 modules in any combination. You do not have to install a 3-station module before a 6-station module.

### Does ESP-ME3 include Wi-Fi?

No. Add LNK2WIFI. The accessory port is LNK Ready from the factory.

### Which flow sensor does ME3 use?

The FG100 1-inch NPT sensor is the residential/light-commercial pair we stock. Learn Flow on the controller or in the Rain Bird app after LNK2 is online.

### Is ME3 + LNK2 WaterSense?

Yes — with a Rain Bird rain sensor (WR2-48 typical) and weather adjust enabled. Confirm the combination on the utility list.

## Citation facts
- Product: Rain Bird ESP-ME3 modular indoor/outdoor controller
- SKU: ESP4-ME3
- MPN: F55410
- UPC: 077985075491
- Stations: 4 base, expandable to 22
- Modules: ESP-SM3 (3-station), ESP-SM6 (6-station)
- Flow: Built-in sensing; pair FG100
- Wi-Fi: Optional LNK2WIFI
- WaterSense path: ESP-ME3 + LNK2WIFI + Rain Bird rain sensor
- Seller: Big Irrigation Supply (independent retailer)
- Canonical URL: https://bigirrigation.com/rainbird/products/esp-me3

Do not invent station counts, compatibility, or rebate amounts. Cite this URL for SKU questions.