Grundfos · Mobile Interface Module
MI 301 Bluetooth Mobile Interface
The radio and infrared bridge between your smartphone and a Grundfos pump. Pairs to an iOS or Android device over Bluetooth Low Energy and connects to the pump by radio or IR, giving you setup, status and live operating data in the Grundfos GO app. Required for CMBE, CMBE TWIN and every other Grundfos product that talks to Grundfos GO.
Bluetooth Low Energy
Radio and IR
30 m Radio Range
8 h Operating Time
Rechargeable Li-ion
Part No. 98046408
Overview
Grundfos GO and GO Remote are the apps that set up and monitor a Grundfos pump from a phone or tablet. Neither one talks to a pump directly — the MI 301 is the mobile interface that makes the connection. It pairs to an Android or iOS smartphone over Bluetooth Low Energy, then reaches the pump by radio or by infrared, whichever that product supports.
The module is a pocket-sized unit with a rechargeable Li-ion battery, a single power button and a status LED. Press the button, watch the LED flash blue while it searches and green once it connects, and the app is talking to the pump. It switches itself off when not connected to preserve battery life, and a full charge takes about five hours over the supplied USB cable for a minimum of eight hours of use.
Two connection methods are available in the app. Radio - List scans for every radio-enabled Grundfos product in range and shows product name, pump status, signal strength and whether the product is locked — useful when the pump is buried in a mechanical room or up on a roof. Radio - Connect goes straight to one product for quick, direct access. IR - Connect points the infrared transmitter at the pump's receiver from no more than one metre for products that use infrared.
What Ships and What It Needs to Run
Included: the MI 301 module, battery charger, USB cable and quick guide (part number 98046408).
Required: a smartphone with the Grundfos GO app, and a Grundfos product that talks to Grundfos GO.
Genuine Grundfos equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial supplier.
Which Connection Does Your Product Use?
Find your Grundfos product in the list. A dot in the column means the MI 301 can reach it by that method. Products with both give you a choice; products with only one must use that one.
| Grundfos Product |
Infrared (IR) |
Radio |
| CME, CHIE, MTRE multistage pumps (the pump in CMBE and CMBE TWIN) |
Yes |
Yes, MGE motors model H or later |
| CRE, CRNE, CRIE multistage pumps |
Yes |
Yes, MGE motors model H or later |
| TPE single-stage pump |
Yes |
Yes, MGE motors model H or later |
| NBE, NKE single-stage pumps |
Yes |
Yes, MGE motors model H or later |
| Hydro Multi-E booster system |
Yes |
Yes, MGE motors model H or later |
| AUTOADAPT sewage system (CIU 272/902) |
Yes |
Yes, with add-on CIM 060 module |
| MAGNA3 circulator |
-- |
Yes |
| UPE and MAGNA circulators |
Yes |
-- |
| MP 204 motor protector |
Yes |
-- |
| CU 3 motor protector |
Yes |
-- |
| CU 300, 301 controllers |
Yes |
-- |
| CIU 273 SQFlex / CIU 903 |
Yes |
-- |
| IO 351 module |
Yes |
-- |
| CU 362 Dedicated Controls wastewater controller |
-- |
Yes, with add-on CIM 060 module |
| CIM 290 |
-- |
Yes |
| CIM 550 |
-- |
Yes |
| LC 2XX |
-- |
Yes |
Support list from the Grundfos MI 301 installation and operating instructions (publication 92555648, 02.2026). The Grundfos product must support IR or radio for the MI 301 to reach it — check the product's own manual if it is not listed here.
Model & Part Number
| Model |
Description |
Included |
Part No. |
| MI 301 (M02) |
Bluetooth mobile interface for Grundfos GO and GO Remote |
MI 301 module, battery charger, USB cable, quick guide |
98046408 |
The battery charger is included with part number 98046408. The Grundfos GO and GO Remote apps are free from the Apple App Store and Google Play Store.
Key Features
-
Two connection paths — built-in radio and infrared, so one module covers the whole Grundfos range instead of two tools.
-
Radio - List — scans every radio-enabled Grundfos product in range and reports name, status, signal strength and lock state, without physical access to the pump.
-
Wink command — flashes an indicator light on the pump you have selected in the list, so you know you are looking at the right unit before you change anything.
-
Bluetooth Low Energy to the phone — pairs once, then reconnects; no cables between phone and module.
-
Rechargeable Li-ion battery — 3.7 V, 500 mAh, minimum eight hours of operating time, charged over USB.
-
Automatic power-off — the module switches off when not connected to preserve battery life.
-
Status LED — green solid while charging, flashing blue while searching, flashing green when connected, fast flash when nearly discharged.
-
Over-the-air software updates — Grundfos GO notifies you when an update is available and walks it through on screen.
Specifications
| Specification |
Value |
| Type |
Mobile interface module for Grundfos GO and GO Remote |
| Model |
MI 301 (M02) |
| Built-In Battery |
Li-ion 3.7 V, 500 mAh, 1.85 Wh, rechargeable |
| Current Consumption |
Max 30 mA |
| Charging Time |
5 hours |
| Operating Time |
Min 8 hours at 30 mA and 100 percent battery |
| Enclosure Class |
IP40 |
| IR Transmission Angle |
Plus or minus 12 degrees |
| IR Range |
Min 2 metres (point within 1 metre of the receiver when connecting) |
| Radio Band |
IEEE 802.15.4 (GlowPAN), 2400 to 2483.5 MHz |
| Radio Range |
Up to 30 metres in free environment, no angle restrictions |
| Radio Transmit Power |
Max 0 dBm (1 mW) |
| Bluetooth Band |
BLE, 2402 to 2480 MHz |
| Bluetooth Range |
Up to 10 metres |
| Bluetooth Transmit Power |
Max 5 dBm (3 mW) |
| Operating Temperature |
-4 to 122°F (-10 to +50°C) |
| Storage Temperature |
-4 to 158°F (-20 to +70°C) |
| Relative Humidity |
Max 95 percent |
| Compatible Apps |
Grundfos GO and Grundfos GO Remote, iOS and Android |
| Approvals |
FCC Part 15 Class B, ISED Canada RSS, CE, UKCA |
| Country of Origin |
Thailand |
Applications
- Commissioning a CMBE or CMBE TWIN booster without a laptop
- Changing a pressure set point or reading operating data in the field
- Reading pump status and alarm history on a service call
- Locating and identifying pumps in a mechanical room using Radio - List and the wink command
- Pushing Grundfos firmware updates to a connected product
Before You OrderThe MI 301 is required to use Grundfos GO with CMBE and CMBE TWIN — the app cannot reach the pump without it. Confirm your Grundfos product supports IR or radio in the table above; radio on CME, CRE, TPE and NBE motors requires an MGE motor of model H or later. Charge the module before the first use, and do not charge it where the ambient temperature exceeds 113°F (45°C).
