Get the Reports You Need to Invoice Faster and More Accurately

We designed the RM3250 to help you monitor electronic flow meters that use a Mercury or Modbus interface. The RM3250 captures critical measurements from third-party devices such as corrected and uncorrected volume, temperature, pressure, and battery voltage.

The RM3250 also provides:

Insights that Improve Billing – Continuous access to electronic flow meter data means that you can always generate highly accurate reports that help improve invoicing. For example, you’ll be able to easily see when a customer is consuming more product than usual and make sure they’re being billed accordingly.

Around-the-Clock Data Access – The RM3250 uploads your data to our cloud portal, Bullhorn Web, which you can use to configure your device or run reports anytime, anywhere.

Hands-off Management – The battery on this unit can last approximately five years, even if it’s transmitting a reading every day. Combine that with remote configuration capabilities and fully internal components that are difficult to damage, and you get a unit that your crews rarely need to visit.

Data Protection – Bullhorn Web reliability stores data for 18 months, giving you the ability to view trends over time without setting up data stores or backups. It also includes a back-end system for disaster recovery, so your data is always safe.

Instant Alerts – You’ll never have to worry about an unknown problem with your unit since you can configure text or email notifications that will immediately inform you about high-priority situations like a low battery or unusually high consumption rates.

Easy Integration– Bullhorn Web allows you to export data in Excel or CSV formats so you can upload it to your measurement databases as needed.

Input Power

Internal, field-replaceable lithium batteries
10-24V DC
Solar input


Bullhorn Web

Manage measurement and transmission schedules, alerts, alarms and reports

Bullhorn Tools PC

Connect via Bluetooth Low Energy or
USB cable to manage serial communication settings, measurement and transmission schedules, alerts, alarms and reports

Bullhorn Tools Mobile

Connect via iOS and Android

Serial Interface

Connect via iOS and Android

Serial Protocol

Mercury – Instrument types: Mini-Max, Mini-AT | Baud
rate: 9600, 19200, 115200

Modbus – Mode: RTU | Baud
rate: 9600, 19200, 115200


Worldwide compatibility on LTE networks


Temperature: -30° C to +60° C