Price Check Guarantee

Price Check Guarantee

Nationwide Installations

Nationwide Installations

Next Day Deliveries

Next Day Deliveries

Free Expert Advice

Free Expert Advice

Free Site Survey

HWg-PWR12 Data Acquisition Units

Prices from £419.00 including VAT or £502.80 ex. VAT
Prices from £502.80 inc. VAT
Prices from £419.00 ex. VAT
Total price delivered from £427.95 ex. VAT or £513.54 inc. VAT
Total price delivered from £513.54 inc. VAT
Total price delivered from £427.95 ex. VAT
In stock deliveryIn stock (1), despatch within 5 working days
Lead times delivery guide

Lead Times & Delivery Guide – contact us for a specific day/time

Price check guarantee

Our Price Check Guarantee ensures value for money when buying this product

Reward points
Earn 209 SRE Reward Points when you buy this product

Pay using our secure payment gateway with a debit/credit card, your Amazon, Google or PayPal account, make a BACS payment, open a credit account or request a leasing quotation.

Payment Methods – All major cards accepted
Payment footer

The HWg-PWR12 is a smart Ethernet gateway which can be used capture data from up to 3 external meters using MODBUS (M-BUS). Using external M-Bus (EN 13757) meters the device can be used to remotely monitor the metering of water, electricity, gas or heat consumption. The M-BUS data can be made available over the web (using graphics), SNMP, email and log files. The PWR12 alarms for out-of-range/abnormal values via email or SMS which can be sent via the HWg-SMS-GW3 gateway when installed on the same local area network.

The PWR12 has a built-in web server for ease of configuration and can be remotely monitored over the internet using the SensDesk Cloud portal or SensDesk Mobile App (iOS or Android).

HWG-PWR devices are designed to monitor external M-BUS meters over a network using Machine-2-Machine (M2M) protocols including MODBUS/TCP, SNMP, XML and others. The devices can support over 50 SNMP and SCADA applications and can be used as a standalone solution or built-into in a wide range of monitoring and control systems.

Key Features

  • Connect PWR12 to external meters using the MODBUS (EN 13757-2) interface and log up to 170,000 values (3 values every 15 minutes = 590 days)
  • Machine-20-Machine (M2M) communication protocols include MODBUS/TCP, SNMP and XML
  • Connected via local area network and configured via a built-in web server.
  • Connected meter failure or out of specified range value sends an alert via email, SMS or SNMP
  • Use the HWg-SMS-GW3 gateway for a Ring or SMS alert on the same LAN.
  • Data logging can be exported using the HWg-PDMS software into Microsoft Excel.
  • Compatible with a range of third-party software platforms including SCADA applications. Examples available in the Borland C++, MS Visual, VB, C#, PHP, JAVA and more.

Energy Monitoring Gateway

  • Sends an alarm message (email, SMS or SNMP) in the event of failure or value out of a specified range
  • Converts energy consumption from kWh to monetary values without a computer or additional software
  • Periodically sends energy consumption reports for a given period as an email attachment
  • 8xDigital Inputs (DI) for detecting single-phase 110/230Vac power outages
  • Logs selected values and displays graphs over a web interface
  • Actively uploads data to a portal using the HWg-Push protocol


  • Remote monitoring of electricity meters in server rooms and telecoms sites
  • Energy consumption monitoring in rented premises
  • Reading energy consumption data in remote or inaccessible areas
  • Control over energy costs
  • Checking individual supply line for overload in three-phase installations
  • Checking for under voltage in electrical installations
  • Monitoring liquid flow


Physical Installation

  • Plastic Case: IP23
  • Installation: DIN
  • Design: Industrial, IT

Operation Schematic

PWR 3/12/25 Installation

The HWg-PWR12 device monitors energy consumption using standard external energy meters. The devices can monitor a range of electricity, water and gas meters from different manufacturers.

The advantages of using third-party MODBUS meters:

  • Wide range of meters using the EN13757 (M-Bus) interface available. It is easy to use special-purpose meters (non-standard form factor or measurement range e.g. indirect electricity meters rated up to 1000A).
  • M-Bus meters frequently provide extended information e.g. total consumption and immediate values, voltage at different phases and power factor.
  • Values from certified meters can be used for billing purposes.