Windmill Software

Data acquisition and control

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Special Offers

Free Serial Port Monitoring Software

Free ComDebug and Windmill 7 Trial: Serial port monitor & data logger

Subscribers to our Monitor newsletter can now download ComDebug data logging and serial trouble-shooting software for free. This is bundled with a free trial of the Windmill 7 data acquisition software suite.

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Enhanced Windmill

Enhanced Windmill

Get ALL the Windmill data acquisition and control programs and drivers for just £295!

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751: Multifunction Data Acquisition USB Unit

751 Multi-function USB Data Acquisition with Windmill Software: 16 analogue inputs, 32 digital i/o, 8 counters

Sale: Was 595 now just 295!

For 16 differential analogue inputs, 16 digital inputs/outputs and 8 counters. You can connect eight 751s to one PC. With the addition of suitable Microlink 59x conditioning units, you can also monitor thermocouples, strain gauges, pressure transducers and current. Includes Windmill data acquisition software for logging, charting, output control and direct data transfer to Excel.

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Best Sellers

Windmill + COMIML Serial Driver

Windmill 7 Data Acquisition Software + COMIML Serial Driver

Sale: Was 145 now just 50!

Collect data from 10 instruments via TCP/IP, RS232, RS485, Modbus, RS422. Save data in text files or send directly to Excel. Includes Logger, Chart and Control applications, and software to troubleshoot COM port communications. For a multitude of devices including laboratory balances, GPS, digital indicators, PICs...

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594: Strain Gauge Monitoring

Microlink 594 Strain Gauge Connection Box

Lets the 751, 752 and 851 data acquisition units monitor strain gauge bridges and balanced bridges such as pressure transducers. Also provides screw terminations to allow signals into the USB units to be permanently wired.

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851-SG: Strain Measurement over Ethernet and Internet

851-SG: Strain Data Logger with Digital I/O and Counting

Monitor 16 strain gauges, balanced bridges like pressure transducers and voltage signals; counting; digital input and output. With Windmill software, free technical support for life and a money-back guarantee. Communicates with the PC over TCP/IP (eg Ethernet and Internet).

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Windmill with the COMIML Serial Driver: logging from TCP/IP, RS232, RS485 & Modbus Instruments

DAQ Catalogue | Windmill Data Acquisition Software |  Windmill with the COMIML Serial Driver: logging from TCP/IP, RS232, RS485 & Modbus Instruments

Windmill 7 Data Acquisition Software + COMIML Serial Driver

Windmill 7 Data Acquisition Software + COMIML Serial Driver

Price: 50.00 (Excluding VAT at 20%)


Logging from TCP/IP, RS232, RS48, ModbusSale: Was 145 now just 50!

Read and control devices which connect to the PC's COM or Ethernet port and communicate over TCP/IP, RS232, RS422, RS485 or Modbus. These include such diverse equipment as electronic balances used in a laboratory, GPS receivers used in the field and data loggers used in process plant.

For just 50 you get logging, charting, display, analogue and digital control software applications, the universal serial driver and com port trouble-shooting software. You can also use other Windows software, like Excel or Access, to display and analyse the data in real-time.


  • Connect up to 10 devices
  • Log data: temperature, strain, pressure, position, voltage, current, flow, humidity, rainfall, concentration, weight, etc
  • Each reading time-stamped
  • Chart data in real-time
  • Switch digital outputs
  • Control analogue outputs
  • Alarm indication on all inputs
  • Data saved in text files - eg in csv format.
  • Route data into Excel, or other Windows software, in real-time
  • Add optional extras, such as process mimics
  • Free technical support for life by e-mail, fax or telephone
  • Money-back guarantee if not satisfied
  • Choose the logging rate: anything between once every 24 hours to 5 samples per second per channel.
  • Can log 200 samples per second from 40 or more channels
  • For instruments sending messages in ASCII, binary or hexadecimal
  • Troubleshoot serial communications: see all bytes sent and received, even non-printing characters like carriage returns
  • See the state of the com port input and output lines
  • For Windows 8, 7 64-bit and 32-biit, Vista, XP and 98

Truly Modular

Each Windmill program concentrates on doing a single job and you simply run as many programs as you need. You can run several copies of each program, which means there are no fixed limits to the size of a Windmill system. You can also add other drivers, for example to collect data from USB instruments.

Windmill chart recorder and data logger

The Windmill Chart and Logger programs

What sort of Instruments can you Read with Windmill and COMIML?

You can control both those serial devices that continuously output messages, and those that require commands before supplying data. With a flexible approach to building command strings, and parsing the received data strings to extract data values, the majority instruments are supported. These include altimeters, balances, conductivity meters, data loggers, dial guages, digital indicators, digital thermometers, DMR, extensometers, fluorometers, force gauges, gas analysers, GPS, gyro compasses, hygrometers, I2C devices, ion gauges, load meters, motion sensors, multimeters, myographs, oxygen electrodes, particle analysers, pH meters, PIC microcontrollers, plcs, pressure transmitters, power analysers, RFID readers, thermoregulators, titrators, solar panel array controllers, sonar and water baths.

You have the freedom to mix and match equipment from many different manufacturers in many combinations. For example, serial devices from A&D, Anton Paar, Ashtec, Bruël & Kjær, Dataq Instruments, Datel, Datataker, Denver, Desoutter, Ecom, Edge Tech, Electro Industries, Fisher, Furuno, Garmin, Horiba, Mettler Toledo, Microchip Technology, Motorola, Molyteck, Newmar, Nu-Metrics, Omnistar, Omron, Orion, Parallax, Paroscientific, Patton, Phytron, Quantum Logic, Quest Scientific, Sartorius, Siemens, Telegan, Telemecanique, Texas Instruments, Transcell and Turner Designs have all been handled by Windmill. Many channels of data can be accepted from each instrument.

Troubleshoot Serial Communications

Also included is the ComDebug software which lets you troubleshoot serial communications. It handles messages in both binary and ASCII formats. You can see all bytes sent and received, even non-printing characters like carriage returns. This is crucial when dealing with binary data. ComDebug also lets you see and set the state of the input and output lines to the computer's COM port. It can send 16-bit 2s complement integers, unsigned integers, single bits of data, floating point etc.

Customer Comments

Some of these comments are about an earlier version of the software

"This seems like the best, most versatile, and professional data acquisition/processing suite I have seen."
FK, Chalmers University of Technology

"I needed a software program that can automatically send the appropriate commands to the OBDII device; interpret the response and make it available through Dynamic Data Exchange (DDE). Searching around the internet I found Windmill...This program is perfect it can request specific data through the OBDII interface and serve the data readings onto Excel."
RK, Mechanical Engineer, US NAVY Department

"...resulting in a 90% improvement in efficiency in an inspection data logging operation"
RB, Manufacturing & Development Engineer, Fiber Optic Transceiver Manufacturing

"...I just finished settting up our Turner SCUFA Fluorometer with Windmill. Great software. It was very easy, Thanks!"
GL, University of the Pacific

"...I am using the software to log a EZ compass (tilt, roll and heading). Works great and saved me alot of programming."
KV, Physics Professor

"The Windmill software was a great find for me. I had feared that I would have to write my own software as I could not find a flexible program that could accept custom-made drivers."
JC, Program Manager of a pilot scale chemical process facility supporting development of new products and processes

Will Windmill work with my Hardware Device?

If you can answer Yes to these questions then Windmill will work for you.

  1. Can your instrument communicate either via the PC's COM port (virtual or real) over RS232, RS422, RS485 or Modbus protocol, or via TCP/IP - eg Ethernet or Internet?
  2. Does it send ASCII, binary or hexadecimal messages?
  3. Are you running Windows: any version from 95 to Windows 8?
  4. Does your instrument send its data in real-time?
  5. Is each data item fewer than 21 ASCII characters or 7 pairs of hexadecimal characters long (excluding engineering units, headers, etc. Eg +123456789.0123456789)?

DAQ Catalogue | Windmill Data Acquisition Software |  Windmill with the COMIML Serial Driver: logging from TCP/IP, RS232, RS485 & Modbus Instruments