The Minnow logger is the most compact  logger offering from Senonics measuring.

The Minnow logger is commonly used in transport applications including but not limited to transport of:

  • SENSITIVE/FRAGILE ITEMS
  • FOODANIMAL/LIVESTOCK
  • PLANTS
  • CHEMICAL
  • MEDICINES

Suppose for example you would like to transport some delicate or fragile cargo from one location to another. By attachment of a Minnow logger one can record temperature and humidity conditions during the journey. At the destination you can then extract the logged data using a very simple PC application and see graphically or in raw data format the changes in environment over time.

Overview
Temperature and Humidity Measurement

The Minnow offers accurate and repeatable logging for temperature. Temperature is measured to an accuracy of +/–0.3C over the range +5C to +60C and +/–2.0C over the full range –30C to +80C.  Temperature  is logged at a user configurable logging rate which can be set in a PC application program.

NIST Traceable Calibration

The Minnow is available with an optional NIST traceable single point calibration at any temperature between 15C and 35C or 0C. Once calibrated the Minnow is accurate to +/– 0.1C within +/– 20C of the calibration point.

Alarms

When you would like to guarantee that items are transported within particular environmental limits then one can also set operating ranges above or below which light indicators will be activated so that the user can become aware that the desired transportation conditions have been exceeded.

Logging Storage

The Minnow logger is equipped with the largest logging memory when compared with comparable portable logging devices currently available. The Minnow logger has provision for an impressive 65520 storage items each of which is a time-stamped recording of temperature and humidity.

Device ID & Data Security

The Minnow logger enables each device to have a 16 character name. This can be helpful when the user has multiple logging devices and one would like to distinguish between them for example based on location. Logging data may also be password protected so that data may only be retrieved from the device by supplying a user supplied password.

Long Battery Life

The Minnow logger runs from a single CR2450 coin cell better available from supermarkets or online battery stores over the internet. The logger can log temperature and relative humidity for up to 4 years.

Simple to use PC Application

The Minnow logger comes with a very easy to use PC application. The application is used for configuration of the logger, extraction of logger data, graphically viewing of logging data, spread sheet analysis of logging data and saving of logging data to file (typically in comma separated value CSV file format) for third party applications such as Microsoft Excel. The graphical user interface is completely intuitive in terms of configuring new devices and extracting logging data from a field device. When the user has multiple devices requiring the same setup then one can preload the application with a logger setup from a saved configuration file to help expedite the process and ensure all loggers get setup identically. The application does not require any driver installations to connect to your logging device. Just download the program from our home page, run it and then plug in you device. As simple as that! Currently the PC application is available for Windows XP, Vista, Windows 7 and Windows 8. It is also supported on Mac.

PC Application

Look and Feel

The Minnow logger design is compact, elegant and simple. Care has been taken to ensure the design is stylish and only makes available buttons, indicators and connectors which are intuitive and uncomplicated. The Minnow logger has a handy key ring attachment for easy transportation.

Moisture Resistance

Every logger circuit board assembly is epoxy coated to protect the device from wet and condensing enviroments.

Senonics Guarantee

Senonics logger products are developed by world class engineering teams situated in Denmark and United States. Senonics engineers are very proud of the Minnow logger range which is marked by their special design philosophy of ensuring both a feature rich product but simple for the end user. Senonics designers have a well-deserved reputation for high quality product design ensuring that your logging device will both last the years and exceed your logging requirements!

Specifications

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    Temperature range                                                            -30C to +80C

    Temperature accuracy [if calibrated]                               +/– 0.1C [within 5C of calibration point]

    Temperature accuracy [+5C to 60C]                               +/– 0.3C

    Temperature accuracy [–30C to +80C]                            see temperature accuracy plot

    Temperature resolution                                                   0.01C

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               Temperature alarm

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               Battery                                                                         CR2540 coin cell

    Battery life                                                                    up to 4 years logging

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               Physical size                                                                 35mm x 60mm x 15mm

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               PC application available on Windows XP, Vista,

Windows 7 and Windows 8. Also Mac PC.

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               Logger identifier                                                            16 characters

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               Logging space                                                              65520 temp/humidity pairs

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Accuracy

Software
PC Application

The Minnow Logger comes with a very easy to use PC application. The application is used for configuration of logger, extraction of logger data, graphically viewing of logging data, spread sheet analysis of logging data and saving of logging data to file (typically in comma separated value CSV file format) for third party applications such as Excel.

The graphical user interface is completely intuitive in terms of configuring new devices and extracting logging data from a field device. When the user has multiple devices requiring the same setup then one can preload the application with a logger setup from a saved configuration file to help expedite the process and ensure all loggers get setup identically.

The application does not require any driver installations to connect to your logging device. Just download the program from our home page, run it and then plug in you device. Simple as that!

Currently the PC application is available on Windows XP, Vista, Windows 7 and Windows 8. We also support Mac PCs. For installation of this application go to the downloads page or the support page.

PC Application
Downloads
Online Documentation

The following documents are provided to give more technical details about the Minnow Logger:

Minnow Product Overview

Minnow Quick Reference Guide

Minnow Full User Guide

Minnow Battery Install

Software Downloads

Click here to install the latest version of the Senonics PC Application program for Windows XP, Vista, Windows 7 or Windows 8.

Install Senonics Application (Windows version)

Click here to install the latest version of the Senonics PC Application program for Mac.

Install Senonics Application (Mac version)

NIST
NIST Calibration

The Minnow is available with an optional NIST traceable single point calibration at any temperature between 15C and 35C or 0C. Once calibrated the Minnow is accurate to +/– 0.1C within +/– 20C of the calibration point. Documentation will be provided that traces the calibration back to a NIST tested reference thermostat.

Senonics designs and manufactures it’s own thermoelectric reference chambers that are stable to +/– 0.03C over four hour time period. Every calibrated logger is tested at the desired temperature for four hours to determine its offset from the reference temperature. Once the difference is determined an offset is applied to the logger and then the logger is retested to verify it’s performance. All test results are documented in the NIST report.

Senonics guarantees the accuracy of the Minnow for one year from the date of calibration.

The Minnow logger can be recalibrated if needed. Please contact us for further details.

FAQ
1. Why should I buy a Senonics Minnow Logger?

The Senonics Minnow Logger has five selling points which sets it apart from other loggers:
1) The logger is likely the most compact temperature humidity logger around (35mm x 60mm x 15mm)
2) The logger is low cost (only US$79 per unit)
3) The logger has free software for configuration and data extraction
4) The logger requires no special programming pods – just a standard USB cable
5) The logger has a logging depth which surpasses rival loggers – 65520 sample depth (temp, humidity pair)

2. What is the difference between Minnow 1.0TH and Minnow 1.0T?

The Minnow 1.0TH is a temperature and humidity logger. Minnow 1.0T only logs temperature. Otherwise the loggers have exactly the same features – for example accuracy, logging depth, PC Application software etc.

3. What are the maximum logger durations for Minnow 1.0TH and Minnow 1.0T?

This will depend on the logging interval:
1 second interval / 10 hours logging
10 seconds interval / 7 days logging
30 seconds interval / 22 days logging
1 minute interval / 45 days logging
10 minutes interval / 1.2 years logging
30 minutes interval / 3.7 years logging
1 hour interval / 7.5 years logging (or until battery is flat)

4. Do we need to by anything other than the Minnow logger?

No! Purchase of the logger includes the logger itself, a USB cable and a coin cell battery. The software to configure the logger and extract data is free and installed from the Web. There is no special purpose programming pods or cables for our product. Everything is simple.

5. What is the preferred battery to use with my Minnow logger?

We recommend a CR2450 620mAH Coin cell battery. There are different manufacturers but a good one is Panasonic CR-2450/G1AN. You can find it easily on the web from different places such as www.digikey.com, www2.mouser.com and probably in your local supermarket. The key thing is to choose a CR2450 battery with high capacity since this will translate into a longer logger battery life.

6. What is the response time for the Minnow logger for changes in temperature and humidity?

The Minnow logger has high quality sensors and due to careful mechanical design is quite responsive. Usually we see a settling time of about 4 minutes for temperature and humidity changes.

7. How do I know if my logger is logging?

When logging the logger will flash the green status LED every 6 seconds. When the logger finishes logging or is turned off then the status LED is permanently off.

8. Can I synchronise multiple loggers?

Yes! If you use the “Start at Specified Time” mode in the configuration and use the same future time for different loggers then they will all start logging together. Try it.

9. What is the Real Time Logging Mode?

Your Senonics Minnow Logger can run in a mode where it is connected to the logger and the PC application instructs the logger to collect samples continuously at a desired rate. One can then see the samples collected as a table and graphically (live). This is a mode in addition to the regular logging modes and is a feature not supported by other loggers.

10. What version of Windows is supported?

The logger is a HID USB device which means it needs no special driver installed. It uses the driver included in Windows. Because of this the PC software can run on Windows XP, Vista, Windows 7 and Windows 8 in 32 or 64 bit and can be plugged into any USB port on the PC.

11. What options are there for post processing data from the logger?

The data extracted from the logger can be exported as a comma separated value (CSV) file. This is a standard text file format which can be readily processed by many third party programs such as Microsoft Excel, MatLab etc.

12. My PC does not seem to interpret the Senonics CSV format properly?

The CSV file format made by the Senonics PC application has been made to suite USA comma separated format. Usually this file can be opened directly within Excel.

On some PCs and in some countries this will not be interpreted correctly. Instead use the Senonics PC application to write the file with a .txt extension. Next open Excel and open the .txt file. You will be asked how to interpret the CSV file. Ensure that you select the “comma” delimiting. The file will then be interpreted correctly.

13. How come I can not log more data after I have connected my logger previously in “scheduled start” mode?

When one has used scheduled start and the logger is then connected, logging will be immediately stopped. One may then retrieve the logged data. Unfortunately in this logging mode there is no way to restart the logging without reconfiguring the logger and therefore wiping the data. So you do not loose data but you can not add to the data.

In both logging on disconnection mode and logging on button press it is possible to restart logging when the logger is disconnected and new data is added to the old.

14. Have I got a bad USB cable?

At Senonics we are continually trying to improve the quality of our suppliers. There have been some very infrequent cases in the early days where there was a problem of connection to the Minnow logger attributed to a poor USB cable. We have since changed to a new supplier of USB cable but if you suspect a similar problem then please try to connect with a new cable and see if you still see the problem.

15. How long does it take to ship my logger once I have placed an order?

We endeavour to have all logger products in stock at all times. We ship with Fedex, DHL or UPS transport and the estimated time is 2 days world-wide.

16. Does Senonics make custom logger products?

Senonics is always keen to learn about customers needs and in some cases there could be a cooperative project which results in a custom logger product or setup. Contact us if you have suggestions to our products or some specific application in mind.