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Dent Instruments TOUCT-4G Time Of Use CT Logger

Time of Use (TOU) CT Data Logger w/ External Current Transformer

Dent Instruments SMARTloggerâ„¢ Monitors Electrical Loads Generating 0.25 Amps or Greater

Part Number: TOUCT-4G

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  • Monitor Time of Use or Run-Time of Motor Loads or any Electric Load Generating at Least 0.25 Amps

  • In the Field Set-up with no PC Required

  • Stores up to 32,000 Readings onto Non-Volatile Memory

  • Battery Powered with 5 Year User-Replaceable Battery

  • 1 Hz (1 Samples per Second) Sampling Rate

  • Includes Magnet, Battery and User Manual

Requires Windows 10, 7 Compatible SMARTware® Software for Data Analysis and Data Export

Limited Qty Available: 4


Dent Instruments TOUCT-4G CT Data Logger Specifications

Display 5 Digit LCD showing Logger Sensing, Total On-Time and Percent On Since Reset
Time Stamp Month, Day, Year, Hour, Minute, Second
Sampling Rate 1 per Second (1 Hz)
Sensitivity Maximum: 16 Amps
Minimum: 0.25 Amps
Data Analysis Statistics (Min, Max and Average), Summaries, Graphs and Data Export using SMARTware™
Data Storage Capacity 32,000 Readings/Samples
Ring Memory Plus Separate On-Time Totalizer
Time Resolution 1 Second
Operating Environment Temperature: 0°C to 60°C (32°F to 140°F)
Humidity: 5% to 95% RH, non-condensing
Communication USB with SMARTlogger Communications Cable
Internal Clock Real-time, Crystal controlled, true calendar, 20 ppm accuracy (<1 min/month); 30 ppm Max
Power Battery (User-Replaceable)
Battery Life 5 Years
Mounting Hook and Loop Strip or Mounting Hole
Software Compatibility Windows 8, 7 (32 or 64 Bit), Vista (32 or 64 Bit) and XP
Dimensions 64mm x 38mm x 19mm (2.5" x 1.5" x 0.75")
Weight 40 grams (2.0 oz)

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  • Answer:

    This logger will work for your application.  It can be set up to tell you min, max, or average run time with a time date stamp.  The logger can store up to 32k readings.  The total time it can record for will depend on how frequently the pump experiences a state change.  Each time it turns on and off will use two data points, again the maximum is 32k.   

    The external CT that this logger comes with must be clamped around a single power leg.  If you are using a standard AC cord you will need to split the line using an accessory like this one:



    This logger also requires that you purchase a communication and software kit which is available here:



    Another simpler option I would recommend looking at is the UX90-001 from Onset.



    This logger can be attached to the compressor motor via strong magnets and sense when the motor is on by its magnetic field.   The logger works with software that is available as a free download.

    It can be programed to record state (on/off), Event (number of times), and Run Time.  Optionally you can purchase an external CT to use it like the Dent model but most customers don't find it necessary.  It's available in two versions, one that can store 84,650 readings and another that can store up to 346,795 readings.  Like the Dent, the total record time will depend the frequency of state changes but for this logger you can also adjust the sample rate so that will add into the equation as well.  Whereas the Dent is fixed at checking once per second this logger can be set up to check at the same once per second but also slower if you want to conserve memory. 

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