Tinytag Ultra RH/Temp Data Logger

TinyTag Ultra units are trusted by museums worldwide, offering reliability and ease of use. These data loggers are the perfect solution to monitoring the environment in Museums, Archives and Libraries in repositories, display cases, shipping and storage. Can be used outdoors using the instrument shelter (see accessories to fit below).

  • Built-in temp/RH sensor
  • 32,000 reading capacity
  • Delayed start option
  • User-replaceable battery & low battery monitor
  • Splash-proof case (IP53)
  • High reading resolution
  • Fast data offload
  • User-programmable alarms
  • TinyTag Model No. TGU-4500
We recommend that the relative humidity channel should be checked once every six months, and the temperature channel annually, against a calibrated reference meter. Recalibration is available on request, please contact us for details.

Accessories required (See below to purchase):

  • Windows Software - 9903-0009, and USB cable 9903-USBC.

See 'Specification' tab below for more details.

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Tinytag Ultra RH/Temp Data Logger
P9903-1500 9903-1500
Pack Size: Each Price: £106.00 ex VAT In Stock
Accessories to fit P9903-1500 9903-1500
Tinytag Service Kit
P9903-9500 9903-9500
Pack Size: Each Price: £5.50 ex VAT In Stock
Tinytag Explorer Software For Windows
P9903-0009 9903-0009
Pack Size: Each Price: £49.00 ex VAT In Stock
Tinytag USB Cable
P9903-USBC 9903-USBC
Pack Size: Each Price: £20.00 ex VAT In Stock
Outdoor Data Logger Cover
P9903-5050 9903-5050
Pack Size: Each Price: £41.00 ex VAT Low Stock
Datalogger PC Cable for Tiny Tag and View (not USB)
P9903-0007 9903-0007
Pack Size: Each Price: £5.00 ex VAT Out Of Stock - Notify when back in stock
Calibration Certificate Single (Temp or RH) Channel Tinytag/Tinytalk
P9901-9000 9901-9000
Pack Size: Each Price: Call Made to Order
Calibration Certificate Dual (Temp & RH) Channel Tinytag/Tinytalk
P9901-9002 9901-9002
Pack Size: Each Price: Call Made to Order

TinyTag Model Number TGU-4500

  • Total Reading Capacity 32,000 readings
  • Delayed Start Relative / Absolute (up to 45 days)
  • Stop Options When full, After n Readings, Never (overwrite oldest data)
  • Reading Types Actual, Min, Max
  • Logging Interval 1 sec to 10 days
  • Alarms 2 fully programmable; latchable


  • Reading Range -25°C to +85°C (-13°F to +185°F)
  • Reading Resolution 0.01°C or better
  • Relative Humidity
  • Reading Range 0% to 95% RH
  • Sensor Type Capacitive
  • Accuracy ±3.0% RH at 25°C / 77°F
  • Reading Resolution Better than 0.3% RH
  • IP Rating IP53 splash proof (see notes)
  • Operational Range* -40°C to +85°C (-40°F to +185°F)

    Case Dimensions

  • Height 72mm / 2.83”
  • Width 60mm / 2.36”
  • Depth 33mm / 1.30”
  • Weight 55g / 1.94oz

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