InTemp Bluetooth Low Energy Temperature (with Probe) Data Logger (CX402-TxM)

Lead Time: 3-4 Days
Starting Price
2m Temperature Probe ($149.00)
4m Temperature Probe ($159.00)

Measurements: Temperature
Software: InTemp App and InTempConnect

InTemp ® CX402-TXM (with Probe only) data loggers monitor temperatures in refrigerators, freezers, and other temperature-controlled environments to comply with global GDP requirements. The loggers communicate wirelessly via Bluetooth Low Energy to mobile devices. Using the InTemp app, you can easily view data, check logger status, set alarms, and create and share secure PDF reports for streamlined reporting and regulatory compliance. All loggers feature a built-in LCD display to view current and daily min and max temperatures, advanced audible and visual alarm capabilities for notification of temperature excursions, an internal sensor for ambient temperature monitoring, and a single-point NIST Certification of Calibration for both the logger body and probe.

Models are available with a 2- or 4-meter external temperature probe for tracking actual refrigerator temperatures without Glycol buffers or freezer applications.

Highlighted Features:
  • Easy-to-read display with current and daily min/max temperatures
  • Audible and visual alarms
  • Bluetooth transmission of data and alarm states
  • Logger setup and download of data in seconds – without a PC or cable
  • +/- 0.5C accuracy for reliable temperature readings
  • Battery-powered to guard against local power loss
  • NIST Certificate of Calibration

To see the full specifications for this product, please see our product manual found under the documentation tab if available.



Radio Power

1 mW (0 dBm)

Transmission Range

Approximately 30.5 m (100 ft) line-of-sight

Wireless Data Standard

Bluetooth Low Energy (Bluetooth Smart)

Logger Operating Range

-30° to 70°C (-22° to 158°F), 0 to 95% RH (non-condensing)

Logging Rate

1 second to 18 hours

Time Accuracy

±1 minute per month at 25°C (77°F)

Battery Type

Two AAA 1.5 V alkaline or lithium batteries, user-replaceable

Battery Life

1 year, typical with logging interval of 1 minute. Faster logging intervals, remaining connected with the InTemp app, excessive report generation, numerous audible alarms, and paging all impact battery life.


128 KB (84,650 measurements, maximum)

Full Memory Download Time

Approximately 60 seconds; may take longer the farther the device is from the logger


LCD is visible from 0° to 50°C (32° to 122°F); the LCD may react slowly or go blank in temperatures outside this range


9.4 x 4.5 x 2.59 cm (3.7 x 1.77 x 1.02 inches)


90.2 g (3.18 oz)

Environmental Rating



The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).



External Temperature Probe


-40° to 100°C (-40° to 212°F)


±0.5°C from -15° to 80°C (±0.9°F from 5° to 176°F)
±1.0°C from -40° to -15°C (±1.8°F from -40° to 5°F)
±0.7°C from 80° to 100°C (±1.3°F from 176° to 212°F)


0.024°C at 25°C (0.04°F at 77°F)


<0.1°C (0.18°F) per year

Response Time

With 5 mL bottle: 10 minutes typical to 90% in air moving 1 m/s
With 15 mL bottle: 20 minutes typical to 90% in air moving 1 m/s
With 30 mL bottle: 25 minutes typical to 90% in air moving 1 m/s

Cable Length

2 or 4 meter (6.56 or 13.12 feet) flat ribbon cable



Ambient Temperature Sensor


-30° to 70°C (-22° to 158°F)


±0.5°C from -15° to 70°C (±0.9°F from 5° to 158°F)
±1.0°C from -30° to -15°C (±1.8°F from -22° to 5°F)


0.024°C at 25°C (0.04°F at 77°F)


<0.1°C (0.18°F) per year

Response Time

15 minutes typical to 90% in air moving 1 m/s