Part Number - CX403

InTemp Bluetooth Ambient Temperature Data Logger

$129.00 USD
Wireless, NIST-certified temperature data logger with internal sensor
InTemp App
InTemp Connect
InTemp Verify
CX Gateway


Compare all CX400 Data Loggers

Compatible with

InTemp App


The InTemp CX403 data logger features an internal sensor for monitoring ambient temperature. The logger communicates wirelessly via Bluetooth to mobile devices. The CX403 features a built-in LCD display to view ambient temperature, advanced audible and visual alarm capabilities for notification of temperature excursions, and a NIST Certification of Calibration.

With the optional CX Gateway, you can get remote notifications of temperature excursions and automatically download data from loggers within range of the device. Learn more about the CX Gateway.


Who is this for?

Required to follow GDP & GMP requirements specifically

  • Internal sensor only (No probe)
  • GDP/GMP compliant
  • Refrigerated to ambient monitoring
  • Integrates with mobile and cloud platforms for a 21 CFR Part 11 compliant solution
  • Easy-to-read display with current and daily min/max temperatures
  • Bluetooth transmission of data and alarm states
  • Logger setup and download of data in seconds – without a PC or cable
  • Real-time alerts and automatic data downloads with optional CX Gateway device
  • +/- 0.5C accuracy for reliable temperature readings
  • Battery-powered to guard against local power loss
Country of Origin
United States


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°
0.024°C at 25°C
0.04°F at 77°F
NIST Calibration
Single point NIST calibration


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
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
CE Compliance Mark
FCC Compliance Mark
Australia New Zealand Compliance Mark
Japanese Telecom Compliance Mark

Passed RTCA DO160G, part 21H


InTemp CX Temperature Logger (CX40x) Manual

InTemp CX400 series loggers measure temperature in indoor monitoring applications.

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Quick Start for the InTemp CX Temperature Logger (CX40x)

A quick start guide on how to set-up, configure, start, and deploy your CX400 series logger.

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InTemp System User’s Guide

CX series loggers, the InTemp® app, and InTempConnect™ web-based software work together to form the InTemp temperature monitoring solution.

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