Dry Ice, Ultra Low Temperature data logger for critical applications

CX500, CX600 and CX700 series temperature data loggers measure and record temperature from ultra-low to room temperatures of pharmaceuticals, life sciences, hospitals and clinics.

CX603 Dry Ice data loggerCold Chain monitoring is already a very complex process. Adding the monitoring of vaccines being developed in response to the world-wide pandemic will be one of the greatest challenges ever faced by global supply chain contributors.

The InTemp CX603 Dry Ice data logger is a Bluetooth Low Energy (BLE)-enabled multiple-use logger that records temperature data for up to 365 days. The CX603’s built-in 1.5m probe measures temperatures as low as -95°C (-139°F) and includes a protective sheath to prevent accidental cutting of the cable, and a clip for secure mounting.

Using the InTemp® app on your mobile device, you can easily configure the CX603 with one of multiple preset configurations, or set up a custom configuration. The logger has a built-in alarm to alert you to excursions. And logger reports can be quickly downloaded to your phone or tablet and uploaded to an InTempConnect® account, where you can analyze and export data as needed.

With the optional CX Gateway, you can get real-time notification of temperature excursions and automatically download data from loggers within range of the device. Learn more about the CX Gateway here.

Key Features
  • IATA Battery compliant
  • Designed to meet the increased demands for cold chain visibility and automation
  • Combines Bluetooth data loggers with the InTemp app and CX5000 gateways for automated programming, downloads, reporting, and alerts
  • “Touchless” solutions
  • 3-Point NIST Certificate of Calibration, valid for one year from date of purchase
  • 21 CFR Part 11 compliant apps and cloud software
  • Manufactured by Onset, the trusted source for accurate and reliable data loggers for nearly 40 years


Temperature Probe
Sensor Range -95° to 50°C (-139° to 122°F)

±1.5°C from -95° to -40°C (±2.7°F from -139° to -40°F)

±1.0°C from -40° to -10°C (±1.8°F from -40° to 14°F)

±0.5°C from -10° to 50°C (±0.9°F from -14° to 122°F)

Resolution 0.013°C at 25°C (0.023°F at 77°F)
NIST Calibration Three-point NIST calibration, probe only
Cable Length 1.5 m (4.92 ft)
Probe Dimensions Food-grade stainless steel probe with blunt tip, 31.75 mm (1.25 inches) long, 4.78 mm (0.188 inches) diameter
Data Logger
Logger Operating Range -30° to 50°C (-22° to 122°F)
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)
Type Multiple use
Duration 365 days
Shelf Life Up to 1 year
Logging Rate 1 second to 18 hours
Battery CR2450 3V lithium, not replaceable
Memory 16,000 measurements
Full Memory Download Time Approximately 30 seconds; may take longer the farther the device is from the logger
Weight 25.5 g (0.90 oz)
Dimensions 6.9 x 4.5 x 1.1 cm (2.71 x 1.76 x 0.42 inches)
Environmental Rating IP65
CE Compliant The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).