ONSET HOBO InTemp CX603 Dry Ice Data Logger

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.

  • Product Name:Dry Ice Data Logger
  • Model:CX603
  • Maunufactor:Onset
  • Country:USA

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.

Highlighted Features:

  • IATA Battery compliant

  • 3-Point NIST Certificate of Calibration, valid for one year from date of purchase

  • Anti-cut sheath

  • Integrates with mobile and cloud platforms for a 21CFR Part 11 compliant solution

  • Compact and lightweight – ideal for shipping pharmaceuticals

  • No need to open containers to access data

  • Ensures secure data via encrypted technology

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)

Drift:<0.1°C (0.18°F) per year

Response Time:1 minute 30 seconds typical to 90% in open air moving 1 m/s, unmounted

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


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:90 days

Shelf Life:Up to 1 year

Logging Rate:1 second to 18 hours

Time Accuracy:±1 minute per month at 25°C (77°F)

Battery:CR2450 3V lithium, not replaceable. Battery for CX602 and CX702 models lasts for duration specified when logger is used within the 1-year shelf life. Battery life for the CX603 and CX703 models is 1 year, typical with logging interval of 1 minute. Faster logging intervals, remaining connected with the InTemp app, excessive downloads, and paging may impact battery life.

Memory:16,000 measurements 

Full Memory Download Time:Approximately 30 seconds; may take longer the farther the device is from the logger

Dimensions:6.9 x 4.5 x 1.1 cm (2.71 x 1.76 x 0.42 inches)

Weight:25.5 g (0.90 oz)

Environmental Rating:IP65


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

Passed RTCA DO160G, part 21H