Chauvin Arnoux CA1821 Single-Channel Contact Thermometer

  • Measures surface, air or liquid temperature via thermocouple (E, J, K, N, R, S, T)
  • Minimum reading of -250˚C and maximum of 1767˚C
  • Large internal memory suitable for spot and pre-programmed measurement
More Info
inc VAT £162.00 ex VAT £135.00
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Product Details

Chauvin Arnoux CA1821 Single-Channel Contact Thermometer

The Chauvin Arnoux CA1821 Single-Channel Contact Thermometer is compatible with a wide range of different contact thermocouples (type E, J, K, N, R, S, T) which allows it to measure air, liquid and surface temperature. It has a minimum temperature reading of -250˚C and a maximum temperature reading of 1767˚C (range depends on probe type). Readings are always given to 0.1˚C below 1000˚C and 1˚C above 1000˚C whilst accuracy varies between 0.1% and 0.2% depending on the probe and temperature level. Please note that no probes are included as standard with the thermometer.

The thermometer has a large backlit display that clearly shows the current temperature reading. The user can toggle between Celsius and Fahrenheit very easily and the Chauvin Arnoux CA1821 offers minimum/maximum recording and data hold. Operation is extremely easy thanks to the one-button-one-function principle and the internal memory has enough space for over 1 million values so it is suitable for long-term monitoring. It is possible to set defined alarm limits and instances where alarms are triggered will be saved to the memory. The user can take spot readings or use a programmed measurement schedule for monitoring.

The Chauvin Arnoux CA1821 has a battery life of 1000 hours in portable mode and up to three-years in long-term recording mode. The USB and wireless Bluetooth interfaces enable it to communicate results to a PC using freely available Data Logger Transfer software. Once downloaded, the software can be used to produce comprehensive reports. The casing is IP54 rated and the instrument is covered by a two-year warranty.

Chauvin Arnoux part number: P01654821

Key Features

  • Thermocouple compatibility: Type E, J, K, N, R, S, T
  • Minimum reading: -250˚C
  • Maximum reading: 1767˚C
  • Resolution: 0.1˚C/1˚C
  • Accuracy: ±0.1% to 0.2%
  • Min/max recording & data hold
  • Internal memory: 1,000,000 readings
  • Bluetooth/USB connection
  • Programmed or spot monitoring
  • 3-year long-term battery life
  • Two-year warranty
What's In The Box?
  • Chauvin Arnoux CA1821 Contact Thermocouple
  • Carry case
  • 3 x 1.5V AA batteries
  • USB cable
  • Test report
  • Quick start up guide

(Full manual and data transfer software available online from Chauvin Arnoux website)

More Information


  • Measurement range: J - 210 to + 1,200 °C / -346 to + 2,192 °F; K - 200 to + 1,372 °C / -328 to + 2,501 °F; T - 250 to + 400 °C / -418 to + 752 °F; N - 200 to + 1,300 °C / -328 to + 2,372 °F; E - 150 to + 950 °C / -238 to + 1,742 °F; R - 0 to + 1,767 °C / 32 to + 3,212 °F; S - 0 to + 1,767 °C / 32 to + 3,212 °F 
  • Resolution: ø < 1,000 °C : 0.1 °C and ø ≥ 1,000°C : 1 °C; ø < 1,000 °F : 0.1 °F and ø ≥ 1,000°F : 1 °F 
  • Intrinsic uncertainty: (J. K. T. N. E) ø ≤ - 100°C ± (0.2% Reading + 0.6°C)
  • -100°C < ø ≤ + 100°C ± (0.15% R + 0.6°C) + 100°C < ø ± (0.1% R + 0.6°C); (R. S) ø ≤ + 100°C ± (0.15% R + 1.0°C) + 100°C < ø ± (0.1% R + 1.0°C)


  • Recording: Manual start/stop on the product, short press on MEM: spot recording / Long press on REC: recording at the rate of the current mode; Programmed recording, start date, recording rate (interval from 1 minute to 2 hours) and end date can be customised with the PC software
  • Alarms: Alarm thresholds set using the software. Visual alert on the product in the event of an overrun Recording can be triggered on alarm thresholds 
  • Data storage: >1,000,000 values
  • Min/Max/Hold: Yes
  • Units: ˚C or ˚F
  • Backlighting: Yes
  • Auto power off: Yes (configurable)

Power Supply

  • Type: 3 x 1.5V AA / LR6 alkaline batteries; mains connection possible with the mains / micro USB adapter proposed as an accessory 
  • Battery life: : 1,000 hrs (portable mode); 3 years for recording (15-minute measurement interval)

Physical Specifications

  • Interfaces: Bluetooth/USB
  • Fixations: Casing equipped with a magnet, a wall-mount system and a slot for suspension of the product. Compatible with the Multi x accessory. Sheath available as an accessory.
  • Connections: Compensated miniature female connector
  • Dimensions: 150 x 72 x 32mm
  • Weight: 260g
  • Ingress protection: IP54
  • Product operating ranges: -10˚C to 60˚C; 10 to 95% RH

General Specifications

  • Data Logger Transfer Windows PC software functions: Display as a graph or a table of values / Data export in graph or Excel table form; Real-time mode / Automatic report generation in Word format / Data format compatible with the Dataview software offered as an accessory

  • Warranty: 2 years