Marathon 3CTEMP-USB RTD2 Temperature Logger with 90° bent 5" probe

  • Part #:MA0261-BP
  • Weight:33 grams / 1.16 oz.
  • Dimensions:6.5 cm(l) x 3.4 cm(w) x 0.9 cm (h) / 2.5 in.(l) x 1.3 in (w) x .35 in.(h)
  • Availability: In Stock

Price: $325.05
Price: $438.82


The 3CTEMP-USB-RTD2 is a reliable and cost-effective digital temperature recorder for all industrial and commercial applications. It has one sensor for ambient temperatures inside the case, and one external 90° bent 5" RTD stainless-steel probe that monitors temperatures from -29°C (-20°F) up to +380°C (+716°F). It is ideal for monitoring all of your high temperature needs. These high-precision laboratory-grade products will operate up to 1.5 years without a battery change. The LCD display provides real time viewing of ambient and probe temperatures prior to downloading to a computer. The dataloggers are NIST-Traceable and come with Certificates of Conformance.

Features & Specifications:

8k memory (approximately 8,000 measurements)
Ambient Temperature sensor (inside case): 
Wired chip in glass thermistor
Internal Logger Temperature Range: 
-29°C to +72°C / -20°F to +161°F
Internal Logger Temperature Accuracy: 
±0.2°C at 0° to 10°C, ±1.0°C at extremes / ±0.4°F at 32° to 50°F, ±1.8°F at extremes.
0.1°C / 0.18°F
External High Temperature: 
90° bent 5" RTD Sensor/Probe
External RTD Temperature Range: 
-29C to +380C (-20F to +716F)
External RTD Accuracy: 
+-0.5°C at 0 to +30C, +/- 2.0C at extremes (+/- 0.36F at 32 to 86F, +/- 3.6F at extremes)
Probe Resolution: 
0.1°C / 0.18°F

LCD screen

9.45cm(l) x 7.9cm(w) / 3.72in(l) x 3.1in(w)

IP66 rated
Internal Firmware, Internal Clock Accuracy: 
Internal Clock, Start/Stop time, Interval, User description, Alarm values, Recording status, Firmware version, Serial number, Model. Clock Accuracy is better than 2 minutes per month on average at normal temperatures (-29°C to +72°C). For loggers directly exposed to temperatures at or below -80°C, the expected accuracy is ±15 minutes per month
Measurement Intervals: 
Programmable from 2 seconds per reading. See Duration Chart for examples.
Computer Interface (physical): 
Data Retrieval Method:
Download to PC using a compatible cable and software
Power Source, Battery Life and Replacement: 
One CR2450 Battery. 1 year operating life, and 3 year shelf life

Note: For 3CTEMP-USB-RTD2 NFC models only!!

NFC App Download for Android phone: NFC Android Phone App

**Note: App download is only compatible with Android smart phones**

Required Accessories

The MaxiThermal2 Software allows you to view up to 8 multiple traces at one time, enables you to tra (more...)

Part #: MA0504
$15.00 (USD)
$20.25 (CAD)
USB interface allows you do connect to the Marathon USB dataloggers.

Optional Accessories

The Scigiene Calibration Lab provides a N.I.S.T. traceable certification and calibration service for (more...)