Nautilus 135 | Single-Channel Waterproof High Temperature Data Logger | ACR Systems
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Nautilus 135

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Single-Channel Waterproof High Temperature Data Logger
Nautilus 135 - Aluminum (01-0263)

Single channel, 8 bit, 32 KB data logger (One 135°C (275°F) temperature channel - extreme environmental and pressure resistant aluminum enclosure).

* 21-0070 - Replacement "O" Ring for use with the following fluids: Alcohols, Brake Fluids, Refrigerants, Steam

NOT FOR USE WITH: Petroleum Oils, Diester Lubricants


The high temperature capabilities of the Nautilus135 make it the ideal logger for monitoring temperature in extreme environments or environments where conventional data loggers are not able to survive.

The Nautilus Series consists of two full-featured, single-channel temperature loggers designed for "wet" environments at varying temperature ranges - from oceans, streams, and wastewater to food and other liquids, Ideal for rugged applictions, Nautilus loggers come in stainless steel or aluminum and offer a high temperature option for environments where conventional loggers are unable to survive

Key Features

  • Widest temperature range supported across series (-40°C to 135°C or -40°F to 275°F)
  • 32KB memory for up to 244,800 readings with data compression
  • Compact, cylindrical design for the narrowest applications (e.g. in bottles)
  • Lightweight with stainless steel and aluminum case material options
  • 3 to 10-year battery life (depending on model)
  • 3-year warranty


Size 18 mm x 127 mm (0.71" x 5.00")
Weight Aluminum case: 51 grams (1.8 ounces)
Stainless steel case: 112 grams (4 ounces)
Case Material Anodized aluminum or stainless steel
Operating Limits See individual specifications
Operating Pressure Range Up to 2000 PSI
Clock Accuracy +/- 2 seconds per day
Battery 3.6 volt Lithium, 0.95 Amp-Hour
Power Consumption 5 to 10 microamps (continuous)
Battery Life See individual specifications
Mounting Locking hole on cap
Memory Size 32 KB (up to 244,800 readings with data compression)
Sampling Methods 1. Continuous (First-in, First-out)
2. Stop when full (Fill-then-stop)
(Option to delay start)
Sampling Rates User selectable from 8 seconds to 34 minutes
Readings stored to memory can be spot or averaged over the sample interval (except for the 8 second interval)
Resolution 8-bit (1 part in 256)
PC Requirements Windows PC with a least 256MB RAM, 250MB of hard drive space and one free serial or USB port
Software Requirements TrendReader® Express or TrendReader® (compatible with Windows 7, Windows 8 & Windows 10)
Temperature Range 10°C to 135°C (50 to 275°F)
Sensor Accuracy +/- 0.5°C (+/- 0.9°F)
Sensor Type Negative temperature Coefficient (NTC) Thermistor
10,000 ohms @ 25°C (77°F)