Owl 100 - Temperature - Water Resistant POLY | Single-channel Internal Temperature Data Logger | ACR Systems
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Owl 100 - Temperature - Water Resistant POLY

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Single-channel Internal Temperature Data Logger
Owl 100 - Temperature - Water Resistant POLY

Single channel, 8 bit, 32 KB data logger (One ambient temperature channel - water resistant enclosure).


The OWL 100 data logger records temperature in environments that typical data loggers cannot withstand. This model is also available in a water-resistant polyurethane enclosure (OWL-100 POLY) so it can be used in hostile environments where vibration or excess moisture is present.

Our OWL Series consists of configurable, single-channel data loggers with flashing visual alarms, optical data transfer, and an industry-leading 10-year battery life.

Key Features

  • One channel with options to record temperature, electric current, voltage, or process current
  • 32KB memory for almost 33,000 readings
  • Configurable alarm thresholds and modes with super-bright red blinking annunciator  
  • Conformal coating protects electronics from harsh environments
  • Industry-leading 10-year battery life
  • 3-year warranty


Size 60 x 48 x 19 mm (2.4 x 1.9 x 0.7 in)
Weight 54 g / 1.9 oz (All models except OWL 100-Poly)
80 g / 2.8 oz (OWL 100-Poly water-resistant model)
Case Material Noryl® plastic (All models except OWL 100-Poly)
Polyurethane (OWL 100-Poly water-resistant model)
Operating Limits -40 to 70°C (-40 to 158°F) and 0 to 95% RH (non-condensing) except OWL 100-Poly
Clock Accuracy +/- 2 seconds per day
Battery 3.6 volt Lithium
Memory Size 32 KB (32,767 readings)
Sampling Method Continuous (First-in, First-out)*, Stop When Full (Fill-then-stop)
*Not available for sample rates faster than 8 seconds
Sampling Rate User selectable rates from 5 per second to once every 12 hours
Resolution 8-bit (1 part in 256)
Communication Optical data transfer; data can be transmitted through glass or transparent medium up to 25 mm (1in)
Alarm Type Flashes red LED once every 8 seconds
PC Requirements Windows PC with a least 256MB RAM, 250MB of hard drive space and one free serial or USB port
Software Requirements TrendReader® (compatible with Windows 7, Windows 8 & Windows 10)
Memory Size 32 KB
Total Accuracy +/- 0.5°C @ 25°C (0.9°F @ 77°F)
(Can be increased by using narrow range feature)
Standard Resolution 0.5°C (0.9°F) at 25°C (77°F); better than 1°C (1.8°F) between -25 and 70°C (-13 and 158° F); better than 2.0°C (3.6°F) between -40 and -25°C (-40 and -13°F)
(Can be increased by using narrow range feature)
Submergence Rating
(OWL 100-Poly only)
IP67: 1m in fresh water for 30 minutes