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ACR OWL Temperature Data Loggers

ACR Systems – OWL 100 / 200

ACR OWL-100 and OWL-200 Single Channel Temperature Data Loggers

The OWL series of data loggers are Single-Channel, configurable 8-bit data loggers featuring a 10-year battery life, memory capacity of 32,767 readings, optical data transfer, and flashing visual alarm. OWL-100 has an internal temperature sensor, and OWL-200 has an external temperature channel.

Common Specs:

Size: 60 mm x 48 mm x 19 mm,
Weight: Non-watertight model; 54g, Watertight model (OWL 100); 80g,
Operating Limits: -40C to 70C,
Memory Size: 32,767 readings, User selectable sampling rates from 5 per second to once every 12 hours, 32K readings, 8-bit (1 part in 256), Can be optimized to the equivalent of 10 bit resolution,
Alarm Type: Red LED alarm,
Connector: Removable snap type connector.

FAQ on OWL Loggers

Also required:  Trendreader Software and USB Light Wand cable: see below

Note: The Trendreader Software is the same for Owl, SmartReader and SmartReaderPlus loggers, however the included communications cables are specific to the logger type.

ACR OWL Temperature Data Loggers

OWL 100 Single-Channel Internal Temperature Data Logger


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.
OWL 100
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OWL 100

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

Specifications:

Size60 x 48 x 19 mm (2.4 x 1.9 x 0.7 in)
Weight54 g / 1.9 oz (All models except OWL 100-Poly)
80 g / 2.8 oz (OWL 100-Poly water-resistant model)
Case MaterialNoryl® 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
Battery3.6 volt Lithium
Memory Size32 KB (32,767 readings)
Sampling MethodContinuous (First-in, First-out)*, Stop When Full (Fill-then-stop)
*Not available for sample rates faster than 8 seconds
Sampling RateUser selectable rates from 5 per second to once every 12 hours
Resolution8-bit (1 part in 256)
CommunicationOptical data transfer; data can be transmitted through glass or transparent medium up to 25 mm (1in)
Alarm TypeFlashes red LED once every 8 seconds
PC RequirementsWindows PC with a least 256MB RAM, 250MB of hard drive space and one free serial or USB port
Software RequirementsTrendReader® (compatible with Windows 7, Windows 8 & Windows 10)
Memory Size32 KB
Total Accuracy+/- 0.5°C @ 25°C (0.9°F @ 77°F)
(Can be increased by using narrow range feature)
Standard Resolution0.5°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

Data on OWL 100 (pdf, opens in a new tab)

OWL100 Single channel internal temperature logger: $425+GST  (03/19)

Also required: TR3-LIC102 TrendReader software with USB Light Wand cable, see below

OWL 200 Single-Channel External Temperature Data Logger


The OWL 200 data logger can record temperature or switch status in environments that typical data loggers cannot withstand. Since the OWL’s temperature sensor is external, the sensor can work in excessive heat while the logger remains in a cooler environment.
OWL 200
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OWL 200

The OWL 200 data logger can record temperature or switch status in environments that typical data loggers cannot withstand. Since the OWL’s temperature sensor is external, the sensor can work in excessive heat while the logger remains in a cooler environment. Because of its small size and being fully battery powered, the OWL can also fit into tight spaces.

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

Specifications:

Size60 x 48 x 19 mm (2.4 x 1.9 x 0.7 in)
Weight54 g / 1.9 oz 
Case MaterialNoryl® plastic
Operating Limits-40 to 70°C (-40 to 158°F) and 0 to 95% RH (non-condensing) 
Clock Accuracy+/- 2 seconds per day
Battery3.6 volt Lithium
Memory Size32 KB (32,767 readings)
Sampling MethodContinuous (First-in, First-out)*, Stop When Full (Fill-then-stop)
*Not available for sample rates faster than 8 seconds
Sampling RateUser selectable rates from 5 per second to once every 12 hours
Resolution8-bit (1 part in 256)
CommunicationOptical data transfer; data can be transmitted through glass or transparent medium up to 25 mm (1in)
Alarm TypeFlashes red LED once every 8 seconds
PC RequirementsWindows PC with a least 256MB RAM, 250MB of hard drive space and one free serial or USB port
Software RequirementsTrendReader® (compatible with Windows 7, Windows 8 & Windows 10t)
Memory Size32 KB
Logger Accuracy+/- 1% of range

Data on OWL 200 (pdf, Opens in a new tab)

OWL200 Single channel external temperature logger (probe not included, see below): $425+GST  (03/19)

Also required: TR3-LIC102 TrendReader Software with USB Light Wand cable, see below

ET Series Thermistor Probes with rounded tip (except -GP, -STP, -SMP), Teflon cable, all are waterproof:

ET-016/6M General Purpose Stainless Steel probe, 1 X 5mm probe. Range: -35° to 95°C Length: 6 meters. $122+GST
ET-016/SMP Special Surface Pipe Mount G.P. Stainless steel, 3mm x 10mm probe. Range: 20° to 40°C Length: 6.0 meters $155+GST
ET-016/STP Skin Surface Temperature Stainless steel probe, 3mm x 10mm probe. Range: -35° to 95°C, 10K @ 25 deg C, Length: 1.5 meters $135+GST
ET-004/6M Low Temp Stainless steel, 1 x 5mm probe. Range: -60° to 55°C Length: 6 metres. $122+GST
ET-016/6M General Purpose Stainless Steel probe, 1 X 5mm probe. Range: -35° to 95°C Length: 6 meters. $122+GST
ET-081/6M High Temp Thermistor Probe $122+GST
ET-086/6M Oven Temp Stainless steel probe, 1 X 5mm probe. Range: 70° to 255°C Length: 6 meters $122+GST

Software: TrendReader for Windows

TrendReader

TrendReader® 3 is a powerful, versatile and easy-to-use software application for all versions of windows, designed exclusively for ACR’s SmartReader Plus, SmartReader, IAQ, OWL, TRH, JR and Nautilus data loggers.

Powerful features and easy setup enables collected data to be thoroughly analyzed in seconds.

TrendReader Software details includes download trial (ACR site, opens in new tab)

Data Sheet on TrendReader 2 Rev 6, 7/11/2012 (pdf, opens in a new tab)

Data collected in ACR Data Loggers is downloaded using the USB port of a computer, with the bundled USB cable.

TrendReader Software features:

  • Simple logger setup window
  • Compound multiple graphs to a resultant graph
  • Export data to most spreadsheet formats
  • Interface with remote loggers via modem
  • Multi-graph display
  • Zoom
  • Scale units
  • Add comments
  • Data table view

Updates: TrendReader updates are available free of charge to existing users at the ACR website – downloads.

TR3-LIC102  TrendReader3 software package incl. LIC-102 USB Light Wand interface cable for OWL loggers: $295+GST

FAQ on OWL Loggers

What is the resolution of OWL loggers?

8 bit (1 part in 256) however, it can be optimized to the equivalent of 10 bit resolution.

How does an OWL logger connect to the computer?

It uses either the LIC-101 serial or LIC-102 USB interface cable (Light Wand) for connection to the computer.

Does the interface cable (Light Wand) come with the OWL?

No, it comes with the software. That is, when you order the software you will receive the interface cable (Light Wand) as well. However, you can also order it separately, if you would like an extra cable.

How does the Light Wand work?

It uses optical communication. You place the Light Wand in front of the optical eye of the logger and the communication starts automatically.

Does the OWL support remote communication?

No. You cannot download data from an OWL logger using modem or telephone lines.

Is the OWL-100 water-resistant?

Yes, the OWL –100 Polyurethane model is water-resistant. It has an IP67 rating (Part number: 01-0050 OWL-100-Poly). Note that the other OWL-100 logger has a plastic case (Part number: 01-0250 OWL-100-Plastic) and is not water-resistant.

What are the fastest and slowest sample rates for OWL loggers?

The fastest sample rate is one sample every 0.2 seconds and the slowest sample rate is one sample every 12 hours.

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