Owl 400 – DC Voltage

SKU: 01-0253
Model: OWL-400

Single channel, 8 bit, 32 KB data logger (One 0-38.4V DC channel).

Product Features

The OWL 400 data logger is a rugged and versatile data logger that records DC voltage with ease and convenience. This logger is ideal for monitoring (through commercially available transducers) a wide variety of measurement parameters. All voltage signals can be converted into custom engineering units using the simple equation editor in ACR’s TrendReader software.

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-years warranty


Software Requirements




60 x 48 x 19 mm (2.4 x 1.9 x 0.7 in)


54 g / 1.9 oz (All models)

Case Material

Noryl® plastic (All models)

Operating Limits

-40 to 70°C (-40 to 158°F) and 0 to 95% RH (non-condensing)

Clock Accuracy

+/- 2 seconds per day


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


8-bit (1 part in 256)


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

Memory Size

32 KB

Input Range

0 to 38.4 Volts DC (32 software selectable ranges available)


+/- 1% of full scale

Input Impedance

Greater than 100 K ohms