Actiwatch 2

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The Actiwatch family of devices is designed to help you better understand a subject’s daily activity and sleep/wake patterns in response to drug or behavioral therapies. Cost-effective, and objective, each device is built to be rugged, comfortable, and waterproof. Find the device that best meets your needs.

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Actiwatch 2


Size: 43mm x 23mm x 10mm
Weight: 16 grams (with band)
Case Material: ABS Blend (Biocompatible)
Standard Wrist Band: BASF Elastollan 1175A10W (TPU) with titanium buckle - accommodates 7mm hospital type band
Battery Type: Lithium cell (rechargeable at dock)
Logger Battery Life: 30 days at 1-minute epoch lengths
Memory: Non-volatile 1 MBits

Logging interval

Epoch Length Epochs per day Logging time (activity only) Logging time (activity and light)
15 seconds 5760 22.7 days 7.5 days
30 seconds 2880 45.5 days† 15.1 days
1 minute 1440 91 days† 30.3 days
† Actual recording time limited by battery life of 30 days typical before recharging is required.
Note: Device also records in 2-minute and 5-minute epoch lengths and in a light only mode.

Accelerometer details

Type: Solid-state "Piezo-electric" accelerometer
Range: 0.5 - 2 G peak value
Bandwidth: 0.35 - 7.5 Hz typical
Sensitivity: 0.025 G (a 2 count level)
Sampling Rate: 32 Hz

Light sensor details

Type: Silicon photodiode
Wavelength Range: 400 - 900 nanometers
Wavelength Peak Sensitivity: 570 nanometers
Measurement Units: Photopic illuminance in Lumens/m² (Lux)
Illuminance Range: 5 - 100,000 Lux
Accuracy: 10% at 3000 Lux (typical)

Environmental attributes

Moisture Protection: Waterproof 1m for 30 min per IPX7 IEC 60529
Operating Temperature Range: 5°C to 40 °C
Resistance: Resists dust, water, heat, perspiration and cold

Computer & communications doc attributes

Hardware Platform Personal Computer: Pentium II or later
Operating System Compatibility Actiware: Windows 2000,
Windows XP or Windows Vista;
Actiware CT: Windows 2000,
Windows XP Pro, Windows Vista
Business or Vista Ultimate
USB Compatibility: Version 1.1 or 2.0 full speed
Data Communication Rates: 57.6 kbps
Dock Functions: Battery charge, device configuration and data retrieval
Charge Mode: USB connection or wall current