Actiwatch plus

Actiwatch Spectrum Plus

Get the Actiwatch advantage

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.

Request more information

Actiwatch Spectrum Plus


Size: 48mm x 37mm x 14mm
Weight: 30 grams (with band)
Case Material: ABS Blend (Biocompatible)
Standard Wrist Band: BASF Elastollan 1175A10W (TPU) with titanium buckle
Battery Type: CR 2032 Rechargeable Lithium Coin Cell (Factory Replaced)
Logger Battery Life: 50 days
Memory: Non-volatile 1 MBits

Logging interval

Epoch Length Epochs per day Logging time (activity only) Logging time (activity and RGB light)
15 seconds 5760 45.5 days 9 days
30 seconds 2880 91 days 18 days
1 minute 1440 182 days 36 days
Note: Device also records in 2-minute and 5-minute epoch lengths, in photopic light-only mode, and in an RGB 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: Color sensitive photodiodes
Wavelength Range: 400 - 700 nanometers
Measurement Units: Irradiance (microwatts/cm²
Photon flux (photons/cm²/sec
Photopic illuminance (Lux)
Illuminance Range: 0.1 - 5500 microwatts/cm²
Accuracy: 10% at 1500 Lux (typical)

Off wrist detector

Sensor: Capacitive
On-Wrist Activation Range: < 2mm

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
Communications Interface: USB to Infrared connection
USB Compatibility: Version 1.1 or 2.0 full speed
Data Communication Rates: 57.6 kbps