ScratchSense

Advanced Tracking of Scratching Behavior and Sleep Patterns

In pruritus trials, subjective itch scores are notoriously noisy. Patients forget, underestimate, or scratch unconsciously during sleep, creating blind spots that inflate variance and weaken statistical power. ScratchSense closes that gap with objective, continuous data on scratching behaviour and sleep quality.

Scratch and sleep tracking for pruritus trials

ScratchSense is a clinical-grade ring sensor that captures scratching behaviour and sleep quality continuously, 24 hours a day. Weighing approximately 11g and available in 16 sizes, it is designed for weeks of wear without participant burden. Data is processed through Stingray Observatory, Replior’s sensor backend, which logs every step from device to database for a complete, audit-ready record.

What patient diaries cannot tell you

Nocturnal scratching is a defining feature of pruritic conditions including Atopic Dermatitis, Chronic Prurigo, and Chronic Spontaneous Urticaria. Yet it remains one of the hardest behaviours to capture. Patients scratch during sleep without awareness. When they do recall, they underestimate frequency and severity. The result is high intrapatient variability that inflates sample size requirements and weakens the statistical power of efficacy endpoints.

ScratchSense captures what patient diaries cannot: continuous, objective data on scratching behaviour and sleep quality across every night of a study.

Defined clinical measurements

Biomechanical precision:

Scratching is more complex than a binary yes/no. ScratchSense captures seven dimensions of each scratch event, including intensity (Hz), force (N), amplitude (cm), duration, and whether nails were used, giving you endpoints that reflect the full clinical picture.

No blind spots:

ScratchSense captures data continuously, 24 hours a day, including throughout the night when scratching most often occurs. With 5 to 12 days of battery life and on-device storage of 2 to 4 weeks, no nocturnal data is missed.

Passive participant burden:

Once worn, ScratchSense captures and logs data automatically. Participants do not need to press buttons, complete diaries, or recall behaviour. The sensor does the work.

Regulatory-approved hardware:

ScratchSense holds radio approvals for FCC (USA), ISED (Canada), ACMA (Australia), and RSM (New Zealand). CE Declaration of Conformity was issued in May 2026. Analytical validation against infrared video (scratch) and PSG (sleep) is ongoing, targeting sensitivity and specificity greater than 95%.

Designed for Everyday Use

ScratchSense combines clinical-grade durability with everyday wearability. Weighing approximately 11g (0.38 oz), it is built for continuous wear across studies lasting weeks to months.

Sleek and Durable Design

Constructed with a silver housing and polycarbonate bezel, it is lightweight (IP67 waterproof) and built for long-term wear.

Custom Fit Options

Available in 16 interchangeable sizes (US 5 to US 15) with configurable designs to suit all participants.

Convenient Data Management

Data syncs automatically to a smartphone app via Bluetooth and is processed through Stingray Observatory for secure, audit-ready access.

Extended Storage and Battery Life

Holds up to 2 to 4 weeks of data on-device and offers 5 to 12 days of battery life, depending on configuration.

Flexible Setup

Supports one or two sensors per hand for bilateral configuration, and includes a charging cradle for up to four devices.

Advanced Connectivity

A Complete Family of Sensors

ScratchSense is part of Replior’s clinical sensor platform. While RaySense measures continuous UV, visible and infrared light exposure for dermatology and photosensitivity studies, ScratchSense captures scratching behaviour and sleep quality in pruritus trials. Together they give clinical teams objective, device-reported data to complement patient-reported outcomes.