Ambulatory Monitoring

What Ambulatory Monitoring does

Ambulatory Monitoring, Inc. (AMI) is a privately held, FDA-registered medical device manufacturer founded in 1988 in Ardsley, New York, that specializes in actigraphy and physiological monitoring equipment for ambulatory subjects. The company builds wrist-worn and torso-worn hardware that uses accelerometry and proprietary signal-processing modes (Zero Crossing, Proportional Integrating Measure, Time-Above-Threshold) together with published sleep-estimation algorithms (Cole-Kripke, Sadeh, UCSD) to objectively document sleep/wake patterns, circadian rhythms, hyperactivity, fatigue, vigilance, and respiration. AMI coined the term "Actigraph" during early work with the US Army and remains anchored on its flagship Motionlogger Actigraph line, which holds FDA 510(k) clearance K854030 and FDA registration 2430863. The product portfolio spans the Motionlogger family (including BLE and Sleep Watch 2.0 variants), the Zzz-Logger wrist watch, the PVT-192 psychomotor vigilance monitor, the Inductotrace inductive plethysmograph for respiration, and the Buzz Bee operant-conditioning device for ADHD, supported by Watchware, ActionW, and Action4 software.

AMI operates as a B2B enterprise medical device company selling directly to institutional customers — primarily academic medical centers and sleep clinics, pharmaceutical sponsors running clinical trials, and government agencies including NASA and the US Department of Defense. Revenue is generated through one-time hardware sales of FDA-cleared devices, one-time software licenses for ActionW, Action4, and Watchware, and ancillary expert analysis services. The firm markets principally through its scientific credibility (a curated bibliography of 200+ peer-reviewed publications) and direct inquiry-based sales rather than traditional advertising, with a 2023 product refresh emphasizing Bluetooth Low Energy, BYOD support for pharma trials, and smartphone/tablet-compatible PVT testing. AMI has reported 1–10 employees, no external funding, no parent company, and continuous operation since 1989 under long-tenured leadership following the death of founder William Gruen.

Name

Ambulatory Monitoring

Legal name

Ambulatory Monitoring, Inc.

Website

https://ambulatory-monitoring.com

Company type

Private

Founded year

1988

Operating status

Operating

Headcount range

1–10 employees

Short description

Ambulatory Monitoring, Inc. is an FDA-registered medical device manufacturer that builds actigraphy and physiological monitoring hardware and software — including the Motionlogger, Zzz-Logger, PVT-192, Inductotrace, and Buzz Bee — used by medical centers, pharmaceutical companies, NASA, and the US Department of Defense for sleep, circadian, vigilance, and respiratory research.

Ownership category

akta.pro rank

Product category

Ambululatory Physiological Monitoring Devices

NAICS

Electromedical and Electrotherapeutic Apparatus Manufacturing (334510), Navigational, Measuring, Electromedical, and Control Instruments Manufacturing (3345)

SIC

Surgical & Medical Instruments & Apparatus (3841), Electromedical & Electrotherapeutic Apparatus (3845)

akta.pro primary industry

Respiratory & Sleep RPM (COPD, asthma, sleep apnea) (HLALAFAB)

akta.pro secondary industries

Blood Oxygen & Respiratory Monitoring (Pulse Oximetry, Capnography, Spirometry) (HLAHACAD), Geriatric, Frailty & Fall-Prevention Remote Monitoring (HLALAFAI)

Keywords

• Actigraphy medical devices
• Ambulatory physiological monitoring
• Sleep and circadian monitoring
• Psychomotor vigilance testing
• Wearable actigraphy devices

Headquarters

HQ city

Ardsley

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Operations, Supply Chain, Technology or R&D, Personnel, Marketing or Sales, Infrastructure

Revenue model

1. Medical Device Hardware Sales: AMI generates revenue primarily through the sale of medical monitoring devices including Motionlogger Actigraphs, Zzz-Logger, PVT-192, Inductotrace, and Buzz Bee. These are FDA-registered medical devices sold to healthcare and research institutions.
2. Analysis Software: AMI provides proprietary software including ActionW for clinical sleep scoring and Action4 for circadian research. Software enables users to set up actigraphs, download data, perform sleep scoring, and conduct circadian rhythm analyses.
3. Expert Analysis Services: AMI offers expert analysis services by seasoned experts for study records, providing specialized data analysis for customers who prefer outsourced processing.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Ambulatory Monitoring, Inc. (AMI) is an FDA-registered medical device manufacturer that designs, produces, and sells actigraphy-based wearable monitoring systems — led by the FDA-cleared Motionlogger® Actigraph line — along with the Zzz-Logger® sleep tracker, PVT-192 reaction-time device, Inductotrace® respiratory plethysmograph, and Buzz Bee® hyperactivity device, plus Watchware, ActionW, and Action4 software. The products objectively document long-term sleep, daytime activity, circadian rhythm, vigilance, hyperactivity, respiration, and environmental light/temperature in ambulatory subjects for clinical research and government customers.

Product overview

Ambulatory Monitoring Inc. (AMI) is an FDA-registered medical device manufacturer offering a portfolio of actigraphy-based physiological monitoring products. The core product line centers on the Motionlogger Actigraphs family for long-term monitoring of sleep, activity, hyperactivity, fatigue, circadian rhythm, vigilance, and respiration. The Motionlogger Actigraphs (including Micro Motionlogger Watch and Sleep Watch 2.0 variants) serve as the primary hardware platform, while supporting products include the Zzz-Logger wrist-worn sleep tracker, PVT-192 for psychomotor vigilance testing, Inductotrace for respiratory monitoring, and Buzz Bee for hyperactivity management. Complementary software includes Watchware for device initialization and data download, ActionW for clinical sleep scoring, and Action4 for circadian research analysis. The products utilize validated algorithms (Cole-Kripke, Sadeh, UCSD) for sleep estimation and are used by medical centers, pharmaceutical companies, NASA, and the US Department of Defense.

Differentiator

Problem solved

Functional benefit

Brands

• Motionlogger®: Actigraph product line for monitoring sleep, activity, circadian rhythm, and daytime sleepiness - includes Micro Motionlogger Watch, Motionlogger Micro BLE, and Sleep Watch 2.0
• Zzz-Logger®
• Inductotrace®
• Buzz Bee®
• PVT-192 Psychomotor Vigilance Task Monitor
• ActionW
• Action4
• Watchware

Products and services

• Motionlogger Actigraphs FDA-cleared (K854030) actigraphy devices for 24-hour monitoring of activity and sleep patterns in ambulatory subjects. The Micro Motionlogger Watch includes 2 Mb non-volatile memory, multiple modes of operation (Zero Crossing, Time-Above-Threshold, Proportional Integrating Measure), temperature and ambient light channels, off-wrist detection, event marking with visual feedback, 30-day battery runtime, IrDA wireless interface, and 100M water resistance. Designed for clinical research, pharmaceutical trials, sleep medicine, and government research customers.
• Motionlogger Micro BLE BLE-enabled Motionlogger variant that wirelessly connects to any smartphone, enabling remote data collection and the BYOD concept in pharmaceutical clinical trials. Subjects can replace the device battery and continue recording indefinitely, and the companion smartphone app can be combined with questionnaires, rating scales, and PVT reaction-time measurement.
• Sleep Watch 2.0 Updated Motionlogger Watch variant featuring a rechargeable battery, BLE wireless connectivity, the highest documented PSG agreement, 2 Mb non-volatile memory, multiple modes of operation, off-wrist detection, temperature and ambient light channels, event marking with visual/audible feedback, status/battery indicators, 30-day runtime, optional user rating scale, and on-board PVT reaction-time test, in a sports-watch-style 50M water-resistant case.
• Zzz-Logger with Sleep Tank Wrist-worn sleep and step-counter that objectively measures sleep/wake behavior from body movement, with SleepTank functionality for displaying sleep statistics, automatic bedtime estimation, nap capture for sessions of 20 minutes or longer, 100M water resistance, and wireless smartphone sync. Used in sleep clinics and by individual researchers worldwide.
• PVT-192 Psychomotor Vigilance Monitor Gold-standard reaction-time testing device for long-term, large-scale testing of vigilance, effects of sleep deprivation, and drug effects. Provides high-resolution, accurate timing with calibrated buttons and visual/auditory stimulus, supports multiple stored tests across a wide range of test lengths, and is used in transportation, pharmaceutical, and defense research.
• Inductotrace Inductive plethysmograph (formerly Respitrace) consisting of two elastic bands with insulated wires (Inductobands) wrapped around the rib cage and abdomen to measure compartmental volume excursions via changes in self-inductance, calibrated to known volume with a spirobag or spirometer. Available in sizes from premature newborn to super obese subjects, plus animal-study sizes, for sleep and respiratory monitoring in clinical research.
• Buzz Bee Pager-form-factor, pharmaceutical-free hyperactivity-management device for children that uses actigraphy with vibratory and auditory feedback based on operant conditioning. Weighs 2.5 ounces, has 2 Mb RAM for 30-day data storage, samples a filtered acceleration signal at 10 Hz with 0.02 g sensitivity, and displays immediate session results via three LEDs (red, amber, green). Documented to produce 20%+ activity-level reductions vs. baseline in ADHD subjects.
• PVT for Smartphone/Tablet Smartphone/tablet-based PVT implementation with functionality comparable to the PVT-192 but lower resolution and some platform-to-platform variability, suitable for study protocols where sizeable reaction-time change is expected.
• Watchware Operational Software Software for initializing AMI actigraphs (Motionlogger and Sleep Watch devices) and downloading recorded data via IrDA (infrared) or BLE (Bluetooth Low Energy) interfaces. Users can save data for later analysis or export to files for use with ActionW and Action4.
• ActionW Clinical Sleep Scoring Software Easy-to-use clinical sleep scoring program that lets users quickly mark sleep periods for analysis using graphical drag-and-drop boundary tools, generates customizable sleep-variable reports and graphics, and exports data for downstream use.
• Action4 Circadian Research Software Advanced circadian rhythm analysis software featuring Autocorrelation, Dichotomy Index, FACE (Frequency Analysis of Consecutive Epochs), and Non-Parametric Circadian Analysis variables including Interdaily Stability, Intradaily Variability, and Relative Amplitude, used with Motionlogger data for circadian research.
• Expert Analysis Services Outsourced expert analysis of AMI study records performed by seasoned specialists, providing specialized physiological data analysis for customers who prefer not to process actigraphy or PVT data in-house.

Quantifiable outcome

• Highest agreement with polysomnography (PSG) in multiple populations compared to other actigraphs
• +1 more outcomes

Named customers4 records

Segments8 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature11 records

Partnerships

Five partnerships are on record, tiered core and minor.

• Medical CenterscoreOthersAMI devices are used by thousands of medical centers worldwide for clinical and research applications in sleep medicine, cardiology, and general physiological monitoring.
• Pharmaceutical CompaniescoreStrategic or Co-development PartnerAMI serves pharmaceutical companies for drug efficacy studies and clinical trials, with Motionlogger Micro BLE supporting BYOD (Bring Your Own Device) approaches in pharmaceutical studies. The devices are used to objectively measure patient outcomes in clinical research.
• NASAcoreStrategic or Co-development PartnerAMI equipment has been used in orbit around the earth for astronaut sleep and circadian rhythm monitoring in space missions. The company has conducted chronobiological measurements in astronauts.
• US Department of DefensecoreStrategic or Co-development PartnerAMI devices are used by the US Department of Defense for fatigue monitoring, vigilance testing, and physiological assessment of military personnel. The term 'Actigraph' was originally coined during early work with the US Army.
• UCSD (University of California San Diego)minorStrategic or Co-development PartnerUCSD researchers including Sonia Ancoli-Israel have conducted extensive validation studies comparing AMI actigraphy to polysomnography. The UCSD set of sleep estimation algorithms works with AMI's PIM mode data.

Scale indicators8 records

Recent moves6 records

Expansion highlights5 records

Market position

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/ambulatory-monitoring-inc

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Ambulatory Monitoring