What Rees Scientific does

Rees Scientific Corporation, founded in 1982 and headquartered in Trenton, New Jersey, is a private US provider of continuous automated environmental monitoring systems (EMS) for regulated industries. Its hardware portfolio centers on the Centron Presidio all-in-one monitoring device and a family of compliant sensors (temperature, humidity, differential pressure, CO2, oxygen, light, air changes per hour), deployed in wired, wireless (ZigBee), WiFi, and hybrid configurations spanning +1300°C to -196°C. The software layer is anchored by the Rees Helix Platform and Centron Presidio Software, both validated for FDA 21 CFR Part 11 and offered on-premises or as SaaS, with local data buffering at the wireless-module level for continuity during outages.

The company's business model combines hardware sales, professional services, and recurring service contracts. Professional services span CQV (Commissioning, Qualification, Validation) — including IQ/OQ/PQ, NIST-traceable calibration, temperature/humidity mapping, and preventative maintenance — with over 4.2 million calibrations completed to date. Recurring revenue is generated through the tiered Shield Essential, Shield Watch, and C.O.R.E Shield service brands, the latter providing dedicated on-site system administration. Go-to-market is direct enterprise field sales through regionalized sales and service engineers, initiated by a 'Request an Assessment' consultative process, with over 100 factory-trained field technicians deployed regionally across the US and a native European team supporting international customers.

Rees serves a broad set of regulated verticals, with primary exposure to pharmaceutical and biotechnology, hospitals, pharmacies, blood and tissue banking, cell and gene therapy, cleanrooms, biomedical research, biological repositories, forensic labs, IVF clinics, and US Department of Defense / Defense Health Agency facilities (the latter accessed via ECAT contracts). Named customers include Merck, Roche, Charles River, Eurofins, Covance by Labcorp, Icon PRA, Beth Israel Medical Center, City of Hope, and Prisma Health. The company holds ISO 9001:2015 certification and ISO/IEC 17025:2017 accreditation for calibration services, and is led by CEO Sandip Mukerjee, CFO Shimpy Sanan, CCO Phil Alfieri, VP Sales Christopher Kanaby, and VP Quality & Validation Tommy O'Donnell.

Name

Rees Scientific

Legal name

Rees Scientific Corporation

Website

https://reesscientific.com

Company type

Private

Founded year

1982

Operating status

Operating

Headcount range

101–250 employees

Short description

Rees Scientific is a US provider of continuous automated environmental monitoring systems (hardware, software, and CQV services) for regulated industries including pharma, biotech, hospitals, cell and gene therapy, and US Department of Defense facilities. Founded 1982 and headquartered in Trenton, NJ, it serves Fortune 500 customers across 12+ verticals with ISO 17025-accredited calibration and the largest regional field-service team in the sector.

Ownership category

akta.pro rank

Product category

Environmental Monitoring Systems

NAICS

Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512), Navigational, Measuring, Electromedical, and Control Instruments Manufacturing (3345), Other Measuring and Controlling Device Manufacturing (334519)

SIC

Industrial Instruments For Measurement, Display, And Control (3823), Auto Controls For Regulating Residential & Comml Environments (3822), Instruments For Meas & Testing Of Electricity & Elec Signals (3825)

akta.pro primary industry

Smart Air Quality Sensors, Purifiers & Humidifier/Dehumidifier Integration (HSAOANAH)

akta.pro secondary industry

Refrigeration Systems Maintenance (Commercial/Industrial) (BPABACAI)

Keywords

• Environmental monitoring systems
• Temperature monitoring solutions
• Compliance calibration services
• Validation qualification services
• Cleanroom monitoring systems

Headquarters

HQ city

Trenton

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Environmental Monitoring Systems (Hardware & Software): Sale and installation of environmental monitoring hardware (sensors, wireless modules, data loggers) combined with proprietary software platforms. Systems available as on-premises installations or SaaS delivery. Includes Rees Helix Platform and Centron Presidio solutions.
2. Professional Services (Calibration, Validation, Mapping): Comprehensive CQV (Commissioning, Qualification, Validation) services including Installation Qualification (IQ), Operational Qualification (OQ), Performance Qualification (PQ), calibration, temperature mapping, and preventative maintenance. Rees has completed over 4.2 million calibrations. Services support GxP compliance requirements.
3. Ongoing Support & Maintenance Contracts: Continuous support services including Shield Essential (Tier 1 call center for nights/weekends), Shield Watch (24/7/365 Tier 2 support), and C.O.R.E Shield Service (dedicated on-site service support with system administration, service calls, installations, training, and preventative maintenance coordination).

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

Rees Scientific designs, manufactures, sells, and services continuous automated environmental monitoring systems for regulated industries. Its offering combines proprietary hardware (Centron Presidio device and a sensor portfolio), proprietary software platforms (Rees Helix and Centron Presidio Software), and lifecycle services including facility design, installation, calibration, validation, mapping, preventative maintenance, and 24/7/365 technical support. Systems can be delivered as wired, wireless (ZigBee), WiFi, or hybrid configurations and deployed on-premises or as SaaS, covering temperatures from +1300°C to -196°C and parameters including humidity, differential pressure, CO2, oxygen, light, and air changes per hour.

Product overview

Rees Scientific offers an integrated environmental monitoring platform combining hardware, software, and services. The core hardware portfolio includes the Centron Presidio (an all-in-one monitoring device) and specialized Environmental Monitoring Sensors (temperature, humidity, differential pressure, CO2, oxygen, light, airflow). These hardware products are available in Wireless & WiFi (ZigBee-based with local buffering) and Wired configurations. The software layer centers on the Rees Helix Platform (the unified monitoring experience) and the Centron Presidio Software (sophisticated, compliant software with audit trails and FDA 21 CFR Part 11 support). Delivery options span on-premises or SaaS deployment. Rees complements its products with a full lifecycle service suite covering EMS Design Process, Installation (with IQ/OQ/PQ), EMS Calibration (NIST-traceable, onsite), EMS Validation (software and system validation), EMS Preventative Maintenance, and Training and Support (including Shield Essential, Shield Watch, and C.O.R.E Shield tiers). A dedicated CQV service line provides Calibration, Validation, Temperature & Humidity Mapping, and CTU Preventative Maintenance for regulated environments.

Differentiator

Problem solved

Functional benefit

Brands

• Centron Presidio: Hardware platform for environmental monitoring with all critical functions performed in one component.
• Rees Helix Platform
• Shield Essential
• Shield Watch
• C.O.R.E Shield Service

Products and services

• Centron Presidio An all-in-one environmental monitoring hardware device that performs all critical monitoring functions (temperature, humidity, pressure, CO2, and more) in a single component, designed for regulated environments requiring compliance-grade measurement.
• Environmental Monitoring Sensors A portfolio of compliant, reliable sensors and probes tailored for regulated environments, covering temperature, humidity, differential pressure, CO2, oxygen, light, and air changes per hour across equipment such as refrigerators, freezers, incubators, and cleanrooms.
• Centron Presidio Software Sophisticated, secure, and compliant software platform paired with the Centron Presidio hardware, providing audit trails, alarm management, data integrity controls, and FDA 21 CFR Part 11 compliance for electronic records and signatures.
• Rees Helix Platform A unified, secure, and modern environmental monitoring platform that serves as the core software layer across Rees's hardware portfolio, providing real-time visibility, automated reporting, alarm escalation, audit trails, and data encryption for regulated environments.
• Wireless & WiFi Systems Wireless and WiFi-based environmental monitoring system configurations using ZigBee wireless modules that support local data buffering at the field-device level, enabling resilient monitoring even during network outages, with automatic data sync upon connectivity restoration.
• Wired Systems Hardwired environmental monitoring system configurations offering reliable, deterministic connectivity for facilities requiring wired infrastructure, supporting the same sensor portfolio and Rees Helix Platform integration as wireless variants.
• EMS Design Process A tailored facility assessment and system design service that produces a comprehensive Vendor Turnover Package including drawings, specifications, and catalog cutsheets, with seamless project schedule integration and collaboration with architects, engineers, and construction teams for new builds and renovations.
• EMS Installation Installation services for Rees environmental monitoring systems including Installation Qualification (IQ), Operational Qualification (OQ), and Performance Qualification (PQ), with expert guidance on compliance and validation, customized to facility operational flow, integration needs, and scalability.
• EMS Calibration Onsite calibration services for EMS sensors including temperature (standard, ultra-low, and cryogenic/LN2 at -196°C), relative humidity, CO2, differential pressure, light (lux), and airflow, using NIST-traceable standards with calibration certificates and as-found/as-left data documentation.
• EMS Validation Comprehensive validation services including software validation for FDA CFR Part 11 compliance, Installation Qualification (IQ), Operational Qualification (OQ), and support for Performance Qualification (PQ), with full documentation for SaaS, server-node, and physical sensor environments.
• EMS Preventative Maintenance Nationwide preventative maintenance services including onsite inspection, sensor calibration verification, software and firmware updates with quality approval, onsite training, and 24/7/365 product support, with customized maintenance plans tailored to facility needs.
• Training and Support

Quantifiable outcome

• Over 4.2 million calibrations completed
• +3 more outcomes

Named customers9 records

Segments13 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators6 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Vaisala: Finnish global leader in industrial and environmental measurement. Directly competes in continuous monitoring of temperature, humidity, CO2, and differential pressure for life sciences and cleanrooms with the viewLinc and Continuous Monitoring System platforms.
• Mesa Laboratories: Specializes in continuous monitoring solutions (DataTrace, AmegaView) for pharmaceutical, medical device, and food safety customers. Closest pure-play peer in regulated temperature and environmental monitoring; now part of Roper Technologies.
• Rotronic (Process Sensing Technologies): Manufactures humidity, temperature, CO2, and differential pressure measurement instruments and monitoring systems under the Rotronic and PST portfolio. The CCO of Rees (Phil Alfieri) previously ran this business at PST, underscoring direct competitive overlap.
• SensoScientific: Wireless environmental monitoring specialist serving pharma, biotech, healthcare, and food with Wi-Fi/cloud-based sensors. Competes head-to-head with Rees in regulated wireless monitoring deployments.
• Isensix: Wireless temperature, humidity, and pressure monitoring for regulated life sciences facilities. Direct overlap in product offering, customer base, and wireless architecture.
• ELPRO-Buchs: Swiss-headquartered specialist in temperature monitoring and LIBERO cold chain data loggers for pharmaceutical, clinical, and biobank applications. Comparable in regulated pharma/biotech monitoring with strong European presence.
• Sensitech (Carrier): Cold-chain visibility and temperature monitoring provider for pharma and life sciences, now within Carrier Global. Competes in temperature monitoring and traceability for biologics, vaccines, and clinical supply chains.
• Zebra Technologies (Temptime): Through the Temptime acquisition, Zebra offers temperature indicators and monitoring for healthcare. Overlaps in healthcare cold-chain temperature monitoring, though more focused on labels/indicators than full EMS systems.

Broad incumbents

• Thermo Fisher Scientific: Global scientific instrumentation giant whose laboratory equipment, sample storage, and connected solutions overlap with Rees's regulated-customer use cases. Much broader portfolio; not a focused environmental monitoring specialist but a formidable scaled competitor.
• STERIS: Global provider of sterilization, cleaning, and infection-prevention products and services, including cleanroom environmental services. Broad incumbent with adjacent (but not directly competing) environmental services for pharma/biotech manufacturing.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/reesscientific
• YouTubeyoutube.com/channel/UCaRFmzh25aEkweGvvyc4Upw
• Facebookfacebook.com/ReesScientific
• LinkedInlinkedin.com/company/rees-scientific
• Instagraminstagram.com/rees_scientific

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 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 Rees Scientific