Nielsen-Kellerman

What Nielsen-Kellerman does

Nielsen-Kellerman Co. is a US-based, privately held manufacturer founded in 1978 and headquartered at 21 Creek Circle, Boothwyn, Pennsylvania, with over 150 employees and ten discrete consumer brands. The company designs and builds portable electronic measurement instruments — anchored by the Kestrel line of handheld weather and environmental meters (wind, temperature, humidity, pressure, altitude, WBGT heat stress), Kestrel Ballistics devices integrated with the Applied Ballistics library, NK Sports rowing performance technology (SpeedCoach GPS, StrokeCoach, CoxBox, Empower Oarlock), Blue Ocean megaphones, MagnetoSpeed chronographs, and RainWise, Ambient Weather, KestrelMet, and PVMet weather monitoring systems. Products connect via the proprietary Kestrel LiNK Bluetooth ecosystem to iOS, Android, Windows, and OSX applications and feed third-party software integrations and the Ambient Weather Network through a published Communications Protocol.

The business model is primarily hardware sales through a multi-brand direct-to-consumer e-commerce footprint (nkhome.com and brand-specific storefronts), a global authorized dealer network, and dedicated government/tax-exempt procurement enabled by ID.me verification. Recurring revenue is layered through a $75 factory tune-up and NIST-calibration service, replacement parts and accessories, and the AWN+ subscription for premium Ambient Weather Network features. Customer segments span athletes, competitive shooters, long-range hunters, firefighters, military and first responders, agricultural operators, meteorologists, and industrial safety managers.

Strategically, the company has compounded its original rowing franchise into a multi-vertical specialty instrument platform through organic brand launches and the January 2020 acquisition of Ambient Weather. Core competitive anchors include NIST-traceable calibration standards, US-based manufacturing, deep domain specialization in WBGT and ballistics, and a LiNK-driven integration ecosystem. Governance remains founder-controlled (Paul Nielsen and Richard Kellerman as co-founders), with no disclosed institutional investors, funding rounds, or parent entity.

Name

Nielsen-Kellerman

Legal name

Nielsen-Kellerman Co.

Website

http://www.nkhome.com/

Company type

Private

Founded year

1978

Operating status

Operating

Headcount range

51–100 employees

Short description

Nielsen-Kellerman is a US-based, founder-owned manufacturer of portable electronic measurement instruments across ten brands, including Kestrel weather and heat-stress meters, Kestrel Ballistics, NK Sports rowing performance systems, and the Ambient Weather network, serving athletes, shooters, military, fire, agriculture, and meteorology customers via D2C, dealers, and government channels.

Ownership category

akta.pro rank

Product category

Electronic Measurement Instruments

NAICS

Navigational, Measuring, Electromedical, and Control Instruments Manufacturing (33451), Other Measuring and Controlling Device Manufacturing (334519)

SIC

Industrial Instruments For Measurement, Display, And Control (3823)

akta.pro primary industry

Navigation, Lighting & Outdoor Electronics Retail (CRAMAMAF)

akta.pro secondary industry

Outdoor Navigation, Safety & Survival Gear Retail (CRAMAAAE)

Keywords

• Weather monitoring instruments
• Environmental data loggers
• Ballistics measurement devices
• Rowing performance electronics
• Heat stress monitors

Headquarters

HQ city

Boothby Pagnell

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Hardware Product Sales: Sale of weather meters, ballistics devices, sports performance equipment, and environmental monitoring instruments through e-commerce and dealer channels. Products include Kestrel series meters, DROP dataloggers, NK Sports products, and accessory items.
2. Calibration and Service: Factory calibration, NIST calibration, and tune-up services for Kestrel instruments. Tune-ups include replacement impeller, battery, functional checks, and cleaning at $75 flat rate.
3. Software Subscriptions: AWN+ subscription for Ambient Weather Network premium features.
4. Replacement Parts and Accessories: Sale of replacement batteries, battery doors, impellers, carrying cases, mounts, and other accessories for Kestrel products.

Pricing tiers

Go-to-market motion3 records

Distribution channels5 records

Marketing channels7 records

Core offering

Nielsen-Kellerman designs, manufactures, and sells portable electronic measurement instruments under ten brands, including handheld Kestrel weather meters, Kestrel DROP environmental data loggers, KestrelMet weather stations, Kestrel Ballistics calculators, NK Sports rowing performance monitors, MagnetoSpeed chronographs, RainWise and Ambient Weather stations, Blue Ocean megaphones, and PVMet solar weather instruments. The company sells its own US-made products direct through brand-specific e-commerce storefronts and through an authorized dealer network, complemented by factory calibration services and the AWN+ subscription platform.

Product overview

Nielsen-Kellerman is a US-based manufacturer with ten discrete brands spanning weather monitoring, sports performance, and ballistics. The core product lines include Kestrel Instruments (handheld weather meters and data loggers across Basic 1000-3550 and Advanced 5000-7000 series), Kestrel Ballistics (ballistics calculators and rangefinders for shooting), and NK Sports (rowing performance technology including SpeedCoach GPS and StrokeCoach). Additional brands include Blue Ocean Megaphone (public address systems), RainWise and Ambient Weather (weather stations), MagnetoSpeed (muzzle velocity measurement), AWN (weather observation network), KestrelMet (weather station systems), PVMet (solar monitoring), and HeatStress.com (occupational safety). Products connect via Kestrel LiNK software for wireless data management. The portfolio serves athletes, firefighters, military, scientists, meteorologists, hunters, and industrial workers.

Differentiator

Problem solved

Functional benefit

Brands

• NK Sports: Performance monitoring solutions for rowing and sports
• Kestrel Instruments
• Kestrel Ballistics
• Blue Ocean
• RainWise
• Ambient Weather
• MagnetoSpeed
• AWN
• KestrelMet
• PVMet
• HeatStress.com

Products and services

• Kestrel Basic Weather Meters (1000-3550 series) Entry-level handheld Kestrel weather meters measuring wind speed, temperature, humidity, barometric pressure, and other environmental conditions for outdoor recreation, sports, and general environmental awareness use by individual consumers.
• Kestrel Advanced Weather Meters (5000-7000 series)

Named customers5 records

Segments6 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

Feature8 records

Partnerships

Five partnerships are on record, tiered core and minor.

• LiNK Third-Party Software PartnerscoreTechnology or IntegrationKestrel LiNK ecosystem includes integration with third-party software applications through the Kestrel Communications Protocol. Partners can integrate weather data from Kestrel devices via Technology Agreement. Includes ballistics data integration with Applied Ballistics bullet library.
• Applied BallisticscoreTechnology or IntegrationKestrel Ballistics products incorporate Applied Ballistics bullet library, providing comprehensive ballistics calculations for long-range shooting accuracy.
• ID.meminorChannel Partner/ Reseller/ DistributorIdentity verification service enabling government and group pricing discounts through the checkout process.
• Ambient Weather NetworkcoreTechnology or IntegrationCommunity weather monitoring network where Kestrel and weather station data can be shared. AWN+ subscription provides premium features.
• Training Partners (Accuracy 1st, Altus, Mile High, FTW Ranch)minorImplementation/ SI/ Consulting PartnerRecommended shooting training facilities for live Kestrel 5700 Elite meter training, including locations in Texas, Florida, Colorado, and internationally.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Vaisala: Vaisala is a global leader in industrial and professional weather, environmental, and industrial measurement instruments serving meteorology, aviation, defense, and life sciences; it competes with NK's higher-end KestrelMet and PVMet professional lines but operates at significantly larger scale across a much broader portfolio.
• Garmin: Garmin's fenix, Instinct, and outdoor wearables incorporate weather, barometric, GPS, and environmental sensors; while Garmin does not sell dedicated handheld weather meters, it overlaps with NK's outdoor athlete and weather-monitoring target customers with broader device ecosystems.

Direct peers

• Leupold & Stevens: Leupold manufactures riflescopes, rangefinders, and spotting scopes targeted at hunters and tactical shooters, competing with NK's Kestrel Ballistics line for the same precision-shooting and hunting customer base.
• La Crosse Technology: La Crosse Technology designs and sells consumer weather stations, atomic clocks, and environmental monitoring devices, overlapping directly with NK's Ambient Weather and KestrelMet product lines in both retail channels and online.
• Sig Sauer (Electro-Optics): Sig Sauer's KILO and BALLISTICS rangefinders and BDX ballistics ecosystem target the same long-range precision shooting and hunting applications as NK's Kestrel Ballistics and Applied Ballistics integration.
• Bushnell: Bushnell is a leading brand in shooting sports optics including rangefinders, binoculars, and sport optics, directly overlapping with NK's Kestrel Ballistics and rangefinding binocular products in the long-range shooting and hunting market.
• Davis Instruments: Davis Instruments manufactures Vantage Pro weather stations and a broad portfolio of portable weather and environmental measurement instruments, directly competing with Nielsen-Kellerman's Kestrel and Ambient Weather/RainWise lines across both consumer and professional segments.
• AcuRite (Chaney Instrument): AcuRite is a major US-based weather instrument and weather station brand competing directly with NK's Kestrel, Ambient Weather, and RainWise sub-brands in consumer and prosumer channels including big-box retail and e-commerce.

Others

• MagnetoSpeed (NK sub-brand): MagnetoSpeed is itself a Nielsen-Kellerman sub-brand offering barrel-mounted ballistic chronographs; it is included as a peer to acknowledge that NK already operates a direct muzzle-velocity measurement business alongside its Kestrel Ballistics weather-and-ballistics meters.

Emerging players

• WeatherFlow-Tempest: WeatherFlow (now Tempest) builds connected consumer and professional weather stations with a community data network, competing with NK's KestrelMet and Ambient Weather Network platform on networked weather monitoring and cloud-based analytics.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/nk_performance
• Facebookfacebook.com/nksportsperformance
• LinkedInlinkedin.com/company/nielsen-kellerman

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&A1 record

Investments

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

Frequently asked questions about Nielsen-Kellerman