What Greystone Energy Systems does

Greystone Energy Systems Inc. is a Canadian manufacturer of HVAC sensors and transmitters for building automation and energy management systems, founded in 1980 and headquartered in Moncton, New Brunswick. The company produces a comprehensive portfolio spanning temperature, humidity, pressure, flow, power, indoor air quality, gas detection, and water detection categories, offered across analog, BACnet/Modbus networked, and wireless MESH connectivity platforms. Specialized application lines target cleanrooms, horticulture, and high-accuracy precision environments; notable engineering features include a battery-operated wireless MESH system in which every transmitter acts as a self-repeating node, eliminating external repeater hardware, and high-accuracy humidity/temperature transmitters with digital linearization and temperature compensation (HTX2/HTX3 series).

The company operates a sales-led, channel-driven distribution model. Primary distribution runs through authorized distributors and contractors serving commercial and light industrial projects, supplemented by dedicated Canada/USA and international sales teams. Prospect conversion is quote-driven via a request-a-quote workflow on the website, supported by trade shows, content marketing, and social media presence. Pricing is not publicly disclosed. Greystone holds ISO 9001 (quality), ISO 14001 (environmental, through Intertek), and UL product safety certifications, and its net-zero emissions targets have been validated by the Science Based Targets initiative (SBTi) as part of the Bemsiq Group.

Greystone is a privately held subsidiary of Bemsiq AB, which is itself a subsidiary of Sweden-listed Investment AB Latour (Latour Industries AB). The relationship with Bemsiq dates to 2021, and in August 2024 Latour expanded its North American sensor footprint by acquiring Quatrosense Environmental Ltd (QEL), a gas detection specialist, broadening Greystone's reach into hazardous and combustible gas sensing. A new 78,000-square-foot global headquarters in Moncton opened in September 2025, doubling prior facility capacity and signaling continued investment in manufacturing scale.

Name

Greystone Energy Systems

Legal name

Greystone Energy Systems Inc.

Website

https://greystoneenergy.com

Company type

Private

Founded year

1980

Operating status

Operating

Headcount range

101–250 employees

Short description

Greystone Energy Systems is a Canadian manufacturer of HVAC sensors and transmitters for building automation, serving commercial and light industrial markets through distributors, contractors, and dedicated sales teams across North America and internationally. Privately held under Sweden's Latour Industries AB.

Ownership category

akta.pro rank

Product category

Building Automation Sensors and Transmitters

NAICS

Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512)

SIC

Electronic & Other Electrical Equipment (No Computer Equip) (3600), Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585)

akta.pro primary industry

Controls, Thermostats, Sensors & Building Automation (HVAC Controls) (IMADANAH)

akta.pro secondary industries

Building Thermal Controls & Building Management Systems (HVAC BMS) (IMAHAKAK), HVAC Controls & Optimization (Smart Thermostats, VAV, Chillers/Boilers Controls) (BPABAGAB)

Keywords

• HVAC sensors
• Building automation
• Transmitters
• Indoor air quality
• Gas detection

Headquarters

HQ city

Moncton

HQ country

Canada

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. HVAC Sensors and Transmitters: Greystone generates revenue through the manufacture and sale of HVAC sensors and transmitters. Their extensive product portfolio spans temperature, humidity, pressure, flow, power, air quality, gas detection, and water detection categories for building automation systems. Products are sold through distributors, contractors, and direct sales channels.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

Greystone Energy Systems manufactures and sells HVAC sensors and transmitters for building automation and energy management systems. Its portfolio covers temperature, humidity, pressure, flow, power, indoor air quality, gas detection, and water detection devices offered in analog, BACnet/Modbus, and wireless MESH variants, with specialized Cleanroom and Horticulture lines. Products are sold through distributors, contractors, and direct sales teams to commercial and light industrial building automation customers.

Product overview

Greystone Energy Systems is a manufacturer of HVAC sensors and transmitters for building automation and energy management systems. The company offers a comprehensive portfolio of over 40 years of manufacturing expertise. The product line centers on environmental monitoring devices including temperature, humidity, pressure, flow, air quality, gas detection, and water detection sensors and transmitters. Products are offered across multiple connectivity platforms: standalone transmitters with analog outputs, BACnet/Modbus network-enabled versions, and wireless MESH sensors. Specialized product lines include High Accuracy series for precision applications, Cleanroom monitors for laboratory environments, and Horticulture transmitters for greenhouse applications. The WLD Series Water Detectors and PWR Series power monitoring products round out the offering for commercial and light industrial building automation projects.

Differentiator

Problem solved

Functional benefit

Brands

• Bemsiq Group: Parent company group that Greystone Energy Systems is a part of since 2021

Products and services

• Temperature Transmitters HVAC temperature transmitters, including versions with LCD display, for building management systems and direct digital control integration.
• High Limit Thermostats Temperature monitoring devices that activate when high temperature thresholds are exceeded in HVAC applications.
• Low Limit Thermostats Temperature monitoring devices that activate when low temperature thresholds are exceeded in HVAC applications.
• Passive Temperature Sensors Passive temperature sensing elements for HVAC monitoring applications.
• Humidity Transmitters HVAC humidity measuring transmitters for building management and environmental control.
• Humidity/Temperature Transmitters Combined humidity and temperature measurement transmitters for comprehensive environmental monitoring.
• Condensation Sensors Sensors designed to detect condensation conditions in HVAC and building applications.
• Dewpoint Transmitters Transmitters measuring dewpoint temperature for humidity control in HVAC applications.
• Dry Pressure Transmitters Pressure transmitters for dry media applications in HVAC systems.
• Wet Pressure Transmitters Pressure transmitters designed for wet media applications with conduit connectivity options.
• Flow Transmitters Flow measurement transmitters for HVAC and building management systems.
• Current Switches Current sensing switches for power monitoring in HVAC equipment.
• Current Sensors Current measurement sensors for electrical load monitoring in building systems.
• Signal Interfaces Signal conversion and interface products for integrating HVAC sensors with building management systems.
• IAQ Multi-Sense Multi-function indoor air quality monitoring device combining multiple IAQ measurements in a single unit.
• Carbon Dioxide Sensors CO2 sensors for indoor air quality monitoring and demand-controlled ventilation.
• VOC Sensors Volatile Organic Compound sensors for indoor air quality monitoring.
• Particulate Matter Sensors Sensors for measuring particulate matter concentrations in indoor air quality applications.
• Gas Detection Products Toxic, combustible and refrigerant gas detection products for safety monitoring in commercial and industrial applications.
• WLD Series Water Detectors Water detection devices available in single or dual channel configurations with three sensing types (spot, remote spot, or conductivity cable) and IP65 weatherproof enclosure.
• Cleanroom Transmitters Specialized environmental monitoring transmitters for cleanroom applications maintaining precise temperature, humidity and pressure conditions.
• Horticulture Transmitters Environmental monitoring transmitters designed for greenhouse and controlled environment agriculture applications.
• High Accuracy Temperature Products High precision temperature measurement products for applications requiring exceptional accuracy and long-term stability.
• High Accuracy Humidity Products High precision humidity measurement products for applications requiring exceptional accuracy and long-term stability.
• High Accuracy Pressure Products High precision pressure measurement products for applications requiring exceptional accuracy and long-term stability.
• Wireless MESH Sensors Wireless MESH network sensors that can be fully battery-operated. Each transmitter acts as a repeater, removing the need for external repeater units in the network.
• Cleanroom Transmitters (BACnet/Modbus) Specialized network-enabled transmitters for cleanroom environmental monitoring with BACnet and Modbus connectivity.
• Horticulture Transmitters (BACnet/Modbus) Network-enabled environmental transmitters designed for greenhouse and horticulture applications with BACnet and Modbus support.
• BACnet/Modbus Temperature Transmitters Network-enabled temperature transmitters supporting BACnet and Modbus protocols for building automation and direct digital control systems.
• BACnet/Modbus Humidity/Dewpoint Transmitters Network-enabled humidity and dewpoint transmitters for building automation systems with BACnet and Modbus connectivity.
• BACnet/Modbus Pressure Transmitters Network-enabled pressure transmitters supporting BACnet and Modbus protocols for HVAC pressure monitoring applications.
• BACnet/Modbus Air Quality Sensors Network-enabled indoor air quality sensors for building automation systems with BACnet and Modbus connectivity.
• BACnet/Modbus Gas Detection Network-enabled gas detection products for hazardous gas monitoring in commercial and industrial building automation applications.
• HTX2 and HTX3 Series Humidity/Temperature Transmitters High accuracy humidity and temperature transmitters with digital linearization and temperature compensation for environmental monitoring in critical applications.
• PWR Series Power Monitoring Products Power monitoring products now available with conduit connectivity for industrial HVAC applications.

Segments3 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Two partnerships are on record, tiered core.

• Quatrosense Environmental Ltd (QEL)coreStrategic or Co-development Partner · 8 August 2024Latour, through its wholly-owned subsidiary Bemsiq AB, acquired 100% of shares in Quatrosense Environmental Ltd (QEL). QEL is a pioneer within the gas detection space established in 1986 with almost 40 years of experience. This acquisition expands Greystone's capabilities in hazardous and combustible gas sensing technology.
• Bemsiq GroupcoreOthersGreystone is a proud Bemsiq Group company since 2021. Bemsiq AB is a subsidiary of Investment AB Latour, which owns Greystone Energy Systems Inc.

Scale indicators4 records

Recent moves8 records

Expansion highlights6 records

Broad incumbents

• Johnson Controls: Johnson Controls is a major building automation and HVAC systems incumbent (including the Tyco/BCPro legacy) offering sensors and controllers within its Metasys and OpenBlue platforms. It competes for the same building automation and energy management projects as Greystone.
• Siemens Smart Infrastructure: Siemens offers building automation/HVAC sensors and controllers through its Smart Infrastructure division (Desigo CC platform). Comparable in target market (commercial/industrial building automation) and in offering network-enabled HVAC sensors with BACnet integration.
• Schneider Electric: Schneider Electric's EcoStruxure platform spans building automation, sensors, and energy management. It targets similar commercial customers and competes with Greystone on network-enabled HVAC sensors and integrated BMS solutions.
• Honeywell International: Honeywell is a global building automation and HVAC controls incumbent with a broad portfolio of sensors, thermostats, and BMS platforms. It competes with Greystone at the integration-platform level and supplies comparable sensing products to similar commercial/industrial customers.

Direct peers

• KMC Controls: KMC Controls is a manufacturer of building automation controllers and network sensors (BACnet/Modbus). It directly overlaps Greystone's network-enabled sensor offerings and serves the same building automation integrator market.
• Veris Industries: Veris Industries is a dedicated manufacturer of HVAC sensors, transducers, and current switches for building automation. It is the closest direct peer to Greystone in product scope, customer base (distributors, contractors, facility engineers), and business model.
• Setra Systems: Setra Systems designs and manufactures pressure, air quality, and HVAC sensing products for commercial and cleanroom applications. Overlaps Greystone in pressure, humidity, and cleanroom sensor categories with a similar OEM and contractor go-to-market.
• Building Automation Products Inc. (BAPI): BAPI manufactures HVAC sensors, thermistors, and transmitters for building automation. It serves the same distributor/contractor channel as Greystone with comparable temperature, humidity, and air quality sensor products.
• Automation Components Inc. (ACI): ACI is a manufacturer of sensors and transducers for building automation, including temperature, humidity, pressure, gas, and current sensing products. Directly comparable product line and distribution channels to Greystone.

Others

• Quatrosense Environmental Ltd (QEL): QEL is a gas detection product specialist acquired by Greystone's parent Bemsiq AB in August 2024. As a sibling company under the same parent, it is thematically related (complementary sensing) rather than a competitor; useful as a portfolio/expansion reference point for Greystone's gas detection line.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat6 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xtwitter.com/inc_greystone?lang=en
• YouTubeyoutube.com/channel/UCkEEKlkJG_7G2QWSTVdxEHA
• Facebookfacebook.com/greystoneenergy/?rf=648679455230771
• LinkedInca.linkedin.com/company/greystone-energy-systems-inc-
• Instagraminstagram.com/greystoneenergy

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries1 record

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 Greystone Energy Systems