Delta-t Devices
Delta-T Devices Ltd is a privately held UK manufacturer (founded 1971) of precision environmental sensors and data loggers — including soil moisture probes, weather stations, and plant science instruments — sold globally to academic researchers, commercial growers, and conservation organizations via direct sales and distributors.
- Company typePrivate
- Founded1971
- HeadquartersBurwell, United Kingdom
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What Delta-t Devices does
Delta-T Devices Ltd is a privately held UK-based designer and manufacturer of precision environmental sensors and monitoring systems, founded in 1971 and headquartered in the Burwell/Cambridge area with 11-50 employees. The company sells six core product categories — Soil Science, Wireless & Data Loggers, Plant Science, Meteorology, Solar Energy, and Horticulture & Irrigation — built around the SDI-12 v1.3 digital communication protocol that enables up to 62 sensors to network with a single GP2 Advanced Data Logger. Its portfolio includes patented sensors such as the PR2 Profile Probe (multi-depth soil moisture to 1 metre) and the ML3 ThetaProbe (±1% research-grade accuracy), plus the new March 2025 Celora W15 wireless telemetry unit that connects SDI-12 sensors to the proprietary DeltaLINK-Cloud platform over 4G LTE cellular networks with NFC mobile app configuration.
Delta-T monetizes primarily through hardware sales of sensors, data loggers, weather stations, plant science instruments (AP4 Porometer, WinDIAS 4, SS1 SunScan), and accessories, supplemented by a DeltaLINK-Cloud subscription stream and software licensing for the DeltaLINK configuration tool. Pricing is quote-based with no public disclosure; customers transact via direct sales ([email protected]) or through a global network of official overseas distributors, with Dynamax handling the USA market. The company exhibits at major international events including British Potato Event, Fruit Attraction, Meteorological Technology World Expo, ASA/CSSA/SSSA, and REAP Conference, and maintains a multilingual website in 11 languages.
The customer base is diversified across academic and research institutions (University of Zagreb, Cranfield University, Rothamsted Research, Jena Experiment, University of Surrey), commercial horticulture growers, sports turf operators (Fulwell Golf Course), conservation NGOs (Ecostudies Institute, Local Ocean Conservation), and the solar energy sector. Notable partnerships include STRI (Sports Turf Research Institute) for co-authored user guides, the EU-funded Flow Aid Project, and BSI ISO quality certification (2020). The company holds no external venture capital or private equity investment and is described as independently and likely founder-owned, operating as a stable, niche-focused specialist in research-grade environmental instrumentation.
Delta-t Devices firmographics
Firmographics- Name
- Delta-t Devices
- Legal name
- Delta-T Devices Ltd
- Website
- https://delta-t.co.uk
- Company type
- Private
- Founded year
- 1971
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Delta-T Devices Ltd is a privately held UK manufacturer (founded 1971) of precision environmental sensors and data loggers — including soil moisture probes, weather stations, and plant science instruments — sold globally to academic researchers, commercial growers, and conservation organizations via direct sales and distributors.
- Ownership category
- akta.pro rank
Delta-t Devices industry classification
Industry- Product category
- Precision Environmental Sensors
- NAICS
- Other Measuring and Controlling Device Manufacturing (334519), Navigational, Measuring, Electromedical, and Control Instruments Manufacturing (3345)
- SIC
- Industrial Instruments For Measurement, Display, And Control (3823), Instruments For Meas & Testing Of Electricity & Elec Signals (3825)
- akta.pro primary industry
- In-Field Sensor Hardware (Soil Moisture/Nutrient, Weather, Canopy Sensors) (AFABAMAA)
- akta.pro secondary industries
- Environmental Sensors (Temperature/Humidity/Gas/Air Quality) (HDAHALAD), Environmental & Safety Monitoring Instruments (Air quality, emissions, radiation, noise, gas detection) (IMAGAFAJ), Irrigation Monitoring & Sensors (Flow/Pressure Meters, Soil Moisture, Water Quality Sensors) (AFABAHAJ)
Keywords
Where Delta-t Devices is headquartered
LocationHeadquarters
- HQ city
- Burwell
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
Delta-t Devices business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Personnel, Supply Chain, Technology or R&D, Marketing or Sales, Infrastructure, Operations
Revenue model
- Hardware Sensors: Sale of precision environmental sensors including soil moisture sensors (ML3, SM150T, WET150, PR2), weather stations, plant science instruments (AP4 Porometer, WinDIAS 4), and meteorological sensors. Products are sold directly and through distributors globally.
- Data Loggers: GP2 Advanced Data Logger and Controller, GP1 Data Logger, DL6 Data Logger, and Celora W15 Wireless Unit sales. These form the data collection backbone for sensor networks.
- DeltaLINK-Cloud Subscription: Cloud-based data viewing and management platform with subscription model for ongoing platform access, data storage, and software updates.
- Accessories and Spares: Cables, connectors, mounting hardware, batteries, memory cards, access tubes, augering equipment, and replacement parts for sensor and logger systems.
- Software Licenses: DeltaLINK software for data logger configuration and management, including SDK for custom application development.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | — | B2B hardware sales with quote-based pricing |
Go-to-market motion2 records
Distribution channels2 records
Marketing channels5 records
Delta-t Devices product offering
Product offeringCore offering
Delta-T Devices designs, manufactures, and sells precision environmental sensors and monitoring systems, including soil moisture sensors (ML3, SM150T, WET150, PR2 Profile Probe), data loggers (GP1, GP2, DL6), weather stations, plant science instruments (AP4 Porometer, WinDIAS 4, SS1 SunScan), and solar radiation sensors. Its offerings are integrated with the DeltaLINK-Cloud platform and SDI-12 sensor networking for research, commercial horticulture, and environmental monitoring applications.
Product overview
Delta-T Devices offers a comprehensive portfolio of precision environmental sensors and monitoring systems organized across six core product categories: Soil Science (soil moisture sensors, water potential sensors, and data loggers including WET150, SM150T, ML3 ThetaProbe, PR2 Profile Probe, EQ3), Wireless & Data Loggers (GP2 Advanced Data Logger and Controller, GP1 Data Logger, DL6 Data Logger, Celora W15 Wireless Unit, DeltaLINK-Cloud platform), Plant Science (AP4 Porometer for stomatal conductance, WinDIAS 4 Leaf Image Analysis System, SS1 SunScan canopy analysis), Meteorology (weather stations WS-GP2 and MaxiMet GMX501, temperature probes ST1-05/ST4-05/MT2-05/AT2-02, humidity sensors RHT-SDI12-T6/RHTP-SDI12-T6, solar radiation sensors including ES4 pyranometer, GS1/M-10 solarimeter, BF5 sunshine sensor, SPN1 sunshine pyranometer, QS6 quantum sensor, UV sensors, wind sensors AN-WD2/AN1/AN3/AN-SDI12-03/WD-SDI12-03/WD1, rain gauges RG1+BP-06/RG2+BP-06/RG2+M-06), Solar Energy (NR2-07 solar radiation sensor, SPN1 for PV monitoring), and Horticulture & Irrigation (moisture sensors WET-2/WET150/SM150T/PR2, portable kits including ML3 ThetaKit/WET Kit/SM150 Kit/WET150 Kit, wireless units and data loggers). The GP2 Advanced Data Logger and Controller serves as the core platform, enabling SDI-12 sensor integration, irrigation relay control, Script Editor-based customization, and DeltaLINK-Cloud connectivity across soil science, meteorology, and horticulture applications.
Differentiator
Problem solved
Functional benefit
Products and services
- WET150 Multi-Parameter Soil Sensor Digital multi-parameter soil sensor measuring moisture, temperature, and pore water electrical conductivity (EC) with an SDI-12 interface and detachable extendable cable; for commercial growers and researchers.
- SM150T Soil Moisture Sensor Stable and accurate (±3%) soil moisture sensor with a 5-year warranty; robust and buriable design for continuous field deployment across research and commercial applications.
- ML3 ThetaProbe Research-grade soil moisture sensor offering ±1% accuracy for volumetric water content measurement with soil temperature sensing capability.
- PR2 Profile Probe Soil moisture profile probe measuring at multiple depths down to 1 metre, available in PR2/4 and PR2/6 variants; uses patented sensing technology with minimal salinity or temperature influence.
- GP2 Data Logger Advanced data logger and controller with 12 differential (or 24 single-ended) channels, SDI-12 compatibility, onboard relays for irrigation control, Script Editor for custom logic, and USB/RS232/ethernet/modem connectivity options.
- GP1 Data Logger Versatile 7-channel data logger with irrigation control capability, supporting up to 4 soil moisture sensors with onboard relay for automated irrigation control.
- DL6 Data Logger 8-channel weatherproof data logger designed for use with soil moisture sensors in field and remote monitoring deployments.
- HH2 Moisture Meter
- Celora W15 Wireless Unit Wireless SDI-12 telemetry unit providing real-time cloud connectivity for sensor networks via 4G LTE cellular, featuring NFC mobile app configuration, supporting up to 8 SDI-12 sensors per unit with DeltaLINK-Cloud integration.
- DeltaLINK-Cloud Online data viewing and management platform enabling remote access to sensor data, custom charts, widget dashboards, automated alerts, and data sharing across distributed sensor networks.
- AP4 Porometer Stomatal conductance meter for measuring plant leaf transpiration rates; for use in plant physiology research.
- WinDIAS 4 Leaf Image Analysis System Image analysis system for leaf disease assessment and canopy documentation; used by plant pathologists and agronomy researchers.
- SS1 SunScan Canopy Analysis System Canopy analysis system for measuring photosynthetically active radiation (PAR) distribution within crop canopies; for agricultural research and crop science.
- WS-GP2 Weather Station Complete weather station based on the GP2 Advanced Data Logger, integrating meteorological sensors for comprehensive environmental monitoring.
- MaxiMet GMX501 Compact Weather Station Compact all-in-one weather station integrating temperature, humidity, pressure, wind speed/direction, and precipitation sensors.
- WET-2 Sensor Multi-parameter sensor measuring water content, electrical conductivity, and temperature directly within the root zone for horticulture applications.
- ML3 ThetaKit Complete portable soil moisture measurement kit including ML3 ThetaProbe sensor, HH2 readout meter, insertion tool, spare rods, and carry case; for sports turf and field measurement.
- WET150 Kit Portable soil measurement kit featuring the WET150 multi-parameter sensor for moisture, EC, and temperature measurement in horticulture field settings.
- EQ3 Soil Water Potential Sensor Sensor for measuring soil water potential for irrigation scheduling and soil physics research applications.
- SPN1 Sunshine Pyranometer Research-grade sunshine pyranometer measuring total solar radiation and sunshine duration for photovoltaic monitoring and scientific applications.
Quantifiable outcome
- Up to 60% water savings achievable without reductions in yield or decline in quality
- +3 more outcomes
Companies that use Delta-t Devices
Customer profileNamed customers11 records
Segments6 records
Ideal customer profiles4 records
Delta-t Devices technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature7 records
Delta-t Devices partnerships and signals
Strategic signalPartnerships
Five partnerships are on record, tiered quality, core and notable.
- BSI (British Standards Institution)qualityDelta-T Devices holds BSI ISO quality management certification, demonstrating commitment to quality standards in manufacturing and operations.
- DynamaxcoreDynamax serves as the official USA distributor for Delta-T Devices. They exhibit together at American industry events including CANVAS 2025 and ASA/CSSA/SSSA Annual Meeting.
- STRI (Sports Turf Research Institute)notableSTRI, the leading international sports turf consultancy providing advice to around 2,100 sports clubs and leisure facilities annually, co-authored the ThetaKit User Guide with Delta-T Devices.
- Flow Aid ProjectnotableDelta-T Devices was extensively involved in the 3-year EU-funded Flow Aid Project focused on finding new approaches to irrigation scheduling and farm management in Mediterranean countries. Delta-T soil moisture sensors and data loggers were used at test sites to schedule irrigation.
- SDI-12 Standard ConsortiumcoreDelta-T Devices products conform to the industry standard SDI-12 (v1.3) specification, enabling integration with third-party SDI-12 sensors and data loggers from many manufacturers.
Scale indicators4 records
Recent moves6 records
Expansion highlights6 records
Delta-t Devices competitors and assessment
Company assessmentEmerging players
- CropX Technologies: CropX is a digital agronomy platform combining soil moisture sensors with cloud analytics and decision-support, representing a software-anchored emerging competitor to Delta-T's sensor-plus-DeltaLINK-Cloud offering.
Direct peers
- METER Group: Formerly Decagon Devices, METER Group is a US-based manufacturer of research-grade soil moisture sensors (TEROS, EC-5) and data loggers, directly competing with Delta-T in academic and commercial soil-moisture measurement applications.
- Irrometer Company: Irrometer manufactures soil water potential (tensiometer) and moisture sensors widely used in irrigation scheduling and horticulture, comparable to Delta-T's EQ3 and WET sensor families.
- Stevens Water Monitoring Systems: Stevens manufactures soil moisture and environmental monitoring sensors (HydraProbe) for agriculture, research, and water resource applications, comparable to Delta-T's ML3, WET150, and meteorological lines.
- Acclima: Acclima manufactures TDR soil moisture sensors (SDI-12 interface) for irrigation and research, competing head-to-head with Delta-T's ThetaProbe and WET150 in precision irrigation.
- Campbell Scientific: Campbell Scientific designs rugged data loggers (CR1000X, CR6) and environmental sensors used across meteorology, agriculture, and research, directly competing with Delta-T's GP2 and DL6 loggers and meteorological sensor portfolio.
- Sentek: Sentek (Australia) makes multi-depth soil moisture probes such as Drill & Drop and EnviroSCAN used in agriculture and research, overlapping directly with Delta-T's PR2 Profile Probe and SM150T use cases.
Broad incumbents
- Davis Instruments: Davis Instruments offers Vantage Pro weather stations and EnviroMonitor soil sensor stations used by growers and researchers, representing a broader-incumbent competitor in Delta-T's WS-GP2 and meteorological category.
- Vaisala: Vaisala is a large industrial incumbent in meteorological and environmental measurement (weather stations, humidity, solar radiation), overlapping with Delta-T's MaxiMet, ES4 pyranometer, and humidity sensor lines but at a much broader portfolio scale.
Regional players
- AquaCheck: AquaCheck (South Africa) produces multi-depth soil moisture probes for irrigation and research in Africa, Europe, and Australia, providing a regional alternative to Delta-T's PR2 profile probe offering.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Delta-t Devices social profiles
Digital presenceDelta-t Devices compliance and trust
Trust signalCompliance1 record
Delta-t Devices financial estimates
Financial estimateRevenue estimate
Valuation estimate
Delta-t Devices leadership team
Management profileNumber of profiles
Profiles1 record
Delta-t Devices funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Delta-t Devices M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Delta-t Devices
What does Delta-t Devices do?
Delta-T Devices designs, manufactures, and sells precision environmental sensors and monitoring systems, including soil moisture sensors (ML3, SM150T, WET150, PR2 Profile Probe), data loggers (GP1, GP2, DL6), weather stations, plant science instruments (AP4 Porometer, WinDIAS 4, SS1 SunScan), and solar radiation sensors. Its offerings are integrated with the DeltaLINK-Cloud platform and SDI-12 sensor networking for research, commercial horticulture, and environmental monitoring applications.
Is Delta-t Devices a public or private company?
Delta-t Devices is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Delta-t Devices founded?
Delta-t Devices was founded in 1971. It employs 11 to 50 people.
Where is Delta-t Devices based?
Delta-t Devices is headquartered in Burwell, United Kingdom, in the Europe region.
How does Delta-t Devices make money?
Five revenue lines are on record. Hardware Sensors are the primary driver. The others are data Loggers, deltaLINK-Cloud Subscription, accessories and Spares and software Licenses.
Who are Delta-t Devices's main competitors?
CropX Technologies is listed as an emerging player. Direct peers are METER Group, Irrometer Company, Stevens Water Monitoring Systems, Acclima, Campbell Scientific and Sentek. Broad incumbents are Davis Instruments and Vaisala. AquaCheck is listed as a regional player.
Does Delta-t Devices have an API?
No public API is recorded for Delta-t Devices.
What industry is Delta-t Devices in?
Delta-t Devices's product category is Precision Environmental Sensors. Its primary akta.pro industry code is AFABAMAA, In-Field Sensor Hardware (Soil Moisture/Nutrient, Weather, Canopy Sensors), with a secondary code of HDAHALAD, Environmental Sensors (Temperature/Humidity/Gas/Air Quality). Its NAICS code is 334519 and its SIC code is 3823.