Wireless monitoring for timber, concrete and industry

Measure where it matters.

Install in minutes.Monitor for years.

Wireless temperature, humidity and infrared sensors for the places you cannot reach twice: inside a timber member, cast into concrete, in a cold room, on a busbar. Installed in a day, reporting every ten minutes for ten years.

Order a Demo Set How the system works

Ø24 × 42.85 mm, IP68: Fits a 24 mm drill hole in timber or concrete; can be cast into the fresh pour.
Up to 10 years on one battery: CR2 lithium cell at a 10-minute reporting interval.
868 MHz radio, up to 300 m: Every packet carries ID, sequence number, battery and signal strength.
4G, Wi-Fi or solar gateway: Up to 50 sensors per gateway, no site network or mains required.

SNTH wireless temperature and humidity sensor, yellow ribbed cylinder, Ø24 mm

Ø 24 mmstandard 24 mm drill

IP68 housing, 30 gCR2 battery, up to 10 years

42.85 mmsits in a 45 mm hole

Vented capair reaches the sensor element

Where the sensors go

The same Ø24 mm sensor goes into the material itself. The readings describe the element, not the air around it.

Sensor seated in a 24 mm hole drilled into a glulam beam marked 4291 — **In the timber**A Ø24 mm hole, 45 mm deep, closed with a wooden plug. The sensor reads the climate inside the member and the platform converts it to wood moisture content.

Worker placing a sensor into a freshly poured concrete slab — **In the concrete**Cast directly into the fresh pour or set into a drilled hole. The radio passes through the reinforced slab; the data drives maturity and drying calculations.

SNIT infrared sensor on an adjustable bracket clamped to a rail — **On the busbar**The infrared sensor points its 5° field of view at a joint, bearing or pipe and trends the surface temperature without contact.

One system from the sensor to the report

Battery sensors report by 868 MHz radio to an outdoor gateway. The gateway forwards over 4G or Wi-Fi to sensornetwork.cloud, where the data is charted, alarmed, exported and analysed.

Sensors SNTH and SNIT

Ø24 mm, IP68, CR2 battery for up to 10 years. Every 10 minutes each sensor sends its reading together with its ID, sequence number, battery voltage and signal strength.

Gateway SNGW04

Receives up to 50 sensors, time-stamps and buffers the data (470,000 hours of records) and forwards it over 4G LTE or Wi-Fi. Mains, 6–26 V DC or a 20 W solar panel; 10-day internal battery.

sensornetwork.cloud

Live dashboard, alarm thresholds per sensor or group with SMS, e-mail and push notification, full history, CSV and XLSX export, API. Nothing to install.

Page of a timber moisture monitoring report with trend charts

Analysis reports

Position-level findings from the live data: trends, extremes, offsets, outages, link quality, wood moisture or concrete maturity. Written for engineers, insurers and owners.

Three products, one radio

Two sensors and a gateway. Any combination can be configured; a 50-point network is planned, installed and verified in one working day.

SNTH temperature and humidity sensor

Fits a 24 mm hole in timber, concrete or a wall; also cast directly into fresh concrete or placed freely on a shelf.

Accuracy (typ.): ±0.2 °C, ±2 % RH
Range: −20 to +60 °C, 5–100 % RH
Housing: Ø24 × 42.85 mm, 30 g, IP68
Battery: CR2 lithium, up to 10 years

SNTH in detail per sensor, excl. VAT

SNIT infrared temperature sensor

Non-contact surface temperature of live or moving parts, with the ambient temperature measured alongside.

Infrared range: 0–300 °C, ±3 °C, 5° field of view
Ambient: −35 to +85 °C, ±0.1 °C
Housing: IP68, adjustable mounting bracket
Battery: Lithium, up to 10 years

SNIT in detail per sensor, excl. VAT

SNGW04 gateway

Receives up to 50 sensors, time-stamps and buffers the data, forwards it over 4G or Wi-Fi. Three models: 4G, 4G with Wi-Fi, and 4G with a 20 W solar panel.

Housing: 55 × 121 × 171 mm, 300 g, IP68
Sensor radio: 868 MHz, 300 m open space, about 100 m indoors
Power: 6–26 V DC, 220–240 V AC or solar; 10-day battery
Local storage: 470,000 h of records, USB-C download

Gateway in detailFrom , excl. VAT

Two materials that hide their problems

Moisture damage in timber and strength development in concrete both happen out of sight and on their own schedule. A sensor inside the material turns both into a measured record.

Wood moisture inside the member

Decay starts above 20 % wood moisture and is typically found years later, when remediation costs run into six figures. SNTH sensors in Ø24 mm holes measure temperature and humidity inside the timber. The platform converts the readings to moisture content for the species, warns at 18 % and keeps the record insurers and certifiers ask for.

Reference: timber lattice tower74 positions instrumented, 62 sensors reporting every 10 minutes since September 2026. Median wood moisture 10.7 %, no sensor above the 18 % watch threshold, data completeness above 93 %.

Timber monitoring

Wood moisture chart in sensornetwork.cloud: four sensors in per cent moisture content with watch and alert bands

SNTH sensor embedded in a broken piece of hardened concrete

Curing and drying, measured from inside the pour

Stripping, post-tensioning and flooring usually wait for the calendar, not for the concrete. A sensor cast into the fresh pour reports temperature and humidity from inside the slab for months. The platform computes maturity and strength by the equivalent-age method (ASTM C1074) and detects the two points that matter: when the pore structure has stabilised and when intensive hydration is over.

C35/45 slab, Bulgaria, 2026Sensor cast in on 21 May. Humidity fell from saturation to 90 %; the strength estimate reached 97.5 % of the design value after three and a half months. Radio through the reinforced slab at RSSI 82–103.

Concrete monitoring

The same system, ten more places

Each of these has a rule or a standard that asks for a continuous record. The sensors and the gateway do not change; only the alarm thresholds and the report do.

Timber structuresEurocode 5 service classes, DIN 68800-2
Concrete curingEN 13670, ASTM C1074 maturity, screed drying
Pharma and food storageEU GDP, EN 12830, HACCP
Server rooms and telecom sheltersASHRAE TC 9.9, uptime SLAs
Museums and churchesEN 15757, Bizot guideline
Agriculture and storageHay self-heating, grain hot spots, cellars
Industrial infraredVdS 2858, DGUV V3, predictive maintenance
Drying and restorationDIN 18560 readiness, insurer documentation
Care homes and housingHeat-protection plans, mould evidence
Tunnels, dams and bridgesCuring, leak detection, DIN 1076 context

See it, alarm it, export it

sensornetwork.cloud runs in the browser on a PC, tablet or phone. Users and roles are set per customer; there is nothing to install.

Live dashboard: Current value, sparkline, battery, signal and last-seen time for every sensor.
Alarms that reach you: Minimum, maximum, battery, signal and missing data per sensor or group, sent by SMS, e-mail or push.
History and comparison: Charts over any period, several sensors on one axis, CSV and XLSX export, API on request.
Material models: Wood moisture by species and concrete maturity with automatic drying points, computed from the same readings.

Platform details Open sensornetwork.cloud

sensornetwork.cloud: wood moisture view with sensor list and species selection

What you get per measuring point

The lowest cost per point among embeddable, long-life sensors, with an outdoor 4G or solar gateway as part of the system.

Embeddable: Ø24 mm and IP68: inside timber, cast into concrete, under flooring. Commodity indoor sensor boxes cannot go there.
Ten-year battery: No battery rounds in showcases, roofs or towers. The sensor outlasts a research project or a warranty period.
Outdoor 4G or solar gateway: No site network and no mains needed. The 10-day battery keeps alarming through a power failure.
Quality data: Sequence counter, signal strength and battery in every packet separate link problems from sensor problems. 93 % completeness proven on a 62-sensor timber tower.
One supplier: Sensors, platform, installation plan and the position-level report from the same engineers.
Re-usable: Sensors and gateways move on to the next object; the data is exportable at any time. 24-month warranty.

Start with your own data in ten days.

The Demo Set (one gateway, three sensors, three months of software) is delivered within ten working days and commissioned remotely. Send a sketch or floor plan and the coverage plan comes back within three working days.

Phone: +359 888 920 108
E-mail: info@sitech.consulting
Office: 66B Manastirski Livadi Street, 1404 Sofia, Bulgaria