The ZARC humidity tag reports relative humidity and temperature in real time from the same sensor, and alerts when either moves outside limits you set. The sensor can sit on the tag or at the end of a cable probe, so the reading comes from the duct, cavity, cabinet or archive box where the damp actually is.
01
Relative humidity only means something alongside the temperature it was measured at. Air at 20°C and 50% relative humidity is saturated if it cools to about 9°C, and any surface colder than that collects water. That is why the tag reports both, from one sensor, on every reading.
From those two readings the dashboard works out the dew point and flags when conditions put condensation at risk. Damp building up over days shows on the graph well before a limit is crossed.
The sensor is specified to the requirement. Tell us the humidity and temperature range the space sees and the tolerance you need, and the sensor is chosen to match. How often it reports, what it alerts on and how the dashboard presents it are all set to your requirement too.
02
Wherever moisture in the air damages what is stored, fitted or built there, the tag has a job. The uses below are a starting point; the same tag works in any space where damp or condensation does harm.
Paper, photographs, film and textiles are harmed by sustained damp and by rapid swings in humidity. A continuous record shows whether a store holds its conditions, and the export is the evidence for a conservation file or a lender's facilities report.
An enclosure that warms by day and cools at night draws in moist air and condenses it on terminals and boards. The result is corrosion and insulation faults that surface months later as unexplained trips.
Too humid, and condensation becomes a risk on cooled equipment. Too dry, and static discharge becomes one. High and low limits cover both ends of the band.
Below-ground rooms take on moisture from the ground and from warm air meeting cold walls. Humidity read alongside dew point helps tell a damp problem from a condensation problem before mould reaches stock or finishes.
Timber, paper, packaging, textiles and electronic components absorb moisture or corrode in damp air. An alert gives time to run dehumidification or move stock before it is written off.
New screeds, plaster and blockwork release water for weeks after they go in. Readings through the drying-out period show whether heaters and dehumidifiers are doing their job before floor finishes and joinery arrive.
Warm, saturated air from a pool condenses on cold structure and corrodes steelwork, fixings and ceiling voids. A rising trend shows when ventilation or dehumidification has fallen behind.
Unheated buildings collect condensation through the winter, and mould follows. Readings from inside show when heating or ventilation needs attention, without a visit to find out.
03
The tag runs on its own battery and needs no wiring to the building. Where the reading has to come from somewhere the tag cannot sit, the sensor goes there on a cable and the tag stays where it can be reached. Typical positions:
In a room, store, corridor or plant room, reading the air around the people and stock that use it.
Tag and sensor together inside an electrical cabinet, control panel, rack or display case.
The probe through the duct wall into the airstream, with the tag mounted outside.
The probe into a wall cavity, floor void, roof space or behind a lining, where damp builds out of sight.
The probe among archive boxes, on racking or inside a sealed container, reading conditions at the stock rather than across the room.
Outbuildings, lofts, shipping containers and site cabins, in an enclosure specified for the location.
04
Humidity and temperature are plotted together for every tag, with dew point alongside, so a slow rise over a week is as clear as a sudden jump. Minimum and maximum values are shown for any period you choose, and readings export for reports, insurers and conservation or maintenance records. The reading history is held on a UK-hosted dashboard or, where required, on servers on your own site.
You set high and low limits for humidity and for temperature on each tag. Readings arrive in real time at the interval you set, down to every minute, and when one crosses a limit the alert is raised straight away. It goes by email or SMS, and through an app where required, to the people you name, with escalation to further contacts.
05
The tag has a place anywhere damp costs money, stock or evidence. Sectors using it include:
Plant rooms, basements, risers and roof spaces across a building or a portfolio.
Damp and condensation in homes, void units and communal areas, recorded over time rather than judged on a single visit.
Humidity held inside the band that protects the equipment, at both ends.
Moisture-sensitive stock in stores, containers and distribution sites.
Cabinets and huts where condensation corrodes equipment nobody visits.
Stores and display cases whose conditions have to be evidenced for loans and insurance.
06
| Parameter | Specification |
|---|---|
| Measurements | Relative humidity (%RH) and temperature (°C) from one sensor |
| Derived values | Dew point, with condensation risk flagged in the dashboard |
| Accuracy and range | Specified to the requirement; sensor chosen to the tolerance you need |
| Sensor position | On the tag, or on a remote probe on a cable |
| Data | Real time, at a reporting interval configurable down to every minute |
| Alerts | High and low limits for humidity and temperature, set per tag |
| Alert delivery | Dashboard, email or SMS; app where required |
| Recipients | Named people and groups, with escalation to further contacts |
| Missed reports | A silent tag is flagged in the dashboard |
| Gateway power loss | Raises its own platform alert |
| Dashboard | Trends, minimum and maximum, export; views configured to your requirement |
| Data location | UK-hosted, or on servers on your own site |
| Power | Internal battery, up to five years depending on reporting interval |
| Radio | 433 MHz, one-way (transmit only) |
| Range | Site-dependent; confirmed by site survey before installation |
| Mounting | Wall, inside an enclosure, or probe into a duct or cavity |
| Enclosure | Standard or built to the site; bespoke moulding for volume orders |
| Charges | No per-alert, per-user or licence charges |
| Manufacture | Made to order in the UK |
| Certification | CE marked |
07
You tell us what the space holds, the conditions it must stay within and who needs to know.
We choose the sensor to the tolerance you need and set the limits, reporting interval and alert routes.
The tag goes on a wall or inside an enclosure. Where the reading is needed somewhere else, the probe goes there on its cable.
We check live readings on the dashboard and send a test alert to every recipient before handover.
Ready to get started? Every deployment begins with a site survey.
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Each reading goes over 433 MHz radio to a ZARC gateway, which passes it to the dashboard, where limits are checked and alerts sent. The tag has a transmitter and no receiver, so nothing can change its settings or reach it over the air.
For freezers and cold rooms, where temperature is the only measure that matters.
Water on the floor, where this tag reads moisture in the air.
Moisture in soil or a substrate rather than the air.
Warns when the dehumidifier or heating serving a space loses its supply.
Yes. Both come from the same sensor on every reading, so each humidity figure has the temperature it was taken at.
Yes. Readings reach the dashboard as they are taken, at the interval you set. The interval, the limits and the dashboard views are all configured to your requirement.
Yes. The sensor can sit on a cable probe in a duct, cavity or cabinet or among stored boxes, with the tag mounted where it can be reached.
The dashboard works out the dew point from the humidity and temperature readings and flags when conditions put condensation at risk.
The sensor is specified to the requirement. Tell us the range the space sees and the tolerance you need, and we choose the sensor to match.
Yes. You set high and low limits for humidity and for temperature on each tag, and choose who is alerted.
At the interval you set, down to every minute. A shorter interval uses more battery.
No. It runs on an internal battery for up to five years, depending on the reporting interval.
Yes. Humidity tags across every building and site report into the same dashboard, grouped the way you manage the estate.
No. There are no per-alert, per-user or licence charges.
Yes. Trends, minimum and maximum values and the full reading history export for reports, insurers and records.
Looking for something else?
Most sensing needs are met by a tag we already build, configured for your equipment. If yours needs a sensor or interface we don't list, we have the engineering to build it. Tell us what you need to measure, and we will tell you how we would do it.
Discuss your requirementTell us what is happening on site, what you need to see, and the event you need to hear about. We will come back with the system that answers it.
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Venator House, Unit 9, 15-17 St Stephen's Road, Bournemouth
Dorset, BH2 6LA · VAT GB 409644484
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Direct to the team that designs and builds the range. Tell us the equipment and the event that matters.