You bring the problem — what is happening on site, what you need to see, and the event you need to hear about. We deliver the whole system that answers it: the tag on your equipment, the ZARC network it reports over, the dashboard you watch, and the alerts that reach you. We design, build and own every layer of that stack, and manufacture it to order in the UK — no middleman, and nothing resold. The tags below are the range we build those solutions from.
ZARC® is a registered UK trade mark of IoT Technologies Ltd, no. UK00004271222.
01
Every deployment is two parts: a tag on the asset and a node that gives it coverage. The tag reads the equipment's state; the node carries that reading back over low-power radio. Nodes connect by SIM, Ethernet or solar, so a site with no mains and no fibre can still report.
02
A tag attaches to almost any equipment that presents a readable state of change — a contact that opens, a pressure that drops, an output that triggers. That includes older analogue kit with no digital output of its own, and equipment from any manufacturer: nothing here is tied to one vendor's ecosystem. Where an interface is unusual, we adapt the firmware to it. If the equipment shows its state, it can be digitised.
03
A tag sends; it does not receive. That is a deliberate engineering decision rather than a limitation. The tag transmits but does not receive, so it cannot be remotely reconfigured or attacked over the radio interface. It also means the radio only wakes to transmit, which is why a tag can run for years on a battery in a position nobody wants to revisit. Fewer states, fewer failure modes, and behaviour you can predict on site.
04
Alerts are part of the service, not charged per message. Every tag in the range can raise one: a reading tag when its value crosses a threshold you set, an event tag the moment the state changes. You decide what matters and where the line sits.
These read a value continuously — a pressure, a level, a concentration, a current — so you can see it over time and be alerted the moment it crosses a threshold you set.
Every tag in the range both monitors and alerts. The difference between these two groups is what the tag reads: a continuous value, or a change of state.
Reports pressure in a cylinder, line, vessel or system as a continuous reading in bar, psi or the unit you work in, and alerts on high and low limits and on pressure that is slowly falling or slowly rising. Fits anything that carries a pressure gauge.
View tagReports barometric pressure, the pressure of the atmosphere at a site, in real time with trends and rate-of-change alerts. Used as the context for ground gas readings, level sensors, test records and approaching weather.
View tagReports the difference in air pressure between two points: across a filter or fan, or between a room and the corridor outside. Shows when a filter is loading, air has stopped moving or a room has lost its pressure.
View tagReports temperature as a continuous reading and flags when it moves outside the range you set. Used on cold stores, plant rooms, server rooms and any process with a safe operating band.
View tagReports relative humidity and temperature from one sensor, with dew point worked out in the dashboard, so damp and condensation are caught before they cause corrosion, mould or spoilage. The sensor can sit on the tag or on a probe in a duct, cavity or cabinet.
View tagReports how wet the ground or a substrate is, from a probe buried or inserted in it, with wetting and drying trends over time. Used in soil, earthworks, landscaping and building materials.
View tagReports the fill level of a tank or vessel as a continuous reading, so a slow draw-down or an unexpected drop is visible without a site visit. Used on fuel, water, chemical and process tanks.
View tagReports sound level in dB(A) in real time, with the maximum, minimum and peak, and alerts when a site gets too loud or a unit goes quiet. Small enough to sit inside the equipment it listens to. Level only, never audio.
View tagSamples the movement of a structure over time and reports the average, maximum and minimum, so sway and slow change are both on record. Used on masts, towers, cranes and temporary works, and as evidence for insurance and warranty claims.
View tagReports light level in lux in real time, showing whether a space is lit, dark or changing. Used to catch failed lighting, lights left on, and light inside a cabinet or store that should be dark.
View tagReports what is in the air in real time: particulates, volatile organic compounds, nitrogen dioxide, ozone and other pollutants, built to the ones that matter on your site. Complementary environmental monitoring, not a certified safety instrument.
View tagReports CO₂ concentration in parts per million in real time, the plain measure of whether a room is ventilated for the people in it. Also used in cellars, gas stores and growing rooms. Complementary monitoring, not a certified life-safety detector.
View tagReports CO concentration in parts per million in real time and flags a rising level to people who are not on site. Fitted where fuel is burned or engines run. Complementary monitoring alongside certified CO alarms and gas detection, never in place of them.
View tagReports H₂S concentration in parts per million in real time. Used on wastewater, drainage and industrial sites for odour, corrosion and awareness of a rising level, as complementary monitoring rather than certified gas detection.
View tagReports a resistance reading from a connected element, in ohms or scaled to the quantity it represents. Used with resistance temperature probes, level and position senders and sensing cables, and to show a circuit going open or short.
View tagCounts the pulses from a meter or output you already have and reports use over time, turning a water, energy or process meter into live data. Alerts on flow when there should be none, and on none when there should be some.
View tagThese watch for a single change of state — a contact opening, water appearing, an alarm activating — and alert you the moment it happens.
Reports whether a pump, fan, motor or other load is running from the AC current it draws, and alerts the moment it stops or runs when it should not. Continuous current readings are available as a bespoke project.
View tagReports the moment a supply goes off at a circuit, board or piece of equipment, and again when it returns. Works on any supply, single-phase or three-phase. Continuous voltage and power readings are available as a bespoke project.
View tagReports off site the moment a fire panel or suppression system changes state: fire, fault, discharge or low pressure. Reads the outputs the system already provides, or senses heat itself where there is no system. Complementary monitoring; it does not replace certified fire signalling.
View tagTells people off site that a smoke detector has triggered. Reads the detector's own output, or senses smoke itself where there is no detector to read. Complementary monitoring alongside certified detection, never in place of it.
View tagDetects the presence of water on a floor or in a bund and reports the moment it appears. Used in plant rooms, comms rooms, basements and anywhere an escape of water does quiet damage.
View tagReports when a piece of equipment is lifted, moved, tilted or knocked from its position, such as an extinguisher or a defibrillator. Used for tamper and unexpected-movement alerts.
View tagReports when a door, gate, hatch, cabinet or lid opens and closes, and warns when one is left open or ajar or opens outside its permitted hours. Every opening is timed and logged, per door and across an estate.
View tagSends an alert the moment a person presses it, giving a simple manual way to raise attention from the field. Provided as complementary alerting, not a certified personal-safety or telecare device.
View tagReads a volt-free contact on almost any third-party equipment and relays its open/closed state-change off-site. This is the general-purpose way to bring existing kit that only signals locally into the dashboard.
View tagReads the state-change of a customer's existing local alarm and relays it off-site, so an alarm that only sounds on site is also seen remotely. The application is alarm monitoring; it adds visibility and does not replace certified life-safety signalling.
View tagUses a PIR (passive infrared) sensor to detect the body heat of a person or animal moving within its field of view, and alerts on the event rather than reporting a reading. Where the crystal motion tag reports that a piece of equipment has been moved, this one reports that something has moved nearby. Used for presence and intrusion awareness in rooms, compounds, cabinets and unoccupied areas.
View tagLooking 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 requirementA family of build-to-order monitoring and alerting tags that digitise the state of equipment you already own and report it to a live dashboard. Each tag reads one measurement or state and sends it one way to you.
A whole solution. You tell us the problem and the data you need; we deliver the complete system — the tag, the ZARC network, the dashboard and the alerts — built around your equipment.
No. We design and build our own hardware, firmware, software and network, and manufacture to order in the UK. There is no middleman.
Both. We ship solutions we have built before, ready to deploy, or adapt the range to your specific site — either way it is made to order in the UK.
Yes. A tag attaches to almost any equipment that presents a readable state of change, including a general-purpose dry-contact tag for kit that only signals locally.
Because a tag that only ever transmits is simpler, safer and more predictable. It is fitted to a piece of equipment to report that equipment's state, and nothing more. The tag transmits but does not receive, so it cannot be remotely reconfigured or attacked over the radio interface. It also means the radio only wakes to transmit, which is why a tag can run for years on a battery in a position nobody wants to revisit. An inbound radio path would add power draw, complexity and failure modes we have no interest in carrying.
Yes. Alerts are part of the service and are not charged per message. Every tag in the range alerts: those that read a value alert when it crosses a threshold you set, and those that watch for an event alert the moment the state changes.
No. On fire, smoke and gas, ZARC gives complementary, best-endeavours off-site visibility alongside your certified life-safety equipment. It adds visibility; it does not replace certified signalling.
Tell 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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Products contact
Direct to the team that designs and builds the range. Tell us the equipment and the event that matters.