
The TEK 871 LR extends the TEK 871's intrinsically safe ATEX platform to tall tanks and long-range vessels. Rated UL913 C1D1 Zone 0, it brings cellular LTE monitoring to large-format hazardous liquid storage. Pair it with Rivio for a complete fleet cloud dashboard — live levels, GPS, job detection, and alerts.
The TEK 871 LR is the long-range variant of the TEK 871 — an ATEX intrinsically safe cellular ultrasonic sensor combining the TEK 822 and TEK 865 in a single unit, now optimized for tall tanks with greater beam distance. C1D1 Zone 0 certified for fuel, solvent, and flammable liquid monitoring at scale.
The LR variant extends the ultrasonic beam range beyond the standard TEK 871, making it suitable for tall vertical tanks, deep fuel storage, and large chemical vessels.
Carries the same C1D1 Zone 0 certification as the TEK 871 — designed for environments with continuous flammable gas or vapor presence.
Integrates the TEK 822 sensor and TEK 865 data logger into one unit. Reduced component count means fewer connections in a hazardous zone.
Transmits readings from inside the hazardous zone over LTE — no gateway, no additional infrastructure required at the tank.

The TEK 871 LR handles hazardous-zone sensing and LTE transmission for tall vessels. Rivio handles the cloud, fleet visibility, and automated workflows.
The C1D1 Zone 0 sensor measures liquid level in tall or large tanks — even where flammable atmospheres are present continuously — and transmits over LTE.
GPS position, job state (loading, delivering, idle, discharge complete), volume tracking, and equipment identity are added to every sensor reading automatically.
Dispatchers, managers, and drivers see live levels across every TEK 871 LR-equipped asset — on map, on mobile, with threshold alerts.
| Capability | TEK 871 LR Standalone | TEK 871 LR + Rivio |
|---|---|---|
| ATEX / C1D1 Zone 0 long-range sensing | ✓ | ✓ |
| Extended ultrasonic beam for tall tanks | ✓ | ✓ |
| Cellular LTE data transmission | ✓ | ✓ |
| Live cloud fleet dashboard | ✕ | ✓ |
| Real-time GPS tracking per asset | ✕ | ✓ |
| Automatic job state detection | ✕ | ✓ |
| Volume tracking per run (intake/discharge) | ✕ | ✓ |
| SMS / email / push threshold alerts | ✕ | ✓ |
| Multi-asset fleet view | ✕ | ✓ |
| Historical run reports & compliance logs | ✕ | ✓ |
| API & dispatch system integration | ✕ | ✓ |
The TEK 871 LR handles your largest and most hazardous vessels. Rivio connects them to your entire operation.
Monitor tall above-ground fuel tanks at petroleum depots and distribution centers. C1D1 safety with long-range accuracy across the full tank height.
Track large chemical storage tanks where both intrinsic safety and extended vertical range are required. Real-time level with no manual checks.
Fuel transport trucks with larger tanks benefit from LR range. C1D1 certification meets flammable liquid transport requirements.
Tall industrial process vessels — solvent recovery, chemical feedstock, petroleum intermediates — where a single sensor must span the full vessel height.
Unmanned remote sites with large fuel or chemical reserves. LTE transmission keeps Rivio updated without on-site infrastructure.
Automated timestamped volume and level records across all TEK 871 LR assets — ready for environmental and safety regulators on demand.
The TEK 871 LR is the long-range variant — optimized for taller tanks with a greater ultrasonic beam distance. Both share the same ATEX C1D1 Zone 0 certification and cellular LTE platform.
ATEX certified and rated UL913 Class I Division 1 Zone 0 — the highest hazardous area rating, covering continuous flammable gas or vapor presence.
The LR variant extends the ultrasonic range beyond the standard TEK 871. Contact Rochester Sensors for exact beam distance specifications for your vessel.
Yes. Rivio handles mixed fleets — you can have TEK 871 on smaller hazardous tanks and TEK 871 LR on larger vessels, all in one dashboard.
Yes. Rivio handles mixed sensor deployments — TEK 871 LR on C1D1 fuel tanks, TEK 811 on C1D2 liquid trucks, both visible in the same live map.
Contact us with your tank type, size, and hazardous area classification. We'll confirm whether TEK 871 LR or another sensor is optimal and scope your Rivio configuration.
Tell us about your large hazardous-area tanks and we'll show you how Rivio connects TEK 871 LR sensor data to your whole operation.
Also available: TEK 811 · TEK 811 LR · TEK 871