# Metal mass detectors | Magnetic loop vehicle detector URL: https://www.stagnoliaccessories.com/en/sliding-gates-safety/loop-detector Fonte: Stagnoli T.G. S.r.l. (Stagnoli Accessories), Lonato del Garda (BS), Italia Aggiornato: 2026-11-06 > We make sensors that detect metal masses through a magnetic loop. Detectors suitable for industrial areas, car parks and residential areas. ![Automatic barrier at an entrance with a magnetic loop in the asphalt](https://www.stagnoliaccessories.com/theme_stagnoli_accessories/static/src/img/ctx-spira-sbarra.webp) Magnetic loop detectors # Metal mass sensors They recognise vehicles and ignore the rest. DIN rail mounting. [Request a quote](https://www.stagnoliaccessories.com/en/contacts?tema=sicurezza&prodotto=Sensori%2Bmasse%2Bmetalliche) [Technical data](https://www.stagnoliaccessories.com/en/sliding-gates-safety/loop-detector#specifiche) **12–24 V** ac/dc **1 / 2** channels **DIN** mounting **Dip-switch** programming **Loop** magnetic **2** models At a glance ## What are metal mass sensors Stagnoli metal mass sensors detect vehicles through a magnetic loop embedded in the paving. They are used in industrial areas, car parks and residential areas, to open barriers and gates or to book the green on traffic light control units. DA035 is two-channel, DA021 single-channel; both run on 12–24 V ac/dc, mount on DIN rail and are quickly programmed via dip-switch. - Models: DA035 · DA021 - Channels: 2 (DA035) · 1 (DA021) - Power supply: 12–24 V ac/dc - Mounting: DIN rail - Programming: Dip-switch - Detection: Magnetic loop (not included) - Use: Industry, car parks, residences - Control units: VIACONTROL, ACNSEM3L, Saturno Models ## One or two channels. ![DA035 two-channel metal mass sensor](https://www.stagnoliaccessories.com/theme_stagnoli_accessories/static/src/img/da035.webp) DA035 DA035 Two-channel metal mass sensor, 12–24 V ac/dc, designed for DIN rail, simple and quick dip-switch programming. 2 channels DIN ![DA021 metal mass sensor](https://www.stagnoliaccessories.com/theme_stagnoli_accessories/static/src/img/da021.webp) DA021 DA021 Single-channel loop detector, 12–24 V ac/dc, for green booking on traffic light control units. 1 channel DIN Fields of application ## Where they are installed. Wherever you need to detect a vehicle and not a person. ![Automatic barrier with loop](https://www.stagnoliaccessories.com/theme_stagnoli_accessories/static/src/img/ctx-spira-sbarra.webp) ### Barriers and industrial entrances The loop opens the barrier and keeps it open while the vehicle is over it. DA035 ![Residential ramp](https://www.stagnoliaccessories.com/theme_stagnoli_accessories/static/src/img/app-rampa-v2.webp) ### Alternating one-way systems Green booking on traffic light control units. DA035 + VIACONTROL ![Car park entrance](https://www.stagnoliaccessories.com/theme_stagnoli_accessories/static/src/img/app-parcheggio.webp) ### Car parks Counting vehicles in and out with Saturno. DA035 + Saturno Specifications ## Technical data. ### Electronics - Power supply: 12–24 V ac/dc - Channels: 1 o 2 ### Installation - Mounting: DIN rail - Programming: Dip-switch ### Detection - Sensor: Magnetic loop (not included) - Objects: Metal masses Frequently asked questions ## Magnetic loops, in practice. **D: What is the difference between DA035 and DA021?** DA035 is two-channel, DA021 is single-channel. **D: Does it also detect pedestrians and bicycles?** No: the magnetic loop detects metal masses, i.e. vehicles. To recognise pedestrians as well, there is the PRAP radar, which classifies objects by size. **D: How is it programmed?** Via dip-switches on the product, simply and quickly. **D: What warranty does it have?** 12 months for B2B purchases and 24 months for consumers, from the date of the purchase document, under Stagnoli's general terms of sale. Alternative products ![PRAP sensor](https://www.stagnoliaccessories.com/theme_stagnoli_accessories/static/src/img/prap.webp) [PRAP sensor](https://www.stagnoliaccessories.com/en/sliding-gates-safety/industrial-presence-sensors.md)No cuts in the asphalt, recognises the direction of travel. ![VIACONTROL](https://www.stagnoliaccessories.com/theme_stagnoli_accessories/static/src/img/viacontrol.webp) [VIACONTROL](https://www.stagnoliaccessories.com/en/light-signalling/traffic-light-control-units/smart-traffic-light-controller.md)DIN-rail control unit for 2 traffic lights Technical insights ## Instructions and support for metal mass sensors. [Manuals **User manuals** Product instructions](https://www.stagnoliaccessories.com/en/docs/manuals.md) [Support **Open a ticket** Answered by our technical department](https://www.stagnoliaccessories.com/en/support?p=DA035) ## Loops for your entrance Tell us how many lanes and which automation: we'll recommend sensors and loop installation. [Contact us](https://www.stagnoliaccessories.com/en/contacts?tema=sicurezza&prodotto=Sensori%2Bmasse%2Bmetalliche) [+39 030 9139511](tel:+390309139511)