{"product_id":"efmh-atex-funk-sendemodul-fuer-dehnungsmessbruecken","title":"EFMH ATEX wireless transmitter module for strain gauge bridges","description":"\u003cp\u003eThe \u003cstrong\u003eEFMH\u003c\/strong\u003e is an \u003cstrong\u003eATEX and IECEx-approved radio transmission module for strain gauge bridges\u003c\/strong\u003e. It measures the bridge signal from a load cell, force, pressure, or torque transducer and transmits it cyclically to X24 or T24 receivers – from the hazardous area, wirelessly.\u003c\/p\u003e\n\u003cp\u003eThe marking is \u003cstrong\u003eI M2 Ex ib I\u003c\/strong\u003e and \u003cstrong\u003eII 2G Ex ib IIC T4 Gb\u003c\/strong\u003e at \u003cstrong\u003eTa = −20 to +50 °C\u003c\/strong\u003e. This means the device is approved for \u003cstrong\u003eZone 1 and Zone 2\u003c\/strong\u003e. The electronics are housed in an IP67-rated enclosure with a battery holder. \u003cstrong\u003eOnly two Energizer L91 AA size lithium cells are permitted\u003c\/strong\u003e – this condition is stated in the approval, and cell replacement must not take place in an explosive atmosphere.\u003c\/p\u003e\n\u003cp\u003eThe input operates in a four-wire system with \u003cstrong\u003e5 V bridge excitation\u003c\/strong\u003e and accepts bridge resistances from 85 to 5000 Ω, up to four 350-Ω bridges in parallel. The measurement is bidirectional, thus detecting both tension and compression. Zero point drift a maximum of 4 ppm\/°C, gain drift a maximum of 5 ppm\/°C, non-linearity before linearization a maximum of 25 ppm of the measuring range. Calibration and linearization are performed in engineering units using the free Toolkit software.\u003c\/p\u003e\n\u003cp\u003eThe radio link operates on the license-free \u003cstrong\u003e2.4 GHz DSSS band\u003c\/strong\u003e with 10 mW and 15 channels; the transmit power is adjustable from 0 to 100 %. The \u003cstrong\u003erange of up to 800 m\u003c\/strong\u003e applies when both sides use a T24-ANTA antenna; against a receiver with an integrated antenna, it is around 600 m – measured in open field, transmitter on a 3-m mast, receiver 1.5 m above the ground. Battery life can be up to five years depending on the operating mode.\u003c\/p\u003e\n\u003ch3\u003eAdvantages at a Glance\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003eATEX and IECEx: I M2 Ex ib I and II 2G Ex ib IIC T4 Gb, Ta −20 to +50 °C\u003c\/li\u003e\n\n\u003cli\u003eApproved for Zone 1 and Zone 2\u003c\/li\u003e\n\n\u003cli\u003eIntrinsically safe electronics in IP67 housing, 76.6 × 59 × 31 mm plus 25 mm gland\u003c\/li\u003e\n\n\u003cli\u003eBridge excitation 5 V DC, 85 to 5000 Ω, four-wire system\u003c\/li\u003e\n\n\u003cli\u003eSensitivity ±3.1 mV\/V, version with 20 mV\/V available\u003c\/li\u003e\n\n\u003cli\u003eZero point drift max. 4 ppm\/°C, gain drift max. 5 ppm\/°C\u003c\/li\u003e\n\n\u003cli\u003ePower supply 2.1 to 3.6 V DC from two Energizer L91 AA cells\u003c\/li\u003e\n\n\u003cli\u003eBattery life up to 5 years depending on transmission interval\u003c\/li\u003e\n\n\u003cli\u003e2.4 GHz DSSS, 10 mW, up to 800 m in open field\u003c\/li\u003e\n\n\u003cli\u003eWorks with X24 and T24 receivers\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eImportant for system planning:\u003c\/strong\u003e X24 devices belong in the hazardous area, T24 devices in the safe area – \u003cstrong\u003eT24 modules must not be used in the Ex Zone\u003c\/strong\u003e. The \u003ca href=\"\/en\/products\/efmi-x24-hd\"\u003eEFMI ATEX Wireless Handheld Display X24-HD\u003c\/a\u003e serves as the receiver in the zone; all T24 receivers can be used in the safe area. The housing maintains IP67 only with cable diameters of 3.0 to 6.5 mm in the cable gland. Further Ex devices can be found under \u003ca href=\"\/en\/pages\/explosionsschutz-atex-iecex\"\u003eExplosion Protection ATEX \u0026amp; IECEx\u003c\/a\u003e.\u003c\/p\u003e","brand":"octogon GmbH","offers":[{"title":"Default Title","offer_id":57266203263302,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/EFMH_X24-ACMi-SA__titelbild.png?v=1788559697","url":"https:\/\/octogon-sensors.com\/en\/products\/efmh-atex-wireless-transmitter-module-for-strain-gauge-bridges","provider":"octogon GmbH","version":"1.0","type":"link"}