The Rotork Soldo BM / TB is a proximity bolt switch for hazardous areas with Exd or Exia protection methods, designed for linear valves and general purpose applications. The TB version has an integrated junction box.


| Models | BM: proximity bolt switch / TB: proximity bolt switch with integrated junction box |
| Material | BM: AISI 316 stainless steel / TB: 316 stainless steel, with stainless steel or aluminium junction box |
| Switch Options (Order Code) | C4: magnetic SPDT hermetically sealed switch (suitable for Ex ia) / N1: magnetic proximity SPDT hermetically sealed, silver plated snap acting contacts |
| Sensing | Magnetic or ferrous sensing |
| Flying Leads | BM: standard length 450 mm |
| Frequency Range | BMN1: max 30 Hz / BMC4: max 100 Hz |
| Protection Rating | BM: IP66 / IP68 / TB: IP67 / NEMA 4 and 4X on request |
| Subsea | Available on request, tested up to 300 bar / optional subsea cable and connector for underwater link |
| Operating Temperature | -40 to +80 °C (-40 to +176 °F) |
| Hazardous Area Approvals | ATEX, EAC: Ex II 2GD Ex d IIC T6/T5/T4 Gb, Ex tb IIIC T80°C/T95°C/T115°C Db / ATEX, IECEx (only for BM switch): Ex II 1GD Exia IIC T4 Ga Exia IIIC T135°C Da, Ta = -40 °C ≤ Ta ≤ 90 °C |
| UL Approval (BMC4 only) | Class I, Division 1 and 2, Groups A, B, C and D / Class II, Division 1 Groups E, F and G / Class II Division 2, Groups F and G |
| SIL Certificate | Up to SIL 3 approval on request |