Products suitable for surface applications

Data Transmission

Fibre optic transmission, FSK SAP Transmission, Instrinsucally Safe Ethernet Switch & Media Converter and Modbus Communications.

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WiPan Conveyor Pullkey Monitoring

In today’s quarrying industry, trained engineering resource is costly and faults on a conveyor pullkey system can result in extended and unnecessary stand time. By integrating WiPAN technology into the pullkey, the condition of the emergency stop system is transmitted wirelessly to the main control

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Conveyor Stop / Emergency Stop Pull Key Systems

The Minewatch HT 800 Series pull key range is designed for use in safety critical systems for controlling conveyors. Each key can therefore be used as either a Stop Switch or as a Category 2 or Category 3 Emergency Stop Switch as defined in BS EN ISO13849-I PLe.

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Pull Wire, Pull Cable and Accessories

Effective for emergency situations and routine operations alike, Davis Derby's MineWATCH range of pull cable / pull wire operated safety switches are the ideal stopping devices for all conveyor systems.

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Belt Alignment Switch

This robust belt alignment switch unit is designed to give consistent and reliable operation when used in the most demanding of environments such as the conditions encountered in mines and quarries.

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Blocked Chute Probe

The Blocked Chute Probe is a versatile sensing device with a wide range of applications in mining and the materials and bulk handling industries.

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Heavy Duty Back Spillage Detector

The Heavy Duty Back Spillage Detector is designed to prevent spillage of conveyed mineral around transfer points and chutes.

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Belt Alignment and Tear Device

The Belt Alignment and Tear unit is deemed intrinsically safe to the ATEX standard. The complete transducer comprises of two identical units, one positioned each side of the conveyor to be protected.

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Digital Sequence and Slip Roller

Davis Derby MineWATCH technicians designed the Digital Belt Sequence and Slip Roller to make conveyor sequencing easy and detect belt slip. As well as preventing spillages from your conveyor system, this module can also give early warning of potential belt fires.

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MineWATCH PS21-D

Flameproof/ Dual Intrinsically Safe (2x12Vdc @ 500mA each) Power Supply with 120/240v ac input (other input voltages available).

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MineWATCH PS21-RD

As per MINEWATCH PS21-D but including 6 Intrinsically Safe to Flameproof Interposing Relays for the control of mining flameproof switchgear.

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MineWATCH PS21-BD

As per MineWatch PS21-D but including an 8A/Hr battery packs to create an uninterruptible Power Supply Unit.

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MineWATCH PS21 BD/B

As MINEWATCH PS21-D but including an 8A/Hr battery pack to create an Uninterruptible Power Supply Unit with the addition of analogue output monitoring capabilities of the battery unit.

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