The Spacemaster SM8000 series of sensors from Telco require no optical lenses and are virtually unaffected by water, dust and dirt. They are well suited for applications such as turbidity measurement and level control in food, paper and effluent applications.
The 8000 series consists of a self-contained transmitter SMT and a receiver SMR which are to be used in through-beam mode, an SMP for diffuse proximity, SMRR for retroreflective and an SMPF for use with fibre-optic cables. All are offered with sensitivity adjustment via integral potentiometer with either cable or plug connection.
The complete series is available either as three-wire, NPN or PNP transistor output, with a 10-30 V d.c. supply voltage, or as two-wire, SCR with a 20-250 V a.c. supply voltage, both offering switch-selectable light or dark function. The control input in the 10-30 V d.c. SMT is intended to be used for disabling or enabling the transmitting power temporarily for test purpose or for multiplexing applications.
The DC series is protected against reverse polarity of power supplies, control input and output signals. The output is protected against short circuit and inductive loads.
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