The reed-switch 201 is a fast making or breaking special switch that is operated with a permanent magnet. It can be used for switching low voltages in the mV or mA range, but also for relatively high switching currents. The way it is designed, the pointer can still move foreward on the scale without a change in the switching function.

    Technical details and options of model RCha 63 in standard version can be found on data sheet 1210 and general information leaflet 1010. These data are also valid for the reed-switch version, as far as there are no deviating information below. But reed-switch gauges are only available without case filling.

    Most special configurations as described on data sheet 1210 are also available for gauges with reed-switches, particularities upon request.

   Nominal Case Size
    63 (2 ½")

   Safety Features
    Standard version with bottom connection with 1" blow-out in the backside of the case; for all the other case configurations available with reed-switch (r, rm, Rh, rRh, rmRh, rFr, rBFr): top blow-out assembly

   Minimum Pressure Ranges
    Every pressure gauge needs a sufficient amount of torque to operate a limit-switch contact with minimized error. For model RCha 63 with reed-switch a minimum range of 2.5 bar or 30 psi (also compound ranges) has to be considered.

    A removable key for adjusting the set point from outside (through the window; window: persplex glass) is optionally available.

   Make / Break Operations
    Switching is requested when the pointer is moving inclockwisedirection (e.g. rising pressure or decreasing vacuum; standard-version):

        R1 making     or     R2 breaking

    Switching is requested when the pointer is moving counterclockwise
    (e.g. decreasing pressure or rising vacuum):

       R4 making     or     R5 breaking

    Building in 2 reed-switches is possible in any combination of above mentioned switching functions.

    The minimum distance between the 2 set points is 25% of the full scale value.
To guarantee an accurate switching function it is very important to order the required switching direction properly, because the switching hysteresis has to be considered.

    Characteristically for a reed-switch is the fact that after a switching contact took place, the pointer can still move foreward on the scale without a change in the switching function.

   Electrical Data
    Max. switching capacity 10 W (DC) or
                            10 V (AC)
    Max. switching voltage  < 75 V DC
                            < 50 V AC
    Max. switching current 0.5 A DC or AC with resistive load
    Switching hysteresis max. 2.5 %

   CE-marking
    According EMC Directive, restricted to max. 5 switchings/minute

   Temperature Limitation
    For the reed-switch: -30 °C (-22 °F) up to + 75 °C (167 °F)
    For the temperature limitations of the pressure gauges please compare data sheet 1210 and general information leaflet 1010.

   Safety Instruction

    Instruments with reed-switch may not be applied close to any strong magnetic fields (e.g. resistance welders).

   Examples for Ordering Information:
    • RCha 63-1, 4 bar, ¼" BSP (resp. G¼B), R1
    • RCha 63-1, rFr, 6 bar, ¼" NPT, R21
    • RCha 63-3, rFr, 25 bar, ¼" NPT, R24

    The position of the cable entry is shown in the dimensional drawings below.Other positions for the cable entry only upon request (extra charges!).