Switches are suitable for measuring non-harzard fluid medium and making level(one level or two level) control. Switches drive the microswitch to active by dint of spring elements. The merits of this switch include: Logical structure, smart, reliable, hi-frequence of on-off, good anti-vibration. According to the difference of objects, the switches can be devided into pressure switches with indicator and pressure without indicator(both have general type and anti-corrosion type). There are dead band adjusting devices in the two-level switches, to ensure the increasing set point and decreasing set point of the meidum which to be measured, within the reasonable range. There is signal lamp setup to emit light when control circuit turn-on or turn-off.

Set-point error: ± 1.5%(after calibration)
Repeatablity error: ≤ 1.5%
Indicating error: ± 4%
Control model: One-level nc
Two-levels no or nc
Set-point adjustable range (the upper limit of pressure range)
Switches with indicator: 15~100%
Switches without indicator: 20~75%
Dead band ( the upper limit of pressure range)
One level type(fixed): No greater than 10%
Two-levels type( adjustable): 10~30%
Electrical rating: AC 380V, 2A
DC 220V, 3A
Signal lamp working voltage: AC 380V or 220V
Insulation strength: 50Hz sine wave AC 2000V endure one minute.
Ambient temperature: -25ºC~70ºC
Ambient humidity: No greater than 90%
Temperature influnence: No greater than 0.8%/10ºC(application temperature departure 20± 5ºC)
Weight: 1kg

Remarks: Materials for measuring system of anti-corrosive type: Connection--0cr18ni9, spring pipe--3j53or 0cr17ni12m02