Special features
High reliability and long service life
Up to 4 switch contacts per instrument
Gauges with inductive contacts for use in hazardous areas with ATEX approval
Gauges with electronic contact for PLC applications
Contact gauges comply with DIN 16085
Description
Wherever the process pressure has to be indicated locally, and, at the same time, circuits are to be made or broken, the model PGS21.1x0 switchGAUGE can be used.
Switch contacts （electrical alarm contacts） make or break an electric control circuit dependent upon the position of the instrument pointer. The switch contacts are adjustable over the full extent of the scale range （see DIN 16085）, and are mounted predominantly below the dial, though also partly on top of the dial. The instrument pointer （actual value pointer） moves freely across the entire scale range, independent of the setting.
The set pointer can be adjusted using a removable adjustment key in the window.
Switch contacts consisting of several contacts can also be set to a single set point. Contact actuation is made when the actual value pointer travels beyond or below the desired set point.
The pressure gauge is manufactured in accordance with DIN 16085 and fulfils all requirements of the relevant standards （EN 837-1） and regulations for the on-site display of the working pressure of pressure vessels.As switch contacts magnetic snap-action contacts, reed switches, inductive contacts - for requirements to ATEX - or electronic contacts for triggering a PLC are available.For further information on the different switch contacts please see data sheet AC 08.01.
Standard version
Nominal size in mm
100, 160
Accuracy class
1.0
Scale ranges
0 … 0.6 to 0 … 600 bar
or all other equivalent vacuum or combined pressure and vacuum ranges
Pressure limitation
Steady: Full scale value
Fluctuating: 0.9 x full scale value
Short time: 1.3 x full scale value
Permissible temperature
Ambient: -20 … +60 °C
Medium: +80 °C maximum
Temperature effect
When the temperature of the measuring system deviates from the reference temperature （+20 °C）:
Max. ±0.4 %/10 K of full scale value
Process connection
Cu-alloy,
lower mount （LM） or lower back mount （LBM）
G ½ B （male）, 22 mm flats
Pressure element
< 100 bar: Cu-alloy, C-type
≥ 100 bar: Stainless steel 316L, helical type
Movement
Cu-alloy, wear parts argentan
Dial
Aluminium, white, black lettering
Pointer
Instrument pointer: Aluminium, black
Set pointer: red
Case
Stainless steel
Window
Polycarbonate
Bezel ring
Cam ring （bayonet type）, stainless steel
Electrical connection
Terminal box
Ingress protection
IP 54 per EN 60529 / IEC 529
Switch contacts
Magnetic snap-action contact model 821
No control unit and no extra power supply required
Direct switching up to 250 V, 1 A
Up to 4 switch contacts per measuring instrument
Inductive contact model 831
Long service life due to non-contact sensor
Additional control unit required （model 904.xx）
With corresponding control unit suitable for use in zone 1 /21 （2 GD） hazardous areas
Low effect on the indication accuracy
Fail-safe switching at high switching rates
Insensitive to corrosion
Up to 3 switch contacts per measuring instrument
Electronic contact model 830 E
For direct triggering of a programmable logic controller（PLC）
2-wire system （option: 3-wire system）
Long service life due to non-contact sensor
Low effect on the indication accuracy
Fail-safe switching at high switching rates
Insensitive to corrosion
Up to 3 switch contacts per measuring instrument
Reed switch model 851
No control unit and no extra power supply required
Direct switching up to 250 V, 1 A
Also suitable for direct triggering of a programmable logic controller （PLC）
Free from wear as without contact
Up to two change-over contacts per measuring instrument
Switching function
The switching function of the switch is indicated by function index 1, 2 or 3.
Model 8xx.1: Contact makes （clockwise pointer motion）
Model 8xx.2: Contact breaks （clockwise pointer motion）
Models 821.3 and 851.3: Change over; one contact breaks and one contact makes simultaneously when pointer reaches set point
For further information please see data sheet AC 08.01, electrical switch contacts
Options
Other process connection
Sealings （model 910.17, see data sheet AC 09.08）
Inductive contacts also in safety version （SN, S1N）
Dual scale
Higher medium temperature
Panel mounting flange, polished stainless steel
Surface mounting lugs on the back, stainless steel
Dimensions in mm
switchGAUGE model PGS21.100 with switch contact model 821, 831 or 830 E
switchGAUGE model PGS21.160 with switch contact model 821, 831 or 830E 
switchGAUGE model PGS21.100 with switch contact model 851.3 or 851.33 
switchGAUGE model PGS21.160 with switch contact model 851.3 or 851.33 
Ordering information
Model / Nominal size / Type of contact and switching function / Scale range / Connection size / Connection location / Options
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