Murphy Electric Gage and Swichgage - Manual (Page 2)

Sharper Accuracy. Higher Durability. Advanced Technology.
The EG21 Series Electric Gage and the EGS21 Series Swichgage instrument take the electric gage to new
heights with proven state of the art technology and reliability.
Electric Swichgage instrument
The EGS21 Series Swichgage instrument has all of the features of the EG21 Series Gage plus an adjustable
set point PowerHall ® Effect switch output for operating alarms or equipment shutdown. The trip point is
adjustable over 90% of the scale and has a set point indicator visible from the gage face. Now you can have
both, the ease of electric gage installation and the reliable switching of Murphy’s famous Swichgage instrument.
2-1/4 in.
(57 mm)
1-15/16 in. (49 mm)
1-15/16 in.
(49 mm)
2-1/2 in. (64 mm) clearance for adjustment / Wiring
3/4 in. (19 mm) max. Panel Thickness.
Reflective
Mirror Band
2-1/16 in. (52 mm)
Mounting hole diameter.
SWICHGAGE ® Contact
Adjustment, 1/16 in. hex
SWICHGAGE ® Adjustable Contact Indicator
Push-on Plug and Wire Leads
18 AWG (1.0 mm
2 ); 8 in. long (203 mm)
Mounting
Clamp
kPa
PSI
50 75
100 0
0
25
350
700
Specifications
P Po ow we err IIn np pu utt,, a allll m mo od de ells s a an nd d s se en nd de err:: 12 VDC or 24 VDC.
C Ca as se e:: Polyester (PBT), impact and weather resistant with screw-on mounting clamp.
B Be ezze ell:: Polished 316 stainless steel standard; available in black. SAE style optional.
L Le en ns s:: Clear Polycarbonate and UV stabilized.
A Aiirr C Co orre e M Mo ov ve em me en ntt:: Silicon dampened pointer.
D Diia all:: Black with white markings; back-lite (marking becomes red when illuminated);
dual scale with mirror band to reduce parallax reading errors.
S Sw wiic ch hg ga ag ge e iin ns sttrru um me en ntt S Se en ns so orr:: PowerHall ® Effect; outputs ground signal (sinking output) rated:
300 mA continuous (EGS21 models). Pressure, Fuel, Volts set on decreasing scale.
Temperature and Amps set on increasing scale. Output saturation voltage (voltage drop
across switch): 1.3-2.3 Volts @ 25°C (may require some conditioning to work with logic inputs)
S Sw wiic ch hg ga ag ge e iin ns sttrru um me en ntt S Se ett P Po oiin ntt IIn nd diic ca atto orr:: Visible on mirror band (scale);
adjustable from the back of the unit (1/16 in. hex type wrench).
W Wiirriin ng g:: Plug connector with wire leads, 18 AWG (1.0 mm 2 ), 8 in. (203 mm) long.
O Op pe erra attiin ng g T Te em mp pe erra attu urre e:: -40 to 185°F (-40 to +85°C).
S Stto orra ag ge e T Te em mp pe erra attu urre e:: -77 to 185°F (-60 to 85°C).
O Ov ve err V Vo olltta ag ge e ((G Ga ag ge e M Mo ov ve em me en ntt)):: Withstands 200% of nominal system voltage for 5 min. Meets SAE J1810.
R Re ev ve errs se ed d P Po olla arriitty y ((G Ga ag ge e M Mo ov ve em me en ntt)):: Withstands reversed battery terminal polarity indefinitely within
operating temperatures.
E En nv viirro on nm me en ntt a an nd d T Te es stt:: Meets SAE J1810 standards.
PowerHall ® is a registered trademark of Allegro MicroSystems, Inc.
Dimensions
▼ EG Air Core movement design
▼ Technological improvements in lighting,
accuracy in reading and wiring installation
▼ Assurance of highest reliability and service
▼ Environmentally sealed design
▼ Exceeds the rigid SAE J1810 standard
▼ Corrosion-resistant materials .
▼ Desirable for marine and other environmentally
sensitive applications
▼ Soft, non-glare dial and pointer illumination
by “cold light” LED.