Magnetized
Indicating Pointer
140 A freeze-proof sensing device is available for the
160 45LHE Series level SWICHGAGE® . The freeze- proof device inserts directly into the tank wall. The 45LHEFP sensor is stainless steel with a Buna-N rolling diaphragm.
Applications
The 45HE Series SWICHGAGE® models accurate- ly and reliably measure, indicate and control pres- sure, temperature and level in applications such as gas compressor control panels, pumping applica- tions, industrial process applications.
45HE models are available for specific applications such as monitoring oil well lead lines, storage tank levels, automatic ON/OFF pump control, etc.
Features
PLC and Solid State Compatible
The Normally Open and Normally Closed ver- sions of the 45HE Series are suitable for Murphy (and others) solid state TATTLETALE® annunci- ators and logic controllers, PLC’s and micro- processor-based controllers.
Low Switch Start-Up Override
A standard toggle switch is provided (N.O. and N.C. surface mounted models) to override the low switch during equipment start-up.
Latching Control Relay (BP Model) The 45HEBP Series includes a latching control relay for automatic ON/OFF control, either direct- ly or through a motor starter.
Freeze-proof Sensing (FP Model)
FRANK W. | ® | 45HE-95116B |
| | Revised 12-96 |
| MFR. | Catalog Section 05/10/15 |
| (00-02-0221) |
| |
| | |
4-1/2 in. (114 mm) Dial Size Hall Effect SWICHGAGE®
45HE Series
■Proven Hall Effect Switch Technology for Pressure, Temperature and Level Applications
■Easy-to-Adjust Alarm or Shutdown Set Points
■Normally Open or Normally Closed Systems
■Superior Switching Accuracy and Flexibility
■Ideal for DC Powered Solid State Controllers
■Tough Die Casted Aluminum Housing
■Explosion-Proof Case Available
Description
The 45HE Series SWICHGAGE® is a monitoring and alarm/shutdown device for industrial require- ments. It combines state-of-the-art Hall effect switching and analog indication for Pressure, Temperature or Level applications depending on the model used.
The 45HE is ideal for use with DC powered solid state controllers because it operates with Normally Open or Normally Closed Systems from 4.5 to 28 VDC. 120 VAC On-Off control available in Latching Control Relay (BP) models. Most 45HE models are available in surface mount or panel mount case designs. Dials are dual scale, single scale, and custom dials are also available.
Basic Operation
Based on our proven OPL, SPL and OPLH Series SWICHGAGE® models, the 45HE Series includes two magnetic-field-actuated PowerHall* transis- tors. When the magnetized indicating pointer
| meets one of the | Fingertip | | PowerHall* |
| Hall effect devices, | Adjustable | | Transistor |
| the corresponding | Trip Point | | |
| alarm or shutdown | | | |
| transistor output | 10 | 15 | 20 |
| signal becomes | 100 |
| 80 | 120 |
| active. The 45HE |
| 60 | | |
| | | |
trip points are fin- gertip adjustable.
Optional Features
Remote Transmitter Option (-P4)
This factory-sealed, remote pressure transmitter protects the 45PHE sensing element from line pres- sures of highly viscous and mildly corrosive fluids. A 5 foot (1.5 m) stainless steel capillary tube trans- mits pressure from the diaphragm seal to the unit. A 1 NPTM plated steel pulsation dampener is included to help prevent damaging pulsation.
Direct Transmitter Option (-P6)
The -P6 option is the direct mounted version of the -P4 (remote transmitter option). This factory- sealed mechanism consists of a 2 NPTM plated steel diaphragm housing (304 stainless steel diaphragm housing is optional), which attaches directly to the 45PHE pressure SWICHGAGE® .
Explosion-proof Option (-EX)
Most 45HE Series SWICHGAGE® devices are available with an explosion-proof case for haz- ardous applications.
Warranty
Atwo-year limited warranty on materials and workmanship is given with this Murphy product. Details are available on request and are packed with each unit.
*Allegro MicroSystems, Inc., registered trademark.
