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INSTRUMENT FEATURES COMPARISON OF SENTRA HE, LE & VE SERIES TEMPERATURE CONTROL UNITS

Sentra Temperature Control Units Sentra 'SK' Series temperature control units are designed to circulate fluid through the process application for heating and cooling. Three instruments are offered.
Empty
HE Instrument
LE Instrument
VE Instrument

OPERATORS

Soft Touch Operators
Up / Down Arrow (Digital Setpoint)
Display Select
Off / On Rocker Switch
Manual Vent
Auto Vent

HE Instrument

Yes
Yes
Yes
No
Yes
Yes

LE Instrument 

Mixed
Yes
No
Yes
Yes
Yes

VE Instrument 

Mixed
Yes
No
Yes
No
Yes

COOLING VALVE

AVT™ Modulating Valve Control
PVT™ Solenoid Valve Control

 

Yes
No

 

Yes
No

 

No
Yes

TEMPERATURE DISPLAY

Continual 'To Process' Display
Continual 'Setpoint' Display
Selectable 'From Process' Display
°F or °C Display

 

Yes
Yes
Yes
Yes

 

Yes
Yes
No
Yes

 

Yes
No
No
No

CONTROL OUTPUT DISPLAY

Heat 'ON'
Cool 'ON'
Dead Band
Pump 'ON'
Power 'ON'

 

Yes
Yes
Yes
Yes
Yes

 

Yes
Yes
No
Yes
Yes

 

Yes
Yes
No
Yes
Yes

FLOW DISPLAY

Digital Flow Meter
GPM or LPM Display
Flow Deviation Alarm

 

Yes
Yes
Yes

 

No
No
No

 

No
No
No

DIAGNOSTIC DISPLAY

3 Phase Fault
Pump Overload Trip
High Temperature Fault
Water Supply Pressure
Temperature Deviation
Cooling Valve Fault
Sensor Fault
Communications Activity
% Capacity Display

 

Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes

 

No
Group*
Group*
Group*
E-Code**
E-Code**
E-Code**
No
No

 

No
No
No
No
No
No
E-Code**
No
No

COMMUNICATIONS

SPI Protocol
CAMAC Protocol
Custom Protocol
2 Wire Interface
4 Wire Interface

 

Yes
Yes
Opt
Yes
Yes

 

Yes
No
Opt
Yes
No

 

No
No
No
No
No

ADVANCED FEATURES

Remoteable Display
5° or 10° Deviation Band
Adjustable Deviation Band
Remote Setpoint
2nd Setpoint
Remote Start / Stop
Heat Only
Printer Port
Custom Programmable

 

Opt
No
Yes
Opt
Opt
Opt
Opt
Opt
Yes

 

No
Yes
No
No
No
No
No
No
No

 

No
No
No
No
No
No
No
No
No

OTHER

4 Year Warranty
Number Of Sensors

 

Yes
2

 

Yes
1

 

Yes
1

Notes

* Safety light will illuminate.
** error cord displayed in LED window.

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