• Adjustable Set Point Range:
    • Increasing: 1.2 to 75 psid, 8.3 to 517.1 kPa, 0.083 to 5.2 bar
    • Decreasing: 0.4 to 71 psid, 2.8 to 489.5 kPa, 0.028 to 4.9 bar
  • Deadband: Approximately 0.8 to 4 psi, 5.51 to 27.6 kPa, 0.055 to 0.28 bar
  • System Pressure (Maximum): 400 psig, 2757.90 kPa, 28 bar
  • Proof Pressure:
    • Both Ports: 750 psig, 5171.07 kPa, 52 bar
    • High: 750 psig, 5171.07 kPa, 52 bar
    • Low: 400 psig, 2757.90 kPa, 28 bar
  • Wetted Materials:
    • Pressure Port: 1/4" FNPT 300 Stainless Steel
    • Diaphragm: Polyimide
    • O-Ring: Viton
  • Relay: SPDT or DPDT
  • UL, CSA
    • Explosion Proof - Class 1, Div/Zone 1, Groups A, B, C and D
  • CRN, CE Mark, Dual Seal
The above description encapsulates the entire product series. Specifications for individual configurations may vary depending on the selection chosen.
read more...

5 Models In Stock

646DZE1
646DZE1
$396.00
  • Base Model
  • psig
    • Increasing 1.2 to 18
    • Decreasing 0.4 to 17.2
  • kPa
    • Increasing 8.3 to 124.1
    • Decreasing 2.8 to 118.5
  • bar
    • Increasing 0.083 to 1.24
    • Decreasing 0.028 to 1.19
  • Base Model

    646DZE1
  • Process Connection

    1/4"-18 Female NPT 300 Stainless Steel
  • O-Ring

    Viton
  • Output

    SPDT
  • Electrical Contacts

    Silver
  • Agency Approvals

    UL, CSA, CE, Dual Seal
646DZE2
646DZE2
  • Base Model
  • psig
    • Increasing 6 to 75
    • Decreasing 2 to 71
  • kPa
    • Increasing 41.4 to 517.1
    • Decreasing 13.8 to 489.5
  • bar
    • Increasing 0.414 to 5.2
    • Decreasing 0.14 to 4.9
  • Base Model

    646DZE2
  • Process Connection

    1/4"-18 Female NPT 300 Stainless Steel
  • O-Ring

    Viton
  • Output

    SPDT
  • Electrical Contacts

    Silver
  • Agency Approvals

    UL, CSA, CE, Dual Seal
646DZEM1
646DZEM1
$451.00
  • DPDT Electrical (M)
  • psig
    • Increasing 1.2 to 18
    • Decreasing 0.4 to 17.2
  • kPa
    • Increasing 8.3 to 124.1
    • Decreasing 2.8 to 118.5
  • bar
    • Increasing 0.083 to 1.24
    • Decreasing 0.028 to 1.19
  • Base Model

    646DZE1
  • Process Connection

    1/4"-18 Female NPT 300 Stainless Steel
  • O-Ring

    Viton
  • Output

    DPDT
  • Electrical Contacts

    Silver
  • Agency Approvals

    UL, CSA, CE, Dual Seal
646DZEM2
646DZEM2
$451.00
  • DPDT Electrical (M)
  • psig
    • Increasing 6 to 75
    • Decreasing 2 to 71
  • kPa
    • Increasing 41.4 to 517.1
    • Decreasing 13.8 to 489.5
  • bar
    • Increasing 0.414 to 5.2
    • Decreasing 0.14 to 4.9
  • Base Model

    646DZE2
  • Process Connection

    1/4"-18 Female NPT 300 Stainless Steel
  • O-Ring

    Viton
  • Output

    DPDT
  • Electrical Contacts

    Silver
  • Agency Approvals

    UL, CSA, CE, Dual Seal
646DZEY2
646DZEY2
$437.00
  • ATEX (Y)
  • psig
    • Increasing 6 to 75
    • Decreasing 2 to 71
  • kPa
    • Increasing 41.4 to 517.1
    • Decreasing 13.8 to 489.5
  • bar
    • Increasing 0.414 to 5.2
    • Decreasing 0.14 to 4.9
  • Base Model

    646DZE2
  • Process Connection

    1/4"-18 Female NPT 300 Stainless Steel
  • O-Ring

    Viton
  • Output

    SPDT
  • Electrical Contacts

    Silver
  • Agency Approvals

    ATEX

Selected Configuration

Model #:

646DZE2

Price:
Request a Quote
Availability:
In Stock (25+)
Min. Qty:
5 Items

Configuration

reset configuration

Agency Approvals

Available agency approvals listed below, ATEX/GOST is a non standard option.
  • ATEX
  • CE
  • CRN - Alberta
  • CRN - British Columbia
  • CRN - Manitoba
  • CRN - N.W. Territories
  • CRN - Saskatchewan
  • CSA
  • cUL
  • Dual Seal
  • EMC Directive
  • LVD
  • PED
  • RoHS
  • RTN
  • UL

NACE & NIST

  • NACE MR0175:2003

Set Point - Increasing

Set Point Ranges below describe the adjustable increasing range of the entire series, for specific ranges by model click a desired unit of measurement below.
Operating & Ordering Data:
MODEL 646DZE 1/4" Stainless Steel Pressure Port & Polyimide Diaphragm
Maximum
System
Pressure

psi
Proof (Test)
Pressure

psi
Adjustable
Set Point Range
Deadband
Approximate
psi
Model Number &
 Wetted Parts
Both
Ports
 Simult.
High over Low
Low over High
Increasing
Pressure

psi
Decreasing
Pressure

psi
Model
646DZE*
Wetted
Parts
    High Low
400 750 750 400 1.2 - 18 0.4 - 17.2 0.8 DZE1 Stainless
Steel
Polyimide
Viton
400 750 750 400 1.4 - 18 0.5 - 17.1 0.9 DZEM1
400 750 750 400 6 - 75 2 - 71 4 DZE2
  
Operating & Ordering Data:
MODEL 646DZE 1/4" Stainless Steel Pressure Port & Polyimide Diaphragm
Maximum
System
Pressure
 
kPa
Proof (Test)
Pressure
 
kPa
Adjustable
Set Point Range
Deadband
Approximate
kPa
Model Number &
 Wetted Parts
Both
Ports
 Simult.
High over Low
Low over High
Increasing
Pressure
 
kPa
Decreasing
Pressure

kPa
Model
646DZE*
 
Wetted
Parts
    High Low
2800 5200 5200 2800 8.3 - 124 2.8 - 119 5.5 DZE1 Stainless
Steel
Polyimide
Viton
2800 5200 5200 2800 9.7 - 124 3.4 - 118 6.2 DZEM1
2800 5200 5200 2800 41.4 - 520 14 - 490 28 DZE2
  
MODEL 646DZE 1/4" Stainless Steel Pressure Port & Polyimide Diaphragm
Maximum
System
Pressure
 
bar
Proof (Test)
Pressure
 
bar
Adjustable
Set Point Range
Deadband
Approximate
bar
Model Number &
 Wetted Parts
Both
Ports
 Simult.
High over Low
Low over High
Increasing
Pressure
 
bar
Decreasing
Pressure

bar
Model
646DZE*
Wetted
Parts
    High Low
28 52 52 28 0.083 - 1.24 0.028 - 1.19 0.055 DZE1 Stainless
Steel
Polyimide
Viton
28 52 52 28 0.097 - 1.24 0.034 - 1.18 0.062 DZEM1
28 52 52 28 0.414 - 5.2 0.14 - 4.9 0.28 DZE2
  
  • bar: 0.083 to 5.2
  • kPa: 8.3 to 517.1
  • psid: 1.2 to 75

Set Point - Decreasing

Set Point Ranges below describe the adjustable decreasing range of the entire series, for specific ranges by model click a desired unit of measurement below. 
Operating & Ordering Data:
MODEL 646DZE 1/4" Stainless Steel Pressure Port & Polyimide Diaphragm
Maximum
System
Pressure

psi
Proof (Test)
Pressure

psi
Adjustable
Set Point Range
Deadband
Approximate
psi
Model Number &
 Wetted Parts
Both
Ports
 Simult.
High over Low
Low over High
Increasing
Pressure

psi
Decreasing
Pressure

psi
Model
646DZE*
Wetted
Parts
    High Low
400 750 750 400 1.2 - 18 0.4 - 17.2 0.8 DZE1 Stainless
Steel
Polyimide
Viton
400 750 750 400 1.4 - 18 0.5 - 17.1 0.9 DZEM1
400 750 750 400 6 - 75 2 - 71 4 DZE2
  
Operating & Ordering Data:
MODEL 646DZE 1/4" Stainless Steel Pressure Port & Polyimide Diaphragm
Maximum
System
Pressure
 
kPa
Proof (Test)
Pressure
 
kPa
Adjustable
Set Point Range
Deadband
Approximate
kPa
Model Number &
 Wetted Parts
Both
Ports
 Simult.
High over Low
Low over High
Increasing
Pressure
 
kPa
Decreasing
Pressure

kPa
Model
646DZE*
 
Wetted
Parts
    High Low
2800 5200 5200 2800 8.3 - 124 2.8 - 119 5.5 DZE1 Stainless
Steel
Polyimide
Viton
2800 5200 5200 2800 9.7 - 124 3.4 - 118 6.2 DZEM1
2800 5200 5200 2800 41.4 - 520 14 - 490 28 DZE2
  
MODEL 646DZE 1/4" Stainless Steel Pressure Port & Polyimide Diaphragm
Maximum
System
Pressure
 
bar
Proof (Test)
Pressure
 
bar
Adjustable
Set Point Range
Deadband
Approximate
bar
Model Number &
 Wetted Parts
Both
Ports
 Simult.
High over Low
Low over High
Increasing
Pressure
 
bar
Decreasing
Pressure

bar
Model
646DZE*
Wetted
Parts
    High Low
28 52 52 28 0.083 - 1.24 0.028 - 1.19 0.055 DZE1 Stainless
Steel
Polyimide
Viton
28 52 52 28 0.097 - 1.24 0.034 - 1.18 0.062 DZEM1
28 52 52 28 0.414 - 5.2 0.14 - 4.9 0.28 DZE2
  
  • bar: 0.028 to 4.9
  • kPa: 2.8 to 489.5
  • psid: 0.4 to 71

Adjustment Type

  • Field Adjustable

System Pressure

System Pressure below describes the range of the entire series, for specific values by model click a desired unit of measurement below.
Operating & Ordering Data:
MODEL 646DZE 1/4" Stainless Steel Pressure Port & Polyimide Diaphragm
Maximum
System
Pressure

psi
Proof (Test)
Pressure

psi
Adjustable
Set Point Range
Deadband
Approximate
psi
Model Number &
 Wetted Parts
Both
Ports
 Simult.
High over Low
Low over High
Increasing
Pressure

psi
Decreasing
Pressure

psi
Model
646DZE*
Wetted
Parts
    High Low
400 750 750 400 1.2 - 18 0.4 - 17.2 0.8 DZE1 Stainless
Steel
Polyimide
Viton
400 750 750 400 1.4 - 18 0.5 - 17.1 0.9 DZEM1
400 750 750 400 6 - 75 2 - 71 4 DZE2
  
Operating & Ordering Data:
MODEL 646DZE 1/4" Stainless Steel Pressure Port & Polyimide Diaphragm
Maximum
System
Pressure
 
kPa
Proof (Test)
Pressure
 
kPa
Adjustable
Set Point Range
Deadband
Approximate
kPa
Model Number &
 Wetted Parts
Both
Ports
 Simult.
High over Low
Low over High
Increasing
Pressure
 
kPa
Decreasing
Pressure

kPa
Model
646DZE*
 
Wetted
Parts
    High Low
2800 5200 5200 2800 8.3 - 124 2.8 - 119 5.5 DZE1 Stainless
Steel
Polyimide
Viton
2800 5200 5200 2800 9.7 - 124 3.4 - 118 6.2 DZEM1
2800 5200 5200 2800 41.4 - 520 14 - 490 28 DZE2
  
MODEL 646DZE 1/4" Stainless Steel Pressure Port & Polyimide Diaphragm
Maximum
System
Pressure
 
bar
Proof (Test)
Pressure
 
bar
Adjustable
Set Point Range
Deadband
Approximate
bar
Model Number &
 Wetted Parts
Both
Ports
 Simult.
High over Low
Low over High
Increasing
Pressure
 
bar
Decreasing
Pressure

bar
Model
646DZE*
Wetted
Parts
    High Low
28 52 52 28 0.083 - 1.24 0.028 - 1.19 0.055 DZE1 Stainless
Steel
Polyimide
Viton
28 52 52 28 0.097 - 1.24 0.034 - 1.18 0.062 DZEM1
28 52 52 28 0.414 - 5.2 0.14 - 4.9 0.28 DZE2
  
  • bar: 28
  • kPa: 2,758
  • psig: 400

Proof Pressure - Both Ports

Below describes the proof pressure - both ports range of the entire series.
  • bar: 51.7
  • kPa: 5,171
  • psig: 750

Proof Pressure - Low Over High

Below describes the proof pressure - low over high range of the entire series.
  • bar: 28
  • kPa: 2,758
  • psig: 400

Proof Pressure - High Over Low

Below describes the proof pressure - high over low range of the entire series.
  • bar: 51.7
  • kPa: 5,171
  • psig: 750

Operating Temperature

  • -40° to 86° C (-40° to 187° F)

Deadband, Approximate

Deadband below describes the approximate deadband range of the entire series, for specific values by model click a desired unit of measurement below.
Operating & Ordering Data:
MODEL 646DZE 1/4" Stainless Steel Pressure Port & Polyimide Diaphragm
Maximum
System
Pressure

psi
Proof (Test)
Pressure

psi
Adjustable
Set Point Range
Deadband
Approximate
psi
Model Number &
 Wetted Parts
Both
Ports
 Simult.
High over Low
Low over High
Increasing
Pressure

psi
Decreasing
Pressure

psi
Model
646DZE*
Wetted
Parts
    High Low
400 750 750 400 1.2 - 18 0.4 - 17.2 0.8 DZE1 Stainless
Steel
Polyimide
Viton
400 750 750 400 1.4 - 18 0.5 - 17.1 0.9 DZEM1
400 750 750 400 6 - 75 2 - 71 4 DZE2
  
Operating & Ordering Data:
MODEL 646DZE 1/4" Stainless Steel Pressure Port & Polyimide Diaphragm
Maximum
System
Pressure
 
kPa
Proof (Test)
Pressure
 
kPa
Adjustable
Set Point Range
Deadband
Approximate
kPa
Model Number &
 Wetted Parts
Both
Ports
 Simult.
High over Low
Low over High
Increasing
Pressure
 
kPa
Decreasing
Pressure

kPa
Model
646DZE*
 
Wetted
Parts
    High Low
2800 5200 5200 2800 8.3 - 124 2.8 - 119 5.5 DZE1 Stainless
Steel
Polyimide
Viton
2800 5200 5200 2800 9.7 - 124 3.4 - 118 6.2 DZEM1
2800 5200 5200 2800 41.4 - 520 14 - 490 28 DZE2
  
MODEL 646DZE 1/4" Stainless Steel Pressure Port & Polyimide Diaphragm
Maximum
System
Pressure
 
bar
Proof (Test)
Pressure
 
bar
Adjustable
Set Point Range
Deadband
Approximate
bar
Model Number &
 Wetted Parts
Both
Ports
 Simult.
High over Low
Low over High
Increasing
Pressure
 
bar
Decreasing
Pressure

bar
Model
646DZE*
Wetted
Parts
    High Low
28 52 52 28 0.083 - 1.24 0.028 - 1.19 0.055 DZE1 Stainless
Steel
Polyimide
Viton
28 52 52 28 0.097 - 1.24 0.034 - 1.18 0.062 DZEM1
28 52 52 28 0.414 - 5.2 0.14 - 4.9 0.28 DZE2
  
  • bar: 0.055 to 0.28
  • kPa: 5.51 to 27.58
  • psig: 0.8 to 4

Process Connection - Threaded

  • 1/4" Female NPT

Environmental Protection

  • Hazardous Area
  • NEMA 4, 7, 9, 13 / IP54, 66

Switch Type

  • DPDT
  • SPDT

Electrical Assembly

  • Hermetic Seal

Electrical Rating

Electrical Characteristics:
VOLTS AMPERES
SPDT DPDT "M" Dbl Brk"X"
Resistive Resistive Resistive
Silver Contacts
125 AC - 50/60 Hz 15 5 15
250 AC - 50/60 Hz 15 5 15
480 AC - 50/60 Hz 15 - 15
28 DC     - 5 -
125 DC     0.4 0.5 0.4
250 AC - 50/60 Hz 0.2 - 0.2
Gold Contacts
125 AC - 50/60 Hz  1 Max 1 Max -
30 DC     1 Max 1 Max -
SPDT (Single Pole Double Throw)
A SPDT switching element has one normally open, one normally closed and one common terminal. Three terminals mean that the switch can be wired with the circuit either normally open (N/O) or normally closed (N/C).

DPDT (Double Pole Double Throw)
A DPDT switching element has six electrical terminals. In simple terms, it is two SPDT switching elements operating simultaneously at the same settings. This type of switch can handle two independent circuits without using a relay.

Normally Closed Switching Element
A Normally Closed (NC) Switching Element is one in which the terminals are wired so that current can flow through the switching element until the plunger pin is actuated to open the circuit.
  • 1 A at 125 Vac, 50/60 Hz
  • 11 A at 125/250 Vac Resistive, 5 A at 28 Vdc, 0.5 A at 125 Vdc
  • 15 A at 125/250/480 Vac Resistive 0.5 A at 125 DC, 0.2 A at 250 DC

Electrical - Free Leads

Available selections listed below, free leads are standard.
  • 18" (45 cm) Free Leads
  • 18" (45 cm) Teflon Leadwire

Electrical Contacts

Available electrical contact materials listed below, silver is standard.
  • Gold
  • Silver

Electrical Connectors

  • 1/2" Male NPT

Electrical Certification

  • 1 Second
  • ATEX - Baseefa certified for potentially explosive atmospheres. Models 646**Y, II 2 GD Ex d IIC, Baseefa 07ATEX0108X. (Option Y)

Enclosure/Body Material

  • Aluminum

Process Connection Material

  • 316 Stainless Steel

O-Ring Material

Available O-ring materials listed below, viton is standard.
  • Ethylene Propylene
  • Viton

Diaphragm Material

  • Polyimide