Series AT21823 ATEX Approved 1823 Differential Pressure Switch

The 1823 in Flame-Proof ATEX Enclosure

Essential for industrial environments, the ATEX approved SERIES AT21823 combines small size with 2% repeatability. Set point adjustment inside the switch allows for set point settings across 9 ranges from the low of .07 in w.c. to a maximum 85 in w.c. differential pressure. Series AT21823 flame-proof ATEX enclosures are available in aluminum and are ideal for low pressure hazardous area applications. Various housing options such as an overpressure relief valve or external setpoint adjustment knob are available. External setpoint knob allows adjustment without opening the enclosure.

Important notes for installation:
• Cables must be fitted through 1/2" NPT cable gland or ATEX conduit (not supplied with instrument).
• Make sure after cabling to close tight cover and cable gland, in order to keep IP66 rating (IP65 with option OPV, overpressure relief valve).
• Open cover only after de-energizing instrument.
Attention: Check local safety rules and warnings on unit and manual for a correct use of the instrument in hazardous area.

Please see Series 1800 for non-ATEX approved.

California Residents:  Click Here for Proposition 65 WARNING.

Product Applications

  • Hazardous area pressure switch
  • Process applications
  • Mechanical equipment control

Models & Ordering

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Specifications

Service:
Air and non-combustible, compatible gases.
Wetted Materials:
Consult factory.
Temperature Limits:
-30 to 180°F (-34 to 82.2°C); 1823-00, -20 to 180°F (-28.9 to 82.2°C); Case: -76 to 140°F ( -60 to 60°C) (Note: Product temperature limits differ from case).
Pressure Limits:
10 psig (68.95 kPa) continuous, 25 psig (172.4 kPa) surge.
Switch Type:
SPDT.
Repeatability:
±2% FS.
Electrical Rating:
15 A @ 120 to 480 VAC, 60 Hz. Resistive 1/8 HP @ 125 VAC, 1/4 HP @ 250 VAC, 60 Hz. De-rate to 10 A for operation at high cycle rates.
Mounting Orientation:
Diaphragm in vertical position.
Set Point Adjustment:
Screw type inside mounting spud internal to switch. External setpoint adjustment knob optional.
Enclosure Rating:
IP66. IP65 with option OPV, overpressure relief valve or external setpoint adjustment knob.
Housing Material:
Aluminum.
Finishing:
Texture epoxy coat RAL7038.
Pressure Connections:
1/8" NPT female brass (SS optional). In presence of acetylene it is necessary to use SS.
Electrical Connections:
Two 1/2" FNPT. Cable gland not included.
Weight:
11.9 lb (5.4 kg).
ATEX Approved Products from Comhas with ECN:
BVI 14ATEX0072.
Agency Approvals:
CE 1370 II2 GD Ex d IIC Gb T6; -60°C ≤ Ta ≤ +60°C Ex tb IIIC Db T 85°C.

Features

  • Compact size and repeatability, provides a high-value switch for many industrial applications
  • External setpoint knob provides easy access that simplifies making adjustments without opening enclosure
  • Flame-proof ATEX enclosure protects the device in hazardous areas

Videos

Model Chart

EXAMPLE

AT21823

00

A

B

K1

1

X

T2

SF

Series AT21823-00-ABK11XT2-SF Pressure Switch with ATEX Enclosure, range 0.08-0.22" w.c., aluminum housing, blind top cover, without adjustment hand knob, 1/8" npt female brass pressure connection, standard plug without overpressure relief valve and stainless steel tag, silicon free

SERIES

AT21823

 

 

 

 

 

 

 

 

Pressure switch with ATEX enclosure

RANGE

 

00
0
1
2
5
10
20
40
80

 

 

 

 

 

 

 

0.08-0.22" w.c.
0.15-0.50" w.c.
0.3-1.0" w.c.
0.5-2.0" w.c.
1.5-5.0" w.c.
2.0-10.0" w.c.
3.0-22.0" w.c.
5.0-44.0" w.c.
9.0-85.0" w.c.

HOUSING MATERIAL

 

 

A

 

 

 

 

 

 

Aluminum

COVER

 

 

 

B
O

 

 

 

 

 

Blind Top Cover
Glass Top Cover (not available)

ADJUSTMENT HAND KNOB

 

 

 

 

K1
K2

 

 

 

 

without Adjustment Hand Knob
with Adjustment Hand Knob

PRESSURE CONNECTION

 

 

 

 

 

1
2

 

 

 

1/8" npt female Brass Pressure Port
1/8" npt female Stainless Steel Port

OVERPRESSURE PLUG

 

 

 

 

 

 

X
OPV

 

 

Standard without Overpressure Relief Valve
Overpressure Relief Valve material same as ports

STAINLESS STEEL TAG

 

 

 

 

 

 

 

T2

 

Stainless Steel Tag

OPTION

 

 

 

 

 

 

 

 

B
BGAP
G
MIL
PRESET
SF

Buna-N Diaphragm
B Gap Microswitch
G Contacts
MIL Switch
Preset
Silicon Free

 

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