Description
Dwyer SERIES AT-1800 ATEX/IECEX APPROVED LOW DIFFERENTIAL PRESSURE SWITCH
The 1800 in Flameproof ATEX/IECEx Enclosure
Essential for industrial environments, the Series AT-1800 ATEX/IECEx Approved Low Differential Pressure Switch 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 AT-1800 flameproof enclosures are available in aluminum and are ideal for low pressure hazardous area applications. Various housing options such as an over-pressure relief valve or external set point adjustment knob are available. External set point knob allows adjustment without opening the enclosure.
Attention: Check local safety rules and warnings on unit and manual for a correct use of the instrument in hazardous area.
Important notes for installation:
• Cables must be fitted through 1/2″ NPT cable gland or ATEX/IECEx conduit (not supplied with instrument).
• Make sure after cabling to close tight cover and cable gland, in order to maintain IP66 rating.
• 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 areas.
Please see Series 1800 for non-ATEX/IECEx approved.
Features:
- Compact size and repeatability provides a high-value switch for many industrial applications
- External set point knob provides easy access that simplifies making adjustments without opening enclosure
- Flameproof enclosure protects the device in hazardous areas
- Increased response time at low pressures with LD port configuration
Applications:
- Hazardous area pressure switch
- Process applications
- Mechanical equipment control
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) (Note: Product temperature limits differ from case)
- Pressure Limits: See pressure limit chart on the catalog page
- Switch Type: SPDT
- Repeatability: ±2% FS
- Electrical Rating: 15 A @ 120-480 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 set point adjustment knob optional
- Enclosure Rating: IP66
- Housing Material: Aluminum
- Finishing: Texture epoxy coat RAL7015
- Process Connections: 1/8″ NPT female brass (SS optional)
- Electrical Connections: Two 1/2″ NPT female. Cable gland not included
- Weight: 10.5 lb (4.8 kg)
- ATEX Certificate:INERIS 21ATEX0033X.IECEx Certificate:IECEx INE 21.0064X.Compliant:ATEX: CE 0080 EX II 2G Ex db IIC T5, T6 Gb -60°C ≤Ta ≤+50°C (T6) -60°C ≤Ta ≤+60°C (T5) II 2D Ex tb IIIC T75 °C Db; IECEx: Ex db IIC T5, T6 Gb -60°C ≤Ta ≤+50°C (T6) -60°C ≤Ta ≤+60°C (T5) Ex tb IIIC T75°C Db.
Models:
SERIES AT-1800 SERIES PRESSURE SWITCH
AT-101NA-1823-X-XXXX AT-1800 PR SW W/ ATEX ENCLOSURE
1ST SYMBOL (1ST X) RANGE
00 0.08 - 0.22 IN WC
0 0.15 - 0.50 IN WC
1 0.3 - 1.0 IN WC
2 0.5 - 2.0 IN WC
5 1.5 - 5.0 IN WC
10 2.0 - 10.0 IN WC
20 3.0 - 22.0 IN WC
40 5.0 - 44.0 IN WC
80 9.0 - 85.0 IN WC
2ND SYMBOL (2ND X) COVER
B BLIND
3RD SYMBOL (3RD X) PRESSURE PORT/VALVE MATERIAL
1 BRASS
2 STAINLESS STEEL
4TH SYMBOL (4TH X) PRESSURE PORT/VENTING VALVE
VS0 STD PRESSURE PORT 1/8” FEMALE NPT/NO VENTING VALVE
VL0 LD PRESSURE PORT 1/8” FEMALE NPT/NO VENTING VALVE
VS1 STD PRESSURE PORT 1/8” FEMALE NPT/STD VENTING VALVE
VS2 STD PRESSURE PORT 1/8” FEMALE NPT/LD VENTING VALVE
VL1 LD PRESSURE PORT 1/8” FEMALE NPT/LD VENTING VALVE
4TH SYMBOL (4TH X) CABLE ENTRY
12 1/2" NPT ANSI/ASME B1.20.1
