AT1-1900 – Explosion-proof atex/iecex Exd differential pressure switch for low ranges

Quick Overview

ATEX_WEB_COMHAS     logo_iecex       logo_comhas

• One of the most popular Dwyer® pressure switchseries 1900 it is now available from
Comhas as single instrument Atex/IECEx approuved
• 6 models for operating ranges from 0.07 inches W.C. (18 Pascal) to 20 inches W.C. (5000 Pascal)
• Repeatability ±3%

Description

Atex:
II 2G Ex d IIC T6 Gb
II 2D Ex tb IIIC T85°C Db, -60°C≤Tamb≤+60°C

IECEx:
Ex d IIC T6 Gb
Ex tb IIIC T85°C Db
Certificato: IECEx EPS 14.0082

Esecuzione:
IP66 (IP65 with option OPV)

AT1-1900 specifications

Service: air and compatible gases
Wetted parts: consult factory
Temperature limits:
Pressure switch 1900: -30 to 180°F (-34 to 82.2°C)
Case: -76 to 140°F (-60 to 60°C)*
Pressure limits: 45”W.C. (11.2 kPa) continuous; 10 psig (68.95 kPa) surge.
Switch: type SPDT.
Repeatability: ±3%.
Electrical rating: 15A @ 120-480 VAC.
60 Hz resistivo;
1/8 HP @ 125 VAC;
1/4 HP @ 250 VAC, 60 Hz.
Derate to 10A for operating at high cycle rates.
Electrical wiring: 3 screw type, common, normally open and normally closed.
Set point adjustement: screw type on pressure switch inside the Exd enclosure accessibile by hole with plug on housing. Setpoint regulation must be done with instrument de energised. Follow instructions and safety warning to open cover.
Installation: in vertical position.
Diaphragm: silicon rubber standard.
Housing material: aluminium (stainless steel optional).
Finishing: texture epoxy coated L7038 (only aluminium case).
Pressure connections: 1/8” NPT F brass (stainless steel optional).
In presence of acetylene it is necessary to use stainless steel.
Electrical connections: 2 x 1/2” NPT F standard (cable gland not included).
Dimensions: see drawing below
Weight: 3.4 Kg ab

* Operating ambient temperature is defined also according to the options and pressure instrument choosed.

CAUTION FOR USE ONLY WITH AIR OR COMPATIBLE GASES!
CONTACT FACTORY FOR USE WITH GASES, OTHER THAN AIR AND NITROGEN.

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