Series AT3A3000 ATEX Approved Photohelic® Switch/Gages
Photohelic® Switch/Gages in Flame-Proof ATEX Enclosures
Flame-proof ATEX approved Series AT3A3000 Photohelic® Switch/Gages, function
as versatile, highly repeatable pressure switches combined with a precise pressure
gage employing the time-proven Magnehelic® gage design. The Photohelic® switch/
gage measures and controls positive, negative or differential pressures of air and
compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35
psig (2.4 bar) or 80 psig (5.5 bar). Two phototransistor actuated, DPDT relays are
included for low/high limit control. Easy to adjust set point indicators are controlled
by knobs located on the gage face (accessible opening case after de-energizing
instrument). Set points can be interlocked to provide variable dead band– ideal for
control of fans, dampers, etc. Gage reading is continuous and unaffected by switch
operation, even during loss of electrical power. Flame-proof ATEX enclosures are
available in aluminum with glass window which allows for viewing of set point needles
and process pressure.
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 A3000 for non-ATEX approved.
Product Applications
- Hazardous area pressure measurement and switching
- Air conditioning systems
- Clean rooms
- Fume exhaust systems
Models & Ordering
Specifications
- Service:
- Air and non-combustible, compatible gases.
- Wetted Materials:
- Consult factory.
- Accuracy:
- ±2% of FS at 70°F (21.1°C); ±3% on -0 and ±4% on -00 models.
- Pressure Limits:
- -20 in Hg to 25 psig (-0.677 to 1.72 bar). MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar).
- Temperature Limits:
- 20 to 120°F (-6.67 to 48.9°C) LT low temperature option to -20°F available; Case: -76 to 140°F (-60 to 60°C) (Note: Product temperature limits differ from case).
- Dial Size:
- 4" (101.6 mm).
- Mounting Orientation:
- Diaphragm in vertical position.
- Set Point Adjustment:
- Adjustable knobs on Photohelic® gage face behind enclosure cover. Follow instructions and safety warnings to open cover.
- SWITCH SPECIFICATIONS:
- Switch Type:
- Each setpoint has 2 Form C relays (DPDT).
- Repeatability:
- ±1% of FS.
- Electrical Rating:
- 10 A @ 120 VAC, 6 A @ 240 VAC, 60 Hz res. 10 A @ 28 VDC.
- Electrical Wiring:
- Screw terminals.
- Power Requirements:
- 120 VAC, 50/60 Hz; 240 VAC & 24 VAC power optional.
- Enclosure Rating:
- IP66. IP65 with option OPV, overpressure relief valve.
- 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:
- Three 1/2" FNPT. Cable gland not included.
- Weight:
- 28.4 lb (12.9 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
- 3-in-1 ATEX approved instrument allows the reduction of several instruments with one product, saving inventory, installation time and money
- Flame-proof ATEX enclosure with optional glass window and aluminum housing protects the device in hazardous areas while giving local visibility to process pressure and set point status
Videos
Model Chart
|
EXAMPLE |
AT3 |
A3001 |
120VAC |
X |
X |
X |
A |
B |
1 |
X |
T2 |
Series AT33001-120VAC-XXX-AB1XT2 Photohelic® Gage with ATEX Enclosure, 0-1" w.c., 120 VAC, 15 psig, aluminum housing, blind top cover, 1/8" npt female brass pressure port, standard overpressure plug, stainless steel tag |
|
SERIES |
AT3 |
|
|
|
|
|
|
|
|
|
|
Photohelic® Gage with ATEX Enclosure |
|
|
|
3000-00N 3000-00 3000-0 3001 3002 3003 3004 3005 3006 3008 3010 3015 3020 3025 3030 3040 3050 3060 3080 3100 3150 3300-0 3301 3302 3304 3310 3320 3330 3000-00AV 3000-0AV 3001AV 3002AV 3010AV 3201 3202 3203 3204 3205 3210 3215 3220 3230 3000-6MM 3000-10MM 3000-25MM 3000-50MM 3000-80MM 3000-100M 3300-20MM 3300-30MM 3000-15CM 3000-20CM 3000-25CM 3000-50CM 3000-80CM 3000-100CM 3000-150CM 3000-200CM 3000-250CM 3000-300CM 3300-4CM 3300-10CM 3300-20CM 3300-30CM 3000-60PA 3000-125PA 3000-250PA 3000-500PA 3000-750PA 3300-120PA 3300-250PA 3300-500PA 3000-1KPA 3000-1.5KPA 3000-2KPA 3000-3KPA 3000-4KPA 3000-5KPA 3000-8KPA 3000-10KPA 3000-15KPA 3000-20KPA 3000-25KPA 3000-30KPA 3300-1KPA 3300-3KPA 3000-20MBAR 3000-100MBAR 3000-500MBAR 36003S 36006S 36010S |
|
|
|
|
|
|
|
|
|
.05-0-.2" w.c. 0-0.25" w.c. 0-0.5" w.c. 0-1" w.c. 0-2" w.c. 0-3" w.c. 0-4" w.c. 0-5" w.c. 0-6" w.c. 0-8" w.c. 0-10" w.c. 0-15" w.c. 0-20" w.c. 0-25" w.c. 0-30" w.c. 0-40" w.c. 0-50" w.c. 0-60" w.c. 0-80" w.c. 0-100" w.c. 0-150"w.c. .25-0-.25" w.c. .5-0-.5" w.c. 1-0-1" w.c. 2-0-2" w.c. 5-0-5" w.c. 10-0-10" w.c. 15-0-15" w.c. 0-.25" w.c. & 300-2000 fpm av 0-.5" w.c. & 500-2800 fpm av 0-1" w.c. & 500-4000 fpm av 0-2" w.c. & 1000-5600 fpm av 0-10" w.c. & 2000-12500 fpm av 0-1 psid 0-2 psid 0-3 psid 0-4 psid 0-5 psid 0-10 psid 0-15 psid 0-20 psid 0-30 psid 0-6 mm w.c. 0-10 mm w.c. 0-25 mm w.c. 0-50 mm w.c. 0-80 mm w.c. 0-100 mm w.c. 10-0-10 mm w.c. 15-0-15 mm w.c. 0-15 cm w.c. 0-20 cm w.c. 0-25 cm w.c. 0-50 cm w.c. 0-80 cm w.c. 0-100 cm w.c. 0-150 cm w.c. 0-200 cm w.c. 0-250 cm w.c. 0-300 cm w.c. 2-0-2 cm w.c. 5-0-5 cm w.c. 10-0-10 cm w.c. 15-0-15 cm w.c. 0-60 Pa 0-125 Pa 0-250 Pa 0-500 Pa 0-750 Pa 60-0-60 Pa 125-0-125 Pa 250-0-250 Pa 0-1 kPa 0-1.5 kPa 0-2 kPa 0-3 kPa 0-4 kPa 0-5 kPa 0-8 kPa 0-10 kPa 0-15 kPa 0-20 kPa 0-25 kPa 0-30 kPa 0.5-0-0.5 kPa 1.5-0-1.5 kPa 0-20 mbar 0-100 mbar 0-500 mbar 0-30 psi single pressure bourdon tube 0-60 psi single pressure bourdon tube 0-100 psi single pressure bourdon tube |
|
|
|
|
|
|
|
|
|
|
|
|
120 VAC |
|
|
|
|
|
X |
|
|
|
|
|
|
|
Standard Construction |
|
|
CONSTRUCTION |
|
|
|
|
|
|
|
|
|
|
Standard |
|
|
TEMPERATURE RATING |
|
|
|
|
|
|
|
|
|
|
Standard |
|
|
HOUSING MATERIAL |
|
|
|
|
|
|
|
|
|
|
Aluminum |
|
| COVER |
B O |
Blind Top Cover Glass Top Cover |
||||||||||
| 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 port |
||||||||||
| TAG | T2 | Stainless Steel Tag |
Product Literature
Manuals
Catalog Pages
Product Data Sheet
Approvals
Drawings
Questions
- Question
- What restrictions, if any, are imposed for the Magnehelic® and Photohelic® gages in vacuum service?
- Answer
- In applications involving higher vacuums than 20" Hg, leakage due to gage housing porosity becomes the limiting factor.
Photo Downloads
You must be logged in to view this content.Click here to login to your account.