Spanish
Chinese
Series 1800 Low Differential Pressure Switch for General Industrial Service
Set Points from 0.07" to 85" w.c. Repetitive Accuracy within 2%
Essential for industrial environments, the Series 1800 Low Differential Pressure Switch for general industrial service combines small size and low price with 2% repeatability for all but the most demanding applications. Set point adjustment inside the mounting stud permits mounting the switch on one side of a wall or panel with adjustment easily accessible on the opposite side. UL and CSA listed, and FM approved.
CAUTION: FOR USE ONLY WITH AIR OR COMPATIBLE GASES.
Please see Series AT-1800 for ATEX approved.
Product Applications
- Process applications
- Mechanical equipment control
Models & Ordering
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).
- Pressure Limits:
- 10 psig (68.95 kPa) continuous, 25 psig (172.4 kPa) surge.
- Switch Type:
- Single-pole double-throw (SPDT).
- Repeatability:
- ±2%.
- 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.
- Electrical Connections:
- 3 screw type, common, normally open and normally closed.
- Process Connections:
- 1/8" female NPT.
- Mounting Orientation:
- Diaphragm in vertical position. Consult factory for other position orientations.
- Set Point Adjustment:
- Screw type inside mounting spud.
- Weight:
- 1 lb, 5 oz (595 g).
- Agency Approvals:
- CE, CSA, FM, UL. NOTE: Optional (-EXPL) Explosion-proof Enclosure does not possess any agency approvals.
Features
- Compact size and repeatability provide a high-value switch for many industrial applications
- Designed for panel and wall mounting to easily meet mounting requirements in most industrial settings
- Pressure ranges from 0.07 in w.c. to 85 in w.c. make this switch suitable for a wide range of applications
Options
- Weatherproof Housing - 16-ga. steel enclosure with gasketed cover (NEMA 4, IP66) for wet or oily conditions. Withstands 200 hour salt spray test. Wt. 5-1/2 lbs. (2.5 kg). Switch must be factory installed. Change 1823 base number to 1824 and add -WP suffix. Example: 1824-1-WP.
- Explosion-proof Housing - Cast iron base with aluminum cover. Rated Class I, Group D; Class II, Div. 1 & 2, Groups E,F,G; Class III and NEMA 7 C,D, NEMA 9 E,F,G. Wt. 7-1/2 lbs. (3.4 kg). Switch must be factory installed. Change base number to 1824 and add -EXPL suffix. Example: 1824-1-EXPL.
- MIL Environmental Construction - Unlisted Model 1820 can be furnished with a special sealed snap switch for protection against high humidity, fungus and/or military applications. Similar to Model 1823 except dead band is slightly greater and some lower set points may not be possible. To order, add suffix -MIL. Example: 1820-2-MIL.
Accessories
| Model Number | Description | Usually Ships* | Price | Order | |
|---|---|---|---|---|---|
 |
A-389 | Mounting bracket, 16 ga steel, zinc plated and Dichromate dipped for corrosion resistance. | Next Day | $10.50 | Order |
 |
A-489 | 4" 303 SS straight static pressure tip with flange, 1/4" hose barb. | Next Day | $9.20 | Order |
 |
A-491 | 6" straight SS static pressure tip with mounting flange, 1/4" hose barb. | Next Day | $9.20 | Order |
 |
A-493 | 8" straight SS static pressure tip with mounting flange, 1/4" hose barb. | Next Day | $9.60 | Order |
 |
A-302F-B | 303 SS Static pressure tip with mounting flange, for 3/16" rubber or plastic tubing. 6" insertion depth, includes mounting screws | Next Day | $16.50 | Order |
 |
A-302F-C | 303 SS Static pressure tip with mounting flange, for 3/16" rubber or plastic tubing. 8" insertion depth, includes mounting screws | 8-9 Weeks | $18.75 | Order |
 |
A-302F-A | 303 SS Static pressure tip with mounting flange, for 3/16" I.D. rubber or plastic tubing. 4" insertion depth, includes mounting screws | Next Day | $12.00 | Order |
Videos
Model Chart
| EXAMPLE | 1820 | 00 | AT | Series 1820-00-AT Low Differential Pressure Switch, range 0.07-0.22" w.c., with aluminum tag. |
| SERIES |
1820 1823 1824 |
Low Differential Pressure Switch Low Differential Pressure Switch with Conduit Low Differential Pressure Switch without Conduit |
||
| RANGE |
00 0 1 2 5 10 20 40 80 |
0.07-0.22" w.c. 0.15-0.5" 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. |
||
| OPTIONS |
AT B BGAP EXPL GOLD LC MIL MR PRESET SF ST WP |
Aluminum Tag Buna-N Elastomers B-Gap Micro Switch Cast Iron Explosion-proof Housing Gold Contact Switch Less Conduit MIL Switch Manual Reset Preset Silicone Free (includes Buna-N Elastomers) Stainless Steel Tag Weatherproof Housing |
Product Literature
Manuals
Catalog Pages
Product Data Sheet
Approvals
Drawings
Questions
- Question
- Will a Dwyer pressure switch be damaged if the pressure exceeding the maximum set-point is applied to the switch?
- Answer
- No. Not unless the maximum pressure rating of the switch is exceeded.
- Question
- Can the 1900 Series be mounted so that the diaphragm is horizontal?
- Answer
- The series 1900 must be mounted with the diaphragm in the vertical position or the switch will be damaged. Please call one of our Applications Engineers for other position orientations.
- Question
- Do you have a troubleshooting guide for the 1823-80?
- Answer
- See the Instruction manual which comes with the unit or can be found under the Support Library tab on the Series 1800 web page. We would also recommend contacting Dwyer’s technical support team at 219-879-8000.
Related Products
Photo Downloads
You must be logged in to view this content.Click here to login to your account.
Product Reviews
Only registered users can write reviews. Please Sign in or create an account