WIKA · Pressure measurement · Family A2G
Differential pressure switch
Differential pressure switch with UL approval for monitoring air filters, fans, dampers, and industrial air cooling circuits, protecting heating coils from overheating.
Range
20…5000 Pa
Accuracy
±1% to ±5%
Protection
IP54
CERoHSREACHULCSAUL 508CSA C22.2 No.14
Price
On request
Depends on configuration
Description
The model A2G-42 differential pressure switch is used for monitoring the differential pressure, overpressure and vacuum of air and other non-flammable and non-aggressive gases. Possible application areas are the control of air flows and the monitoring of filter contamination in HVAC/R systems as well as the monitoring of industrial air circuits.
The setting of the switch point is made via an internal precision scale.
Differential pressure switch, model A2G-42
Special features
- UL and CSA approval
- Easy to install and assemble
- High accuracy
- Robust case and functional design: Reversible cable gland for flexible mounting (3 x 120°)
- Delivery incl. connection accessories
Configurator · Step by step
Build a A2G-42 for your task
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Step 1 of 3
Your configuration
- Kind of measurementDifferential pressure switch wit UL-approval
- UnitPa
- Scale range—
- Front panel designstandard air2guide
- Accessories—
- Certificates—
- Additional ordering informationWithout
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Identification
| Model | A2G-42 |
| Product family | A2G |
| Subcategory | Differential pressure switch |
Measuring range
| Pressure ranges | 20…200 Pa · 20…300 Pa · 30…400 Pa · 50…500 Pa · 100…1000 Pa · 200…1000 Pa · 500…2500 Pa · 1000…4000 Pa · 1000…5000 Pa |
Accuracy
| Accuracy class | ±1% to ±5%, min. ±5 Pa |
Process conditions
| Process connection | Plastic pipe connection, 6.0 mm external diameter2 plastic pipe connection pieces, Ø 6.0 mmplastic pipe connection pieces, external diameter 6.0 mm |
| Process temperature | −20…+60 °C |
Electrical characteristics
| Electrical connection | Tab terminals 6.3 x 0.8 mm, screw terminals, reversible cable gland M20x1.5 or NPT1/2 |
| Switching function | Adjustable switch point via internal precision scale |
| Switching contacts | 1 |
Materials
| Case material | Plastic |
| Wetted parts material | Silicone |
Operating environment
| Ambient temperature | −20…+60 °C |
| IP rating | IP54 |
| Weight | 0.15 kg |
Certifications and approvals
| Certifications | CERoHSREACHULCSAUL 508CSA C22.2 No.14 |
Additional details
| Datasheet languages | EN |
Tables from datasheet
Differential pressure switch, model A2G-42
| Operating pressure range | Pressure range | Switch differential 1) | Accuracy |
|---|---|---|---|
| 20 ... 200 Pa [0.08 ... 0.8 inWC] | 10 Pa [0.04 inWC] | ±5 %, min.±5 Pa [0.02 inWC] | |
| 20 ... 300 Pa [0.08 ... 1.2 inWC] | 10 Pa [0.04 inWC] | ±5 %, min.±5 Pa [0.02 inWC] | |
| 30 ... 400 Pa [0.12 ... 1.6 inWC] | 15 Pa [0.06 inWC] | ±5 %, min.±5 Pa [0.02 inWC] | |
| 50 ... 500 Pa [0.2 ... 2.0 inWC] | 20 Pa [0.08 inWC] | ±2.5 %, min.±5 Pa [0.02 inWC] | |
| 100 ... 1,000 Pa [0.4 ... 4.0 inWC] | 50 Pa [0.2 inWC] | ±2.5 %, min.±5 Pa [0.02 inWC] | |
| 200 ... 1,000 Pa [0.8 ... 4.0 inWC] | 100 Pa [0.4 inWC] | ±1 %, min.±5 Pa [0.02 inWC] | |
| 500 ... 2,500 Pa [2.0 ... 10.0 inWC] | 150 Pa [0.6 inWC] | ±1% | |
| 1,000 ... 4,000 Pa [4.0 ... 16.0 inWC] | 250 Pa [1.0 inWC] | ±1% | |
| 1,000 ... 5,000 Pa [4.0 ... 20.0 inWC] | 250 Pa [1.0 inWC] | ±1% | |
| Process connection | 2 plastic pipe connection pieces (P1 and P2), external diameter 6.0 mm[0.23 in]: P1 for connection to higher pressure (marked +) | ||
| Maximum operating pressure | 10 kPa for all pressure ranges | ||
| Electrical connection | ■ Up to max. 1.0 A (0.4) / AC 250 V, 50 ... 60 Hz with tab terminals 6.3 x 0.8 mm[0.24 x 0.03 in] and screw terminals separately enclosed ■ Gold-plated for low voltages with tab terminals 6.3 x 0.8 mm[0.24 x 0.03 in] and screw terminals separately enclosed | ||
| Switching power | |||
| Standard | Max. 1.0 A (0.4 A) / AC 250V / 50-60 Hz | ||
| Low-voltage | Max. 0.1 A / DC 24V | ||
| Switching cycles | 1,000,000 | ||
| Standard accessories | ■ 2 duct connectors ■ 2 mPVChose, Ø6mm[Ø0.24 in] ■ 4 self-tapping screws Ø3x10 mm[0.39 in] | ||
| Medium | Air, non-combustible and non-aggressive gases | ||
| Medium temperature range | -20 ...+60 °C [-4 ...+140 °F] | ||
| Ambient temperature range | -20 ...+60 °C [-4 ...+140 °F] | ||
| Storage temperature range | -40 ...+85 °C [-40 ...+185 °F] | ||
| Ingress protection | ■ IP54 with cable gland M20x1.5 ■ IP54 with cable conduit NPT1/2 ■ IP54 with cap nut conduit AF20 | ||
| Case | |||
| Diaphragm | Silicone, free of gas emissions Other materials on request. | ||
| Housing | Plastic | ||
| Fitting method | ■ Mounted directly ■ Bracket 4201/4202/4281/4282 | ||
| Adjuement knob | ■ Scale in Pascal and inWC ■ Scale in mbar ■ Scale in Pascal | ||
| Weight | 150 g [0.33 lb] |
| Logo | Description | Region |
|---|---|---|
| EU declaration of conformity | European Union | |
| UL 508 and CSA C22.2 No.14 Industrial control equipment | USA and Canada |
Industry
Heating / Utilities
Monitoring of air filters and fans, air dampers and industrial air cooling circuits · Protection of heating coils from overheating
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Ask an engineer →All variants · Article table
36 standard articles of family A2G
If you know the code — pick directly. If not — use the configurator in mode “01”.
Stock:
SKUConfigurationPriceStockAction
A2G-42-DADA-S-Z-ZZKind of measurement: 42 · Unit: DA · Scale range: DADA+ 4 moreOn requestOn orderRequest →
A2G-42-DADA-S-Z-1ZKind of measurement: 42 · Unit: DA · Scale range: DADA+ 4 moreOn requestOn orderRequest →
A2G-42-DADA-S-G-ZZKind of measurement: 42 · Unit: DA · Scale range: DADA+ 4 moreOn requestOn orderRequest →
A2G-42-DADA-S-G-1ZKind of measurement: 42 · Unit: DA · Scale range: DADA+ 4 moreOn requestOn orderRequest →
A2G-42-DAD1-S-Z-ZZKind of measurement: 42 · Unit: DA · Scale range: DAD1+ 4 moreOn requestOn orderRequest →
A2G-42-DAD1-S-Z-1ZKind of measurement: 42 · Unit: DA · Scale range: DAD1+ 4 moreOn requestOn orderRequest →
A2G-42-DAD1-S-G-ZZKind of measurement: 42 · Unit: DA · Scale range: DAD1+ 4 moreOn requestOn orderRequest →
A2G-42-DAD1-S-G-1ZKind of measurement: 42 · Unit: DA · Scale range: DAD1+ 4 moreOn requestOn orderRequest →
A2G-42-DAD2-S-Z-ZZKind of measurement: 42 · Unit: DA · Scale range: DAD2+ 4 moreOn requestOn orderRequest →
A2G-42-DAD2-S-Z-1ZKind of measurement: 42 · Unit: DA · Scale range: DAD2+ 4 moreOn requestOn orderRequest →
A2G-42-DAD2-S-G-ZZKind of measurement: 42 · Unit: DA · Scale range: DAD2+ 4 moreOn requestOn orderRequest →
A2G-42-DAD2-S-G-1ZKind of measurement: 42 · Unit: DA · Scale range: DAD2+ 4 moreOn requestOn orderRequest →
A2G-42-DAD3-S-Z-ZZKind of measurement: 42 · Unit: DA · Scale range: DAD3+ 4 moreOn requestOn orderRequest →
A2G-42-DAD3-S-Z-1ZKind of measurement: 42 · Unit: DA · Scale range: DAD3+ 4 moreOn requestOn orderRequest →
A2G-42-DAD3-S-G-ZZKind of measurement: 42 · Unit: DA · Scale range: DAD3+ 4 moreOn requestOn orderRequest →
A2G-42-DAD3-S-G-1ZKind of measurement: 42 · Unit: DA · Scale range: DAD3+ 4 moreOn requestOn orderRequest →
A2G-42-DAD4-S-Z-ZZKind of measurement: 42 · Unit: DA · Scale range: DAD4+ 4 moreOn requestOn orderRequest →
A2G-42-DAD4-S-Z-1ZKind of measurement: 42 · Unit: DA · Scale range: DAD4+ 4 moreOn requestOn orderRequest →
A2G-42-DAD4-S-G-ZZKind of measurement: 42 · Unit: DA · Scale range: DAD4+ 4 moreOn requestOn orderRequest →
A2G-42-DAD4-S-G-1ZKind of measurement: 42 · Unit: DA · Scale range: DAD4+ 4 moreOn requestOn orderRequest →
A2G-42-DAD5-S-Z-ZZKind of measurement: 42 · Unit: DA · Scale range: DAD5+ 4 moreOn requestOn orderRequest →
A2G-42-DAD5-S-Z-1ZKind of measurement: 42 · Unit: DA · Scale range: DAD5+ 4 moreOn requestOn orderRequest →
A2G-42-DAD5-S-G-ZZKind of measurement: 42 · Unit: DA · Scale range: DAD5+ 4 moreOn requestOn orderRequest →
A2G-42-DAD5-S-G-1ZKind of measurement: 42 · Unit: DA · Scale range: DAD5+ 4 moreOn requestOn orderRequest →
A2G-42-DAD6-S-Z-ZZKind of measurement: 42 · Unit: DA · Scale range: DAD6+ 4 moreOn requestOn orderRequest →
A2G-42-DAD6-S-Z-1ZKind of measurement: 42 · Unit: DA · Scale range: DAD6+ 4 moreOn requestOn orderRequest →
A2G-42-DAD6-S-G-ZZKind of measurement: 42 · Unit: DA · Scale range: DAD6+ 4 moreOn requestOn orderRequest →
A2G-42-DAD6-S-G-1ZKind of measurement: 42 · Unit: DA · Scale range: DAD6+ 4 moreOn requestOn orderRequest →
A2G-42-DAD7-S-Z-ZZKind of measurement: 42 · Unit: DA · Scale range: DAD7+ 4 moreOn requestOn orderRequest →
A2G-42-DAD7-S-Z-1ZKind of measurement: 42 · Unit: DA · Scale range: DAD7+ 4 moreOn requestOn orderRequest →
A2G-42-DAD7-S-G-ZZKind of measurement: 42 · Unit: DA · Scale range: DAD7+ 4 moreOn requestOn orderRequest →
A2G-42-DAD7-S-G-1ZKind of measurement: 42 · Unit: DA · Scale range: DAD7+ 4 moreOn requestOn orderRequest →
A2G-42-DAD8-S-Z-ZZKind of measurement: 42 · Unit: DA · Scale range: DAD8+ 4 moreOn requestOn orderRequest →
A2G-42-DAD8-S-Z-1ZKind of measurement: 42 · Unit: DA · Scale range: DAD8+ 4 moreOn requestOn orderRequest →
A2G-42-DAD8-S-G-ZZKind of measurement: 42 · Unit: DA · Scale range: DAD8+ 4 moreOn requestOn orderRequest →
A2G-42-DAD8-S-G-1ZKind of measurement: 42 · Unit: DA · Scale range: DAD8+ 4 moreOn requestOn orderRequest →
Showing 36 of 36. Price on request — an engineer will quote your configuration.