Description
Explosion-proof differential pressure sensors ΔP for Zone 2 and 22
The RedCos-P7500 is the most powerful execution within the RedCos-P series and combines explosion-proof technology with high measurement accuracy for pressure measurements up to ±7,500 Pa. This sensor is specially developed for use in explosive environments and meets the strictest ATEX and IECEx standards for zones 2 (gas) and 22 (dust).
Thanks to the 24 VAC/DC supply and the selectable analog output (0–10 V or (0)4–20 mA), the RedCos-P7500 offers maximum flexibility and reliable performance in industrial processes, power plants and offshore installations.
The robust IP66 enclosure with integrated Ex-e terminal box and intuitive three-button operation ensures safe, fast and error-free installation. Optional offshore versions (CT/OCT) and stainless steel variants (VA/OVA) are available, designed for long-term use in aggressive or humid environments.
Main features
- ATEX and IECEx certified for Zone 2 (gas) and 22 (dust)
- Measuring range ±7,500 Pa, adjustable to a minimum of 20% of full range (1,500 Pa)
- Selectable output: 0–10 V or (0)4–20 mA
- 24 VAC/DC power supply (±20%), galvanically isolated input and output
- High accuracy: typically < ±1% of end value
- IP66 protection rating, dust and waterproof
- Illuminated display with 3 buttons and password protection
- Housing options: Aluminium, CT/OCT (offshore) or VA/OVA (stainless steel)
- Operating temperature: −20…+50 °C
- Low-maintenance design, ideal for continuous use
Technical data
| Type | RedCos-P7500 |
| Measuring principle | Differential pressure, internal piezoelectric sensor |
| Measuring range | ±7,500 Pa; minimum adjustable range 20% (1,500 Pa) |
| Power supply | 24 VAC/DC ±20% (19.2…28.8 V), 50/60 Hz |
| Output signal | 0–10 V or (0)4–20 mA, locally selectable; invertible |
| Protection rating | IP66 |
| Explosion protection | ATEX 2014/34/EU & IECEx, zones 2 (gas) and 22 (dust) |
| Accuracy | Typically < ±1% EV; Max. ±2% EV ± 1 Pa; T90 ≈ 5 s |
| Temperature range | −20…+50 °C (operation); −35…+70 °C (storage) |
| Housing | Aluminium (coated); options: CT/OCT (offshore), VA/OVA (stainless steel) |
| Pressure connections | P+/P− nipples Ø 4–6 mm; OCT/OVA: stainless steel tube connections Ø 6 mm |
| Cable connections | 2× M16 (standard); VA/OCT/OVA: 2× M20 Ex-e cable glands |
| Dimensions/weight | Alu: approx. 180×107×66 mm / ~950 g; stainless steel: approx. 195×127×70 mm / ~2.5 kg |
Frequently asked questions (FAQ)
What applications is the RedCos-P7500 intended for?
The sensor is developed for pressure measurements in HVAC, process and industrial installations in explosion-proof zones 2 (gas) and 22 (dust).
Can the output be configured locally?
Yes, the internal display menu allows easy selection between 0–10 V or (0)4–20 mA, including signal inversion.
Is the RedCos-P7500 suitable for use in offshore environments?
Certainly. The optional CT, OCT, VA and OVA versions with stainless steel components make the sensor extremely suitable for offshore and corrosive conditions.
What is the smallest adjustable measuring range?
The minimum adjustable range is 20% of the full range, so 1,500 Pa for this model.
Which accessories are available?
Various accessories are available, such as mounting brackets, pressure hoses, stainless steel connection sets, Ex cable glands and weather shields.
Do you have questions or would you like more information? contact us! You can do so via telephone, email or via the chat function.
Available versions RedCos-P | 100 Pa…7,500 Pa | Zone 2, 22
| Type | Max. range | Min. range | Max. pressure | Technical data | Certificate | EC declaration |
| RedCos-P100 | ± 100 Pa | 20 Pa | 25,000 Pa |  | | |
| RedCos-P250 | ± 250 Pa | 50 Pa | 25,000 Pa | | | |
| RedCos-P500 | ± 500 Pa | 100 Pa | 50,000 Pa | | | |
| RedCos-P1250 | ± 1250 Pa | 250 Pa | 50,000 Pa | | | |
| RedCos-P2500 | ± 2500 Pa | 500 Pa | 50,000 Pa | | | |
| RedCos-P5000 | ± 5000 Pa | 1000 Pa | 75,000 Pa | | | |
| RedCos-P7500 | ± 7500 Pa | 1500 Pa | 120,000 Pa | | | |
Delivery scope – RedCos-P ..
1 × Analog sensor RedCos-P with integrated Ex-e terminal box
3 × Self-tapping screw Ø 4.2 × 13 mm
1 × Short-circuit tube ~ 140 mm length
Special models – RedCos-P ..- A
Module with one intrinsically safe 4..20 mA output for connection to an external actual value indicator
Special model in stainless steel – RedCos-P -…- VA
Stainless steel housing similar to AISI 316, some parts nickel-plated
Special model in stainless steel – RedCos-P -…- OVA
Offshore version with Aluminium housing, pressure connection and screws
in seawater-resistant robust stainless steel (similar AISI 316), M20 cable glands nickel-plated
Special model painted (coated) – RedCos-P -…- CT
Aluminium housing offshore / marine coated, seawater-resistant, cable glands nickel-plated, screws in stainless steel
Special model painted (coated) – RedCos-P -…- OKT
Offshore version with Aluminium housing offshore / marine coated, seawater-resistant, cable glands nickel-plated, tubes for compression fitting
Ø 6 mm and screws in stainless steel
Accessories – RedCos-P
- Intrinsic, external LCD indicator connectable to RedCos-P ..- A sensors, mounting in hazardous locations Zone 2, 22
- Mounting bracket for round air ducts up to Ø 600 mm
- Mounting set with 2 m flexible pressure hose Ø 6 mm
- Stainless steel pressure tube connection for 6 mm compression fittings
- M16 standard cable glands in nickel-plated brass
- M20 Ex-d cable glands in nickel-plated brass for armored cables
- (Offshore applications)
Heating system ExPolar for use with RedCos sensors at low temperatures down to −40 °C
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