# Ultra high purity transducer

> For applications in hazardous areas, Ex nA ic

- Catalog code: wu_20_wu_25_wu_26
- Category: Pressure measurement › Pressure sensors
- Product page: https://avigan.com.ua/wika/en/products/wu_20_wu_25_wu_26
- Price: on request
- Supplier: AVIGAN (TOV VIKA Prylad), official WIKA partner in Ukraine

## Overview

Reliable The WU-2x series combines state-of-the-art digital transducer concepts with analogue-like output signals, in order to provide the safest and most ...

## Applications

- Gas panels for OEM tools
- Semiconductor, flat panel display and photovoltaic industry
- Special and bulk-gas supply

## Special features

- High-accuracy pressure measurement 0.15 % RSS
- Excellent long-term stability
- Signal noise cancellation and shielding
- Active temperature compensation
- ATEX and IECEx zone 2 approval Class I, div. 2, groups A, B, C and D

## Specifications

| Parameter | Value |
|---|---|
| product family | WU-2x |
| short description | Ultra high purity transducer for applications in hazardous areas, Ex nA ic, models WU-20, WU-25, WU-26 |
| subcategory | Transducer |
| certifications | CE; RoHS; Pressure Equipment Directive; EMC; EMC EN 61326 |
| explosion protection | Ex nA ic IIC T4/T5/T6 Gc; Ex ec ic IIC T4/T5/T6 Gc; [II 3G Ex nA ic IIC T4/T5/T6 Gc X]; [II 3G Ex ec ic IIC T4/T5/T6 Gc X]; [Ex nA ic IIC T4/T5/T6 Gc]; [Ex ec ic IIC T4/T5/T6 Gc]; Nonincendive apparatus for use in class I, division 2, groups A,B,C,D; Nonincendive for use in class I, zone 2, group IIC (classified); Class I, Div. 2, Groups A, B, C, D; Class I, Zone 2, Group IIC (FM); II3G Ex nA ic IIC T4/T5/T6 Gc X; II3G Ex ec ic IIC T4/T5/T6 Gc X; FM: Class I, Div. 2, Groups A, B, C, D; FM: Class I, Zone 2, Group IIC |
| ambient temp | -20 … 85 °C |
| ip rating | IP67 |
| weight kg | 0.1 |
| languages in datasheet | en |
| pressure ranges | 0 … 2 bar; 0 … 4 bar; 0 … 7 bar; 0 … 11 bar; 0 … 17 bar; 0 … 25 bar; 0 … 36 bar; 0 … 70 bar; 0 … 100 bar; 0 … 145 bar; 0 … 225 bar; 0 … 360 bar |
| accuracy class | 0.15 % RSS |
| accuracy standard | IEC 61298-2 |
| process connections | ¼" weld stub; ¼" pressure screw, rotatable; ¼" T-connector, weld stub; ¼" union nut, rotatable; ¼" pressure screw, fixed; MSM C 1 1/8"; 316L per SEMI F20; 316L VIM/VAR |
| case material | 304 SS |
| wetted parts material | 2.4711 / UNS R30003; 316L per SEMI F20; 316L VIM/VAR; 316L; 316L per SEMI F20316L VIM/VAR; 2.4711/UNS R30003 |
| process temp | -20 … 100 °C |
| output signal | 4-20mA; 0-5V; 0-10V; 4...20mA; 0...5V; 0...10V |
| power supply | 10...30 V DC |
| electrical connection | Bayonet connector (4-pin), Circular connector M12 x 1 (4-pin), Cable outlet, Sub-D connector (9-pin), Sub-D HD connector (15-pin) |

## Datasheet tables

### Accuracy specifications

| 1 | 2 |
|---|---|
| Non-linearity per BFSL per IEC 61298-2 |  |
| For measuring ranges > 2 bar | ≤ 0.1 %of span |
| For measuring ranges ≤ 2 bar | ≤ 0.15 %of span |
| Accuracy | → See 'Max. measuring deviation' |
| Max. measuring deviation |  |
| RSS (root sum squares) | ■ ≤ 0.15 %of span ■ ≤ 0.4 %of span with measuring ranges ≤ 2 bar |
| Per IEC 61298-2 | ■ ≤ 0.3 %of span ■ ≤ 0.6 %of span with measuring ranges ≤ 2 bar |
| Zero point setting |  |
| Current output | -3.5 ... +3.5 %of span (via potentiometer) |
| Voltage output | -2 ... +3.5 %of span (via potentiometer) |
| Non-repeatability per IEC 61298-2 | ≤ 0.12 %of span |
| Mean temperature coefficient at -20 ... +80 °C [-4 ... +176 °F] (actively compensated) |  |
| Zero point | ≤ 0.1 %of span/10 K |
| Span | ≤ 0.15 %of span/10 K |
| Long-term drift per IEC 61298-2 |  |
| Typical | ≤ 0.25 %of span, at reference conditions |
| Measuring ranges ≤ 2 bar | ≤ 0.4 %of span |
| Reference conditions | Per IEC 61298-1 |

| bar | psi |
|---|---|
| 0 ... 2 | 0 ... 30 |
| 0 ... 4 | 0 ... 60 |
| 0 ... 7 | 0 ... 100 |
| 0 ... 11 | 0 ... 160 |
| 0 ... 17 | 0 ... 250 |
| 0 ... 25 | 0 ... 350 |
| 0 ...36 | 0 ... 500 |
| 0 ... 70 | 0 ... 1,000 |
| 0 ... 100 | 0 ... 1,500 |
| 0 ... 145 | 0 ... 2,000 |
| 0 ... 225 | 0 ... 3,000 |
| 0 ... 360 | 0 ... 5,000 |

### Further details on: Measuring range

| Overpressure limit | ■ 2-fold ■ 4-fold for measuring range 0 ... 2 bar [0 ... 30 psi] |
|---|---|

| bar | psi |
|---|---|
| 0 ... 2 | 0 ... 30 |
| 0 ... 4 | 0 ... 60 |
| 0 ... 7 | 0 ... 100 |
| 0 ... 11 | 0 ... 160 |
| 0 ... 17 | 0 ... 250 |

### Output signal

| 1 | 2 | 3 |
|---|---|---|
| Signal type | ■ 4 ... 20 mA, 2-wire ■ DC 0 ... 5 V, 3-wire ■ DC 0 ... 10 V, 3-wire |  |
| Load in Ω |  |  |
| 4 ...20mA | ≤ (U+ - 10 V) / 0.02 A |  |
| DC 0 ...5V | > 5 kΩ |  |
| DC 0 ...10V | > 10 kΩ |  |
| Voltage supply |  |  |
| Supply voltage | Output signal DC 0 ...5V / 4 ...20mA | DC 10 ...30V |
| Output signal DC 0 ...10V | DC 14 ...30V |  |
| Power P max | 1W |  |
| Dynamic behaviour |  |  |
| Rise time (10 ... 90 %) | ≤ 300 ms |  |

### Electrical connection

| Connection type | IP code 1) | Wire cross-section | Cable diameter | Cable lengths |
|---|---|---|---|---|
| Bayonet connector (4-pin) | IP67 | - | - | - |
| Circular connector M12 x 1 (4-pin) | IP67 (NEMA 4) | - | - | - |
| Cable outlet | IP67 (NEMA 4) | 0.22 mm² (AWG 24) | 4.8mm | ■ 1.5 m[5 ft] ■ 3 m[10 ft] |
| Sub-D connector (9-pin) | IP54 | - | - | - |
| Sub-D HD connector (15-pin) | IP54 | - | - | - |

### Further details on: Electrical connection

| Connection type | → See above |
|---|---|
| Wire cross-section | → See above |
| Cable diameter | → See above |
| Cable length | → See above |
| Pin assignment | → See below |
| Ingress protection (IP code) per IEC 60529 | → See above |
| Short-circuit resistance | S+ vs. U- (short time) |
| Reverse polarity protection | U+ vs. U- |
| Insulation voltage | DC 500V |

### Bayonet connector (4-pin)

| 1 | 2 | 2-wire | 3-wire |
|---|---|---|---|
|  | U + | A | A |
|  | U - | D | D |
|  | S + | - | B |

### Sub-D HD connector (15-pin)

| 1 | 2 | 2-wire | 3-wire |
|---|---|---|---|
|  | U + | 7 | 7 |
|  | U - | 5/12 | 5/12 |
|  | S + | - | 2 |

### Material

| 1 | 2 |
|---|---|
| Material (wetted) |  |
| Process connection | ■ 316L per SEMI F20 ■ 316L VIM/VAR |
| Thin-film sensor | 2.4711 / UNS R30003 |
| Material (in contact with the environment) |  |
| Case | 304 SS |
| Surface treatment | Electropolished per SEMI F19 |
| Surface roughness Ra |  |
| Typical | ≤ 0.13 µm (RA 5) |
| Maximum | ≤ 0.18 µm (RA 7) |

### Circular connector M12 x 1 (4-pin)

| 1 | 2 | 2-wire | 3-wire |
|---|---|---|---|
|  | U + | 1 | 1 |
|  | U - | 3 | 3 |
|  | S + | - | 4 |

| Sub-D connector (9-pin) | 2-wire | 3-wire |
|---|---|---|
| U + | 4 | 4 |
| U - | 8/9 | 8/9 |
| S + | - | 1 |

### Operating conditions

| Permissible media | ■ Speciality gases ■ Vapours ■ Liquids |
|---|---|
| Helium leak test | < 1 x 10 -9 mbar l/sec (atm STD cc/sec) per SEMI F1 |
| Vibration resistance per IEC 60068-2-6 | 0.35 mm(10 ... 58 Hz) / 5 g (58.1 ... 2,000 Hz) |
| Shock resistance per IEC 60068-2-27 | 500 g (1.5 ms) |

### Further details on: Operating conditions

| Permissible temperature ranges | Non-Ex | T4 | T5 | T6 |
|---|---|---|---|---|
| Medium temperature limit | -20 ...+100 °C [-4 ...+212 °F] | -20 ...+85 °C [-4 ...+185 °F] | -20 ...+60 °C [-4 ...+140 °F] | -20 ...+40 °C [-4 ...+104 °F] |
| Ambient temperature limit | -20 ...+85 °C [-4 ...+185 °F] | -20 ...+85 °C [-4 ...+185 °F] | -20 ...+60 °C [-4 ...+140 °F] | -20 ...+40 °C [-4 ...+104 °F] |
| Storage temperature limit | -40 ...+100 °C [-40 ...+212 °F] | -20 ...+85 °C [-4 ...+185 °F] | -20 ...+85 °C [-4 ...+185 °F] | -20 ...+85 °C [-4 ...+185 °F] |

### Packaging and instrument labelling

| Packaging | Double bagging per SEMI E49.6 |
|---|---|
| Assembly and packaging location | Clean room class 5 per ISO 14644 |
| Instrument labelling | WIKA product label, glued |

| Logo | Description | Country |
|---|---|---|
|  | EU declaration of conformity | European Union |
|  | EMCdirective EN 61326 emission (group 1, class B) and immunity (industrial application) |  |
|  | Pressure equipment directive |  |
|  | RoHS directive ATEX directive (option) |  |
|  | IECEx (option) Hazardous areas - Ex n Zone 2 gas [Ex nA ic IIC T4/T5/T6 Gc] [Ex ec ic IIC T4/T5/T6 Gc] | International |
|  | FM (option) Hazardous areas - Nonincendive apparatus for use in class I, division 2, groups A,B,C,D - Nonincendive for use in class I, zone 2, group IIC (classified) locations | USA |

### Safety-related characteristic values

| MTTF | > 100 years |
|---|---|

## Documents

- [ds_pe8707_en_co_b65764](https://avigan.com.ua/wika/docs/wika/ds_pe8707_en_co.pdf) — PDF, 430 KB, en