Image unavailable
Image unavailable
Keller
Keller 33X-Ed / 35X-Ed Flameproof Pressure Transmitter
Quote on request
No online payment · add lines to RFQ BOM
Keller 33X/35X-Ed: Ex db; ±0.05% FS; RS485/4–20 mA/0–10 V; to 300 bar. RFQ.
Download datasheet PDF
RFQ cart holds BOM lines only. Submit for engineering quote.
Key parameters
Measuring range
Absolute/gauge 0.1–300 bar class; standard FS −1…1 / 1 / 3 / 10 / 30 / 100 / 200 / 300 bar (series-dependent)
Output
4…20 mA (2-wire) or 0…10 V (3-wire) plus RS485 (KELLER Bus / MODBUS RTU)
Supply
8…32 VDC (2-wire); 13…32 VDC (3-wire); 3.2…32 VDC (digital)
Process connection
G 1/4", G 1/2", G 3/4", 1/2"-14 NPT, 1/4"-18 NPT
Electrical connection
PUR cable 2 m (PE sheath; reference tube for gauge)
Wetted parts
Stainless steel 1.4435 (316L), Viton®
Fits hazardous-area precision pressure where you need a Keller 33X-Ed or 35X-Ed—flameproof Ex db transmitters with ±0.05% FS digital accuracy, RS485 plus 4–20 mA or 0–10 V, covering about 0.1–300 bar (33X-Ed) or 0.1–100 bar front-flush (35X-Ed).
Key advantages
- Ex — Group II flameproof Ex db IIC T6…T4 class
- Accuracy — ±0.05% FS digital; TEB ±0.1% FS (−10…80 °C)
- Ranges — ~0.1–300 bar (33X-Ed); ~0.1–100 bar (35X-Ed)
- Outputs — RS485 Modbus/Keller Bus; 4–20 mA; 0–10 V
- Wetted — 316L / Viton class
Typical applications
- Ex-rated process pressure.
- Front-flush sticky media (35X-Ed).
- Precision hazloc indication.
Selection guide
- 33X vs 35X
- Range / connection
- Analog vs digital primary
Common mistakes
- Wrong Ex temperature class.
- Analog disturbance during RS485 talk.
- Gauge vs absolute mix-up.
When to RFQ / what to tell us
- Series, range, output, Ex docs.
- Quantity, ship-to.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 40895 |
| Brand | Keller |
| Model | 33X-Ed / 35X-Ed |
| Product type | Pressure Transmitter |
| Type | Flameproof piezoresistive pressure transmitter (33X-Ed / 35X-Ed) |
| Ranges | About 0.1–300 bar (33X-Ed); 0.1–100 bar (35X-Ed front-flush class) |
| Accuracy | ±0.05% FS digital @ RT; error band ±0.05% FS (10…40 °C); ±0.1% FS (−10…80 °C) |
| Outputs | RS485 (Keller Bus / Modbus RTU); 4–20 mA; 0–10 V |
| Ex | Group II flameproof Ex db IIC T6…T4 class |
Documents
FAQ
Q: Accuracy? A: ±0.05% FS digital at room temperature class.
Q: Ex? A: Flameproof Ex db Group II class.
Q: What should I send for a quote? A: Series/range/output, quantity, ship-to.
Links
| Parameter | Value |
|---|---|
| Measuring range | Absolute/gauge 0.1–300 bar class; standard FS −1…1 / 1 / 3 / 10 / 30 / 100 / 200 / 300 bar (series-dependent) |
| Output | 4…20 mA (2-wire) or 0…10 V (3-wire) plus RS485 (KELLER Bus / MODBUS RTU) |
| Supply | 8…32 VDC (2-wire); 13…32 VDC (3-wire); 3.2…32 VDC (digital) |
| Process connection | G 1/4", G 1/2", G 3/4", 1/2"-14 NPT, 1/4"-18 NPT |
| Electrical connection | PUR cable 2 m (PE sheath; reference tube for gauge) |
| Wetted parts | Stainless steel 1.4435 (316L), Viton® |
| Accuracy Digital | 33X-Ed/35X-Ed digital: typ. 0.02% FS @ RT; error band 0.05% FS (10…40 °C), 0.1% FS (−10…80 °C) |
| Accuracy Analog | 33X-Ed/35X-Ed analog: typ. 0.03% FS @ RT; error band 0.1% FS (10…40 °C) |
| Interface | RS485 half-duplex 9600 / 115200 baud; up to 128 bus subscribers |
| Ex Classification | II 2 G Ex db IIC T6 to T4 Gb; EPS 22 ATEX 1 007X; IECEx EPS 22.0002X; UKEX |
| Temperature Limits | Storage/operating −30…100 °C (33/35X-Ed); Ta limits per T-class to +100 °C (T4) |
| Long Term Stability | 0.1% FS typ. (FS > 1 bar); 1 mbar typ. (FS ≤ 1 bar) |
| Housing | Pressure-proof / flameproof enclosure for Group II hazardous areas |
| Family | Series 33X-Ed (G1/4 body) / 35X-Ed (flush/G1/2 style) digital X-line transmitters |