Keller 33 X Ed / 35 X Ed digital flameproof pressure transmitters, Ex db IIC, 0.05% error band, RS485 + 4–20 mA
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Quick overview
- Type: Gas & flame detection
- Signal / Protocol: 4–20 mA, Modbus, RS-485, Voltage
- Hazardous area: Hazardous-area rated / option
- Genuine productsSourced from the manufacturer or authorised channels
- Delivery across BangladeshDhaka, Chattogram and all industrial zones
- After-sales supportInstallation guidance and warranty handling
- Reply within 24 hoursCall +880 1713 552466 or email hello@argonmark.com
Specifications
| General | |
|---|---|
| Part no. | BD-1545 |
| Category | Oil & Gas Instruments |
| Group | Instrumentation & Control |
| Brand | Keller |
| Model | 33 X Ed / 35 X Ed |
| Technical | |
| Type | Gas & flame detection |
| Signal / Protocol | 4–20 mA, Modbus, RS-485, Voltage |
| Hazardous area | Hazardous-area rated / option |
Datasheet
Technical features
| Microcontroller transmitter characterised over the full pressure and temperature range for maximum accuracy | |
| Pressure available digitally (RS485, up to 128 devices, 1,400 m) and as analog 4–20 mA or 0–10 V | |
| Analog output freely scalable; units, filters and zero set with free CCS30 / PROG30 software | |
| Flameproof housing for gas group II hazardous areas |
Applications
| High-accuracy pressure measurement in Zone 1 hazardous areas | |
| Digital pressure networks and data logging in oil and gas plants |
Key specifications
| Ranges | −1…1 bar to 0…300 bar; any range from 0.1 bar |
|---|---|
| Accuracy | Digital 0.02% FS typ.; error band 0.05% FS (10–40 °C), 0.1% FS (−10 to 80 °C) |
| Output | RS485 (Keller bus, Modbus RTU) + 4–20 mA or 0–10 V |
| Supply | 8–32 V DC (13–32 V for 0–10 V) |
| Wetted materials | 316L stainless steel, Viton |
| Approvals | ATEX II 2 G Ex db IIC T6…T4 |
Performance (33 X Ed / 35 X Ed)
| Accuracy at room temperature | Analog 0.03% FS typ.; digital 0.02% FS typ. |
|---|---|
| Error band 10–40 °C | Analog 0.1% FS; digital 0.05% FS |
| Error band −10 to 80 °C | Analog 0.15% FS; digital 0.1% FS |
| Interface | RS485 half-duplex, 9,600 / 115,200 baud; Keller bus and Modbus RTU |
| Output / supply | 4–20 mA: 8–32 V DC; 0–10 V: 13–32 V DC; digital only: 3.5–12 V DC |
Common data
| Ranges (FS) | Vented gauge −1…1 to 30 bar; absolute/sealed gauge 1…300 bar (25 Ed / 35 X Ed sealed gauge to 100 bar); any range 0.1–300 bar |
|---|---|
| Overpressure | 3 to 450 bar depending on range |
| Stability | 0.1% FS typ. (FS > 1 bar); 1 mbar typ. (FS ≤ 1 bar) |
| Storage / operating temperature | −30 to +100 °C |
| Pressure connections | G¼, G½, G¾, ½-14 NPT, ¼-18 NPT |
| Wetted materials | Stainless steel 1.4435 (316L), Viton; Hastelloy C-276, gold-plated options |
| Oil filling options | Silicone; fluorinated (O2-compatible), olive oil, low-temperature oil |
| Electrical connection | PUR cable 2 m (with reference tube for gauge) |
| Protection | IP50 (IP65/IP68 on request) |
| Endurance | > 10 million cycles |
| Weight | ≈ 200 g |
| Hazardous area | ATEX II 2 G Ex db IIC T6…T4 (LCIE 03 ATEX 6082 X); T4 −30 ≤ Ta ≤ +100 °C, T6 to +80 °C |
Notes
| Data from the manufacturer's published datasheet. Confirm model, range, materials and approvals with Argonmark before ordering. |
Photo: courtesy of Keller, used with permission (source) — background removed by Argonmark. All photo credits
Description
The Keller 33 X Ed and 35 X Ed are digital, microcontroller-based pressure transmitters in a flameproof housing (Ex db IIC T6…T4). Each unit is characterised over its full pressure and temperature range, giving a digital error band of 0.05% FS between 10 and 40 °C and 0.1% FS from −10 to 80 °C, for ranges from 0.1 bar up to 300 bar.
Pressure is available over RS485 (Keller bus or Modbus RTU, up to 128 devices) and at the same time as a 4–20 mA or 0–10 V signal that can be re-scaled with free software. Wetted parts are 316L stainless steel.
Argonmark Ltd supplies Keller instruments across Bangladesh — Dhaka, Chattogram, Gazipur, Narayanganj and the gas fields, refineries, terminals and power plants beyond. Send us the model, range, process connection, output and any hazardous-area requirement, and we will confirm the right configuration, lead time and price.
Questions & answers
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