DatasheetDynisco SPX4502 Pressure Transmitter
The Dynisco SPX4502 is a variable, smart 2-wire pressure transmitter with 4…20 mA output signal for low-pressure ranges. The model was developed specifically for applications where low process pressures must be measured reliably. With its large diaphragm and flange mounting, the SPX4502 is particularly suitable for production plants in the plastics and chemical industries.
The transmitter is optionally available with a HART™ interface and can be supplied as an intrinsically safe version for explosion-hazardous areas. The ATEX certification II 2 (1) G ATEX 100a with intrinsic safety EEx ia IIC T4/T6 enables use in corresponding field applications. At the same time, the 2-wire connection provides simple and cost-effective wiring, even in high-interference environments.
All SPX4502 models feature a flange measuring head with a standard length of 51.6 mm and a low-pressure diaphragm with a diameter of 23.6 mm. The device is available with various connections, including connector versions for field use or weatherproof cable outlets. The wetted parts are made as standard of DyMax™ coated 15-5 PH stainless steel; Hastelloy C-276 and Inconel 718 are available as options.
| Type | Smart 2-wire pressure transmitter for low-pressure ranges |
|---|---|
| Series | Dynisco SPX4502 |
| Model | SPX4502 |
| Application | Low-pressure measurement in plastics and chemical plants, optionally for explosion-hazardous areas |
| Output signal | 2-wire 4…20 mA with superimposed digital communication for models with HART™ protocol |
| Optional communication | HART™ interface |
| Pressure ranges | 0…1.75 bar, 0…3.5 bar and 0…7 bar |
| Accuracy | ±0.50 % F.S. according to BFSL |
| Repeatability | ±0.1 % F.S. |
| Maximum overload | 2 × pressure range |
| Burst pressure | 6 × pressure range |
| Material in contact with media | 15-5 PH stainless steel, material no. 1.4545, standard DyMax™ coated |
| Optional wetted materials | Hastelloy C-276, Inconel 718 |
| Max. diaphragm operating temperature | 315 °C |
| Diaphragm zero shift due to temperature change | 0.2 bar / 10 °C |
| Max. housing operating temperature | Standard and EEx ia IIC up to T1…T4: 85 °C; EEx ia IIC up to T6 versions: 50 °C |
| Compensated temperature range | -18…65 °C |
| Housing zero shift due to temperature change | 0.2 % F.S. / 10 °C |
| Sensitivity shift due to temperature change | 0.2 % F.S. / 10 °C |
| Measuring system | 4-arm strain gauge |
| Signal output in fault condition | Failure signal level according to NAMUR NE43: ≤3.6 mA or ≥21 mA |
| Range adjustment | Turn-down up to 3:1 for versions with option “B” HART™ protocol |
| Supply voltage without intrinsic safety | 16…36 VDC for SPX4502“N” models |
| Supply voltage with intrinsic safety | 16…26 VDC for SPX4502“S” models |
| ATEX approval SPX4502 “S” | II 2 (1) G ATEX 100a, EEx ia IIC T4/T6 |
| Zero adjustment range | -40 % to +10 % F.S.; -80 % to +20 % F.S. for pressure range 35 bar |
| Span adjustment range | ±2 % F.S. maximum |
| Zero and span adjustment | For all versions via “ZERO” and “SPAN” push buttons; for versions with option “B” HART™ protocol via HART™ commands or push buttons |
| Load resistance | 500 Ω at 26 VDC supply voltage; 1000 Ω at 36 VDC supply voltage |
| Flange / pressure connection | Flat flange mounting ring with large low-pressure diaphragm, diameter 23.6 mm, with integrated seal |
| Stem length | NE: 2.031″ / 51.6 mm |
| Stem-housing connection | SS: 6″ / 152 mm with rigid capillary stem |
| Replaceable thermocouple | ZZ: without thermocouple |
| Electrical connections | AA: 6-pin bayonet connector type PT02A-10-6P | CA: 1/2-14 NPT conduit fitting with 2-wire connection cable, length 42″ / 1065 mm |
| Interfaces | A: no interface | B: HART™ protocol |
| Certifications | S: ATEX / intrinsically safe EEx ia IIC T4/T6 | N: no certification, general purpose |
| Pressure units | B: bar | M: MPa | P: PSI |
| Key features | Low-pressure measurement, large diaphragm, HART™ option, ATEX option, autozero and autocall, high noise immunity, variable pressure range adjustment |
