NOSHOK 621 / 622 explosion-proof pressure transmitters, vacuum to 1,034 bar, 4–20 mA, FM/CSA Class I Div 1
Pricing depends on specification, quantity and delivery location. Send your requirement and we reply with a costed quotation within 24 hours.
Quick overview
- Type: Pressure transmitters
- Signal / Protocol: 4–20 mA, 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-1554 |
| Category | Oil & Gas Instruments |
| Group | Instrumentation & Control |
| Brand | NOSHOK |
| Model | 621 (threaded) / 622S, 622H (flush diaphragm) |
| Technical | |
| Type | Pressure transmitters |
| Signal / Protocol | 4–20 mA, Voltage |
| Hazardous area | Hazardous-area rated / option |
Datasheet
Technical features
| Diffused semiconductor / sputtered thin-film sensor for stability | |
| All-welded 316 stainless steel and Elgiloy wetted parts with no internal O-rings, gaskets or seals (621) | |
| 622 front-flush diaphragm (316 SS or Hastelloy C) for viscous or dirty media | |
| NACE MR0175 / ISO 15156 compliant; ANSI/ISA-12.27.01 single seal | |
| ½ in NPT conduit connection with integral cable or flying leads |
Applications
| Hydraulic and pneumatic systems, pumps and compressors | |
| Oil field, offshore and pipeline gas compressors | |
| Chemical/petrochemical, marine, power generation, water and wastewater |
Key specifications
| Range | Vacuum (−30 inHg) to 15,000 psi (−1 to 1,034 bar); absolute 0–15 and 0–100 psia (622 to 8,000 psi) |
|---|---|
| Accuracy | ±0.25% FS BFSL |
| Output | 4–20 mA 2-wire; 1–5 V or 0.5–4.5 V low power |
| Supply | 10–30 V DC (6–30 V low power) |
| Wetted materials | Welded 316 SS + Elgiloy, no internal seals (622: flush 316 SS or Hastelloy C) |
| Approvals | FM / CSA explosion-proof Class I Div 1 Groups A–D; dust ignition-proof Class II/III Div 1 E–G; single seal |
Specification
| Accuracy | ±0.25% FS BFSL incl. linearity, hysteresis, repeatability |
|---|---|
| Hysteresis / repeatability | ≤ ±0.1% FS / ≤ ±0.05% FS |
| Stability | ≤ ±0.2% FS per year, non-accumulating |
| Response time | ≤ 1 ms (10–90%) |
| Durability | > 100 million full-scale cycles |
| Ranges | Vacuum (−30 inHg) to 15,000 psi (−1 to 1,034 bar); absolute 0–15 and 0–100 psia |
| Proof / burst pressure | 3 × FS (to 200 psi); 1.75 × (300–10,000 psi); 1.5 × (15,000 psi) / 3.8 × FS (to 200 psi); 4 × (300–10,000 psi); 3 × (15,000 psi) |
| Outputs | 4–20 mA 2-wire; 1–5 V and 0.5–4.5 V 3-wire low power |
| Supply | 10–30 V DC (4–20 mA); 6–30 V DC (low power, ≤ 2 mA at ≤ 12 V) |
| Temperature | Compensated 0–80 °C (±0.02% FS/°C zero and span); ambient −30 to 100 °C; media −32 to 100 °C (−43 to 104 °C optional) |
| Wetted materials | 621: 316 SS (≤ 300 psi), 316 SS + Elgiloy (≥ 500 psi); 622: 316 SS or Hastelloy C flush, Buna-N (Viton) O-ring |
| Process connections | ¼ or ½ NPT male; 622: G½B or G1B flush |
| Housing / protection | 316 SS, NEMA 4X (IP67) |
| Shock / vibration | 1,000 g / 20 g (IEC 770) |
| Hazardous approvals | FM and CSA: explosion-proof Class I Div 1 Groups A–D; dust ignition-proof Class II/III Div 1 Groups E–G; max. 30 V, 20 mA |
| Weight | ≈ 340 g |
Notes
| Data from the manufacturer's published datasheet. Confirm model, range, materials and approvals with Argonmark before ordering. |
Photo: courtesy of NOSHOK, used with permission (source) — background removed by Argonmark. All photo credits
Description
The NOSHOK 621 and 622 are explosion-proof pressure transmitters approved by FM and CSA for Class I Division 1 hazardous locations. They use a diffused-semiconductor thin-film sensor for ±0.25% FS accuracy and ≤ 0.2% FS drift per year, across ranges from vacuum to 15,000 psi (622 flush-diaphragm versions to 8,000 psi).
The 621 has an all-welded 316 stainless steel and Elgiloy pressure chamber with no internal seals, and the 622 adds a front-flush 316 SS or Hastelloy diaphragm for viscous media. Outputs are 4–20 mA or low-power voltage, through a ½ in NPT conduit connection, and the transmitters are NACE MR0175 compliant.
Argonmark Ltd supplies NOSHOK 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
Customer questions
No questions asked yet. Ask about specification, compatibility, lead time or anything else about this item.
Reviews
No reviews yet. Bought or used this item? Be the first to share your experience.
-
Pressure transmitter, 4-20mA/HART, gauge/absolute
Price on request
-
Differential pressure (DP) transmitter
Price on request
-
Pressure gauge, bourdon, SS, 63/100/150mm dial
Price on request
-
Pressure switch, adjustable
Price on request
-
Temperature transmitter, RTD/TC input, HART
Price on request
-
RTD sensor Pt100, with thermowell
Price on request