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Series 626 & 628 Industrial Pressure Transmitter
Complete Offering of Ranges, Connections and Outputs
The Series 626 Pressure Transmitters possess a highly precise 0.25% full scale accuracy piezo-resistive sensor contained in a compact, rugged, NEMA 4X (IP66) stainless steel general purpose housing or cast aluminum conduit housing.
The Series 628 Pressure Transmitters are ideal for OEMs with 1% full scale accuracy sensors. The corrosion resistant 316L stainless steel wetted parts allow the Series 626 and 628 transmitters to measure the pressure in a multitude of processes from hydraulic oils to chemicals. The Series 626 and 628 are available in absolute and gage pressure ranges with a variety of optional outputs, process connections and electrical terminations to allow you to select the right transmitter for your application.
NIST CALIBRATION available in Product Configurator.
Note: The standard conduit housing (-CH) has been phased out, see the conduit box housing (-CB) for the replacement model.
Product Applications
- Compressors
- Pumping Systems
- Irrigation System Pressure
- Industrial Process Monitoring
- Hydraulic
Models & Ordering
Specifications
- Service:
- Compatible gases and liquids.
- Wetted Materials:
- Type 316L SS.
- Accuracy:
- 626: 0.25% FS; 626: 0.20% RSS; 628: 1.0% FS; 628: 0.5% RSS; 626 Absolute Ranges: 0.5% FS; 626 absolute ranges: 0.30% RSS. (Includes linearity, hysteresis, and repeatability.)
- Temperature Limit:
- 0 to 200°F (-18 to 93°C).
- Compensated Temperature Range:
- 0 to 175°F (-18 to 79°C).
- Thermal Effect:
- ±0.02% FS/°F. (includes zero and span).
- Pressure Limits:
- See table on catalog page.
- Power Requirements:
- 10 to 30 VDC (for 4 to 20 mA, 0 to 5, 1 to 5, 1 to 6 VDC outputs); 13 to 30 VDC (for 0 to 10, 2 to 10 VDC outputs); 5 VDC ±0.5 VDC (for 0.5 to 4.5 VDC ratio-metric output), 10 to 35 VDC (for 4 to 20 mA with -CB option); 13 to 35 VDC or isolated 16 to 33 VAC (for selectable output with -CB option).
- Output Signal:
- 4 to 20 mA, 0 to 5 VDC,1 to 5 VDC, 0 to 10 VDC, or 0.5 to 4.5 VDC, or selectable 0 to 5, 1 to 5, 0 to 10, 2 to 10 VDC for -CB option.
- Response Time:
- 300 ms.
- Loop Resistance:
- 0-1000 Ω max. R max = 50 (Vps-10) Ω (4-20 mA output), 5 KΩ min (0-5, 1-5, 0.5-4.5 VDC output), 15 KΩ min (1-6, 0-10, 2-10 VDC output).
- Current Consumption:
- 38 mA maximum (for 4 to 20 mA output); 10 mA maximum (for 0 to 5, 1 to 5, 1 to 6, 0 to 10, 2 to 10, 0.5 to 4.5 VDC output); 140 mA maximum (for all 626/628/629-CB with optional LED).
- Electrical Connections:
- Model dependent options: Wire end, Hirschman DIN EN 175801-803-C, Packard, Deutsch, M12.
- Process Connection:
- Model dependent options: 1/8", 1/4", 1/2" male NPT; 1/4" female NPT; 1/4" male or female BSPT; 1/8" or 1/4" male BSPP ISO 1179; 1/4" female SAE valve depressor.
- Enclosure Rating:
- NEMA 4X (IP66).
- Mounting Orientation:
- Mount in any position.
- Weight:
- 10 oz (283 g).
- Compliance:
- CE, Optional: NSF/ANSI 61/372, ANSI/UL 218, ANSI/UL 508, NEPA 20.
Features
- Robust 316L SS oil filled sensor provides shock and vibration resistance insuring stability in controlling pressure for process applications
- NEMA 4X rated enclosure provides protection in harsh environments permitting outdoor monitoring or in areas where dust and particulate matter exists
- A wide range of models and connections that can meet pressure measurement specifications from low to very high
Accessories
| Model Number | Description | Usually Ships* | Price | Order | |
|---|---|---|---|---|---|
 |
A-251 | Pressure snubber, brass, 1/4" male/female BSPP. | 14-15 Weeks | $24.75 | Order |
 |
A-257 | Pressure snubber, 316 SS, 1/4" male/female BSPP. | 12-13 Weeks | $53.00 | Order |
| A-960 | 3' packard cable. | Call for Details | $23.75 | Order | |
| A-164 | 16.4' (5 m) cable with M-12 4-pin female connector. | Less Than 1 Week | $45.25 | Order | |
| A-961 | 9' packard cable. | 17-18 Weeks | $27.25 | Order | |
| A-962 | 20' packard cable. | 17-18 Weeks | $28.75 | Order | |
| A-62X-LCD | Field upgradeable LCD display. | 1-2 Weeks | $169.00 | Order |
Videos
Model Chart
| EXAMPLE | 626 | 10 | GH | P1 | E1 | S1 | AT | Series 626-10-GH-P1-E1-S1-AT Industrial Pressure Transmitter, 0.25% full scale accuracy, range 0-100 psig, general housing, 1/4" male NPT, cable gland with 3' of prewired cable, 4-20 mA output, with aluminum tag. |
| SERIES | 626 628 |
0.25% Full Scale Accuracy 1.0% Full Scale Accuracy |
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| RANGE | 30 00 01 02 03 04 05 31 32 06 28 07 27 08 09 10 11 12 24 13 25 14 22 29 15 16 17 18 61 40 41 62 63 64 65 66 89 67 68 69 42 70 71 72 92 73 91 74 75 76 90 77 78 93 79 80 81 82 83 84 97 85 98 86 99 87 88 95 |
15-0 psia (1,4) 0-15 psia (1,4) 0-30 psia (1,4) 0-50 psia (1,5) 0-100 psia (1,5) 0-200 psia (1,5) 0-300 psia (1,5) 0-500 psia (1,4) 3-15 psig 0-5 psig 0-10 psig 0-15 psig 0-25 psig 0-30 psig 0-50 psig 0-100 psig 0-150 psig 0-200 psig 0-250 psig 0-300 psig 0-400 psig 0-500 psig 0-600 psig 0-750 psig 0-1000 psig 0-1500 psig 0-2000 psig 0-3000 psig 1-0 bar absolute (1,4) 0-1.6 bar absolute 0-2 bar absolute 0-2.5 bar absolute (1,4) 0-4 bar absolute (1,5) 0-6 bar absolute (1,5) 0-8 bar absolute (1,5) 0-10 bar absolute (1,5) 0-16 bar absolute (1,5) 0-0.5 bar 0-1 bar 0-1.5 bar 0-1.6 bar 0-2 bar 0-2.5 bar 0-3 bar 0-4 bar 0-5 bar 0-6 bar 0-7 bar 0-10 bar 0-15 bar 0-16 bar 0-17 bar 0-20 bar 0-25 bar 0-30 bar 0-35 bar 0-40 bar 0-70 bar 0-100 bar 0-150 bar 0-160 bar 0-200 bar 0-250 bar 0-350 bar 0-400 bar 0-500 bar 0-550 bar 0-600 bar |
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| HOUSING | CB GH |
Conduit Box Housing General Purpose Housing, NEMA 4X, IP66 |
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| PROCESS CONNECTION |
P1 P2 P3 P4 P5 P7 P8 P9 P10 |
1/4" Male NPT 1/4" Female NPT 1/4" Male BSPT 1/4" Female BSPT 1/4" Female SAE with Refrigerant Valve Depressor (1) 1/4" Male BSPP ISO 1179 1/8” Male NPT (1) 1/2" Male NPT (1) 1/8" Male BSPP |
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| ELECTRICAL CONNECTION |
E1 E2 E3 E4 E5 E6 E7 E8 E9 |
3' Cable 6' Cable 9' Cable Hirschmann DIN Plug (1) 1/2" Female NPT Conduit Connection(2) M-12 4-Pin Connector Hirschmann DIN Plug w/6' cable Packard Connector (1) M-12 4 Pin Connector NOT-UL |
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| SIGNAL OUTPUT | S1 S2 S3 S4 S5 S6 S7 S8 |
4-20 mA 2 Wire 1-5 Volts 2-10 Volts 0-5 Volts 0-10 Volts 1-6 Volts 0.5-4.5 Volts Ratiometric Selectable 0 to 5, 1 to 5, 0 to 10, 2 to 10 VDC (2) |
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| OPTIONS | AT LCD NIST NW SPCL |
Aluminum Tag LCD Indication NIST Traceable Certificate NSF Certification Special Cleaning for Oxygen Use |
(2) Available with -CB Housing only
(3) LED option is not NEMA 4X.
(4) 628 only and 2.0%
(5) 626 and 0.5% or 628 and 2.0%
BAR ranges not available with -CB option currently, future release.
Product Literature
Manuals
- Instruction Manual
- Instruction Manual, GH option
- Instruction Manual, CB option
- Instruction Manual, CB-S9 option
Catalog Pages
Product Data Sheet
SlideShare
Approvals
Drawings
Questions
- Question
- What does UFL displayed on the Dwyer Series 626/628 mean? The input Voltage is correct and it appears to be piped correctly, but my display says UFL and my output to my controller's input is -0.285vdc.
- Answer
- UFL indicates underflow.
- Question
- I have a 626 pressure transmitter I want to use in 4-20 mA output mode. Trying to figure out what resistance I need. Two questions: 1) What are the units for the result of Rl-max = (Vps - 10)/20 mA DC? For a 12v PS I get 0.1. Is that ohms, Kohms or what? and 2) Does it matter which let of the receiver (+ or -) input the resistance is placed?
- Answer
- If you use the equation RL-max=(Vps-10)/20mA DC without converting the 20mA to Amps then the results units will be in Kohms. The .1 that you calculated is in Kohms, so you will be to convert that to 100 ohms.
- Question
- Series 672 Low Pressure Transducer, is this pressure transmitter suitable for use with Natural Gas? The specs just mention 'suitable liquids and gases", but I don't see a list of what is suitable.
- Answer
- No, the 672 series low pressure transducer is not suitable for natural gas. It is not explosion proof nor compatible with combustible gases or liquids. As an alternative, depending on the range you need, I would recommend the 636, 3100, 3200G, or IS626 series pressure transmitters.
- Question
- I am using a differential pressure transmitter model 629-02-CH-P2-E5-S1-LED to measure differential pressure of water. How do I convert the 4-20 mA signal to the differential pressure reading?
- Answer
- The 4-20 mA output from the 629 is linear over the range, which in this case is 0-10 PSID. Therefore, a 4 mA output will coincide with a differential pressure of 0 PSID, and a 20 mA output will coincide with a differential pressure of 10 PSID with a linear relationship between those two points. With that information, you should simply be able to scale your receiver accordingly.
- Question
- What is the maximum media temperature for the Series 626 transmitters. I'm considering one for a steam application at about 360F
- Answer
- The maximum media temperature for the Series 626 transmitter is 200°F. Unfortunately, this unit is not made to be used in applications with that high of temperatures.
- Question
- Is the pressure sensor #628-10-GH-P1-E1-S1, chemical resistant? Is it resistant to Diesel Fuel? Is it resistant to Saline Conditions? Please advise. Thanks, Jorge M.
- Answer
- All wetted materials in the Series 626/628 is 316L Stainless Steel. You can use the Series 626/628 in any application that is compatible with 316L Stainless Steel.
- Question
- I need to power 5 transmitters with a battery (24V) and have 4-20mA signals going to a DAQ. Is there a transmitter that can do this and how many wires does it have? Would a 24V battery pack be a good power source for these sensors? My setup is portable and won't have access to a wall outlet.
- Answer
- There are a couple of ways to do it. 4-20mA transmitters are very simple but are not the most reliable for portable/battery powered use as they're not the most energy efficient. Ratiometric outputs are a way to make a transmitter more reliable and consume much less power. This type of output is a 3 wire scheme with a linear DC voltage output from 0.5VDC to 4.5VDC. Our 626/628 series are offered with this type of output and a variety of pressure ranges.
- Question
- I need to protect a pressure transmitter from power surges and spikes. The model of the transmitter is: 626-09-GH-P1-E1-S1
- Answer
- If you are worried about power surges and spikes, we recommend that you use a regulated power supply in your system. See our Model BPS-005 low cost DC regulated power supply.
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