The Series 705 is a submersible hydrostatic level transducer specifically designed to meet the adverse environments encountered in wastewater applications. This suitably-sized transducer features a wide sensing area comprised of a Teflon® coated elastomeric diaphragm for reliable operation in highly viscous or slurry environments.
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Series 705 Features
- ±0.25% FSO Static Accuracy
- Flush Teflon® coated Elastomeric Diaphragm
- Custom Level Ranges from 6-115 ft (2-35 m) H2O
- Analog Outputs of 4-20 mA or 0-5 VDC
- Welded 316 SS or Titanium Construction
- Optional Lifetime Lightning Protection
- Optional Temperature Measurement Output
- Custom Polyurethane or ETFE Cable Lengths
Series 705 Applications
- Lift Station
- Slurry
- Pump Control
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All KPSI Transducers utilize a highly accurate pressure sensor assembly. The assembly is integrated with supporting electronics in a durable waterproof housing constructed of 316 stainless steel or titanium. The attached polyurethane or Tefzel® electrical cable is custom manufactured to Pressure Systems’ specifications and includes Kevlar® members to prevent errors due to cable elongation, and a unique water block feature that self-seals in the event of accidental cuts to the cable. Each transducer is shipped with our latest SuperDry™ Vent Filter that prevents moisture from entering the vent tube for at least one year without maintenance, even in the most humid environment.
These units are designed for installation in a Class I, Division 1, Groups A, B, C, and D, Class II, Division 1, Groups E, F and G, Class III, Division 1 hazardous location when connected to appropriate apparatus such as those manufactured by R. G. Stahl, Inc., and others. KPSI transducers are IS approved by UL, CUL and FM; and have a IP 68 and NEMA 6P housing protection rating. The Series 705 is CE compliant to EN 61000-6-4:2001 and EN 61000-6-2:2001. All KPSI Transducer calibrations are traceable to the National Institute of Standards and Technology (NIST).
Dated 04/09
| Parameter |
705 |
Units |
Comments |
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LEVEL RANGES
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| Full Scale Level Ranges (1) |
6 thru 115
(2 thru 35)
|
ft H2O
(m H2O) |
vented gage reference |
| Proof Pressure |
1.5 |
x FS |
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| Burst Pressure |
2.0 |
x FS |
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STATIC PERFORMANCE
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| Static Accuracy (2) |
±0.25 |
% FSO |
BFSL method |
| Resolution |
Infinitesimal |
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ENVIRONMENTAL
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| Wetted Materials |
316 SS or Titanium, Teflon®, polyurethane or Viton® |
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Viton® and Teflon® are registered trademarks of DuPont. |
| Compensated Temp Range |
0 to 50 |
ºC |
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| Thermal Error (3, 4) |
±0.10
Prorated
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%FSO/ºC
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for level ranges > 23' (7m) H2O
for level ranges <= 23' (7m) H2O |
| Operating Temp Range |
-20 to 60
0 to 50
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ºC
ºC
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when using polyurethane cable
when using ETFE cable (5)
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| Protection Rating |
IP 68, NEMA 6P
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ELECTRICAL
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| Excitation |
9 - 30 (6) |
VDC |
for mA and VDC output |
| Input Current |
20
3.5 |
mA max |
for mA output
for VDC output |
| Output |
4 - 20
0 - 5 |
mA
VDC |
options available (7) |
| Zero Offset |
±0.20
<0.25 |
mA
VDC |
for mA output
for VDC output |
| Output Impedance |
See Loop Resistance diagram page 7 of datasheet
2 0
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ohm
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for mA output
for VDC output |
| Insulation Resistance |
100 |
mega ohm |
at 50 VDC |
| Circuit Protection |
Polarity, surge/shorted output |
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PHYSICAL
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| Approximate Weight |
0.5 (227)
0.05 (79) |
lbs (g)
lbs/ft (g/m) |
transducer
cable |
Cable
Jacket Material
Pull Strength
Number of Conductors
Conductor Size |
Polyurethane (std)
ETFE (8) (opt)
200 (90)
4
22
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lbs (kg)
AWG
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Tefzel®, Teflon® and Kevlar® are registered trademarks of DuPont. |
| Cable Seal |
Molded polyurethane
Viton® Gland
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for polyurethane cable
for ETFE cable |
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TEMPERATURE OUTPUT OPTION
(Not Intrinsic Safety Approved)
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| Temperature Range |
-20 to 60
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ºC
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available for 4-20 mA output versions only |
| Output Signal |
4 - 20 |
mA |
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| Temperature Measurement Accuracy |
±4 |
ºC |
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LIGHTNING PROTECTION (OPTIONAL) (9)
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| Life Expectancy |
> 1000 operations |
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| Peak Clamping Voltage |
36 volts |
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| Response Time |
< 10 nsecs |
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- Intermediate level ranges are available.
- Static accuracy includes the combined errors due to nonlinearity, hysteresis and nonrepeatability on a Best Fit Straight Line (BFSL) basis, at 25ºC per ISA S51.1.
- Thermal error is the maximum allowable deviation from the Best Fit Straight Line due to a change in temperature, per ISA S51.1.
- Worst case over compensated temperature range.
- -20ºC to50ºC for level ranges <= 100 ft (70m) H20 when using ETFE cable.
- Intrinsic safety limits excitation to 28V.
- Custom VDC output levels can be provided up to 2.5 VDC less than the excitation supply voltage.
- ETFE is a fluoropolymer (Teflon® derivative) material, Tefzel® or equivalent.
- The power supply needs to be limited to 150 mA to avoid lock up of the gas tube after a suppression event.
Specifications subject to change without notice.