The Series 750 submersible hydrostatic level transducer is specifically designed to meet the rigorous environments encountered in a slurry or highly viscous application. It provides precision depth measurement under most hostile conditions.
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Series 750 Features
- Custom Level Ranges to 115 ft (35 m) H2O
- Analog Outputs of 4-20 mA or 0-5 VDC
- Accuracy of ±0.25% FS
- Welded 316 SS Construction
- Non-clogging 2.75" Sensing Area
- Integral Diaphragm Protector
- Optional Lifetime Lightning Protection
- Optional Temperature Measurement Output
- Custom Cable Lengths
Series 750 Applications
- Lift Station
- Pump Control
- Slurry
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All KPSI Transducers utilize a highly accurate pressure sensor assembly specifically designed for hostile fluids and gases. The assembly is integrated with supporting electronics in a durable waterproof housing constructed of 316 stainless steel. The attached 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 environments.
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 type approved by the American Bureau of Shipping (ABS) and are UL, CUL, and FM approved; and have a IP 68 and NEMA 6P housing protection rating. The Series 750 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 |
750 |
Units |
Comments |
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LEVEL RANGES
|
| Full Scale Level Ranges (1) |
10 thru 115
(3 thru 35)
|
ft H2O
(m H2O) |
vented gage reference |
| Proof Pressure |
1.5 |
x FS |
|
| Burst Pressure |
2.0 |
x FS |
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| STATIC PERFORMANCE |
| Static Accuracy (2) |
±0.25 |
% FSO |
BFSL method |
| Resolution |
Infinitesimal |
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ENVIRONMENTAL
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| Wetted Materials |
316 S; Delrin®; Teflon® PTFE, polyurethane or Viton® |
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Delrin®, Viton® and Teflon® are registered trademarks of DuPont. |
| Compensated Temp Range |
0 to 50 |
ºC |
|
| Thermal Error (3) |
±0.10
|
%FSO/ºC
|
worst case over compensated temperature range |
| Operating Temp Range |
-20 to 60
0 to 50
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ºC
ºC
|
when using polyurethane cable
when using ETFE cable (4)
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| Protection Rating |
IP 68, NEMA 6P
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ELECTRICAL
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| Excitation |
9 - 30 (5) |
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 (6) |
| Zero Offset |
±0.20
<0.25 |
mA
VDC |
for mA output
for VDC output |
| Output Impedance |
See Loop Resistance diagram page 7 of datasheet
20
|
ohm
|
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 |
3.5 (1588)
0.05 (79) |
lbs (g)
lbs/ft (g/m) |
transducer
cable |
Cable
Jacket Material
Pull Strength
Number of Conductors
Conductor Size |
Polyurethane (std)
ETFE (7) (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
(Available for 4-20 mA output only)
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| Temperature Range |
-20 to 60
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ºC
|
available for 4-20 mA output versions only |
| Temperature Output Signal |
4 - 20 |
mA |
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| Temperature Measurement Accuracy |
±4 |
ºC |
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LIGHTNING PROTECTION (OPTIONAL) (8)
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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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| Temperature Measurement Accuracy |
±4 |
ºC |
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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.
- -20ºC to 50ºC for level ranges <= 100 ft (70m) H2O 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. Contact Customer Service for VDC output availability.
- 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.