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Water Level Sensors

We are a leading supplier of of water level and water quality sensors. Our expertise in media isolated pressure sensors offers unique advantages in creative product development and consistent product performance. Water level transducers can be customized and are available in a wide range of accuracies, materials, and cabling. With your choice of analog or digital output, our sensors are easily adapted to any data system. Or, use self-powered units with onboard memory for long term deployment. We also provide water quality instrumentation for analyzing lakes, rivers, estuaries, and aquifers worldwide. Our CTD models measure conductivity, temperature, and depth critical to water resources improvement and preservation.

Water Level Data Loggers 

 

TruBlue Logger 555 Level, 575 Baro, 585 CTD

TruBlue Logger 255 Level

TruBlue Logger 275 Baro

Accuracy

 ±0.05% FS TEB (TruBlue 555, 575, 585) 1% of reading or 20 μs/cm (TruBlue 585)

 0.05% FS TEB

 0.05% FS TEB

Range

0 - 692 ft (TruBlue 555, 585)

8 - 16 psia (TruBlue 575)

5 - 200,000μs/cm (TruBlue 585)

 0 - 658 ft H2O

 8 - 16 psia

Maximum Over-range

 2X FS (TruBlue 555, 585)

32 psia (TruBlue 575)

 3X FS

 3X FS

Output

 RS-485, SDI - 12

 RS 485, SDI - 12

 RS 485, SDI-12

Data Logging Memory

 8 MB

 8 MB or 56 MB

 8 MB or 56 MB

Operating Temperature 

0°C to 50°C

0°C to 50°C

0°C to 50°C

Dimensions (mm)

 Ø19.0 x 390.0

 Ø19.0 x 222.0

 Ø19.0 x 222.0

Typical Applications

Groundwater monitoring, surface water monitoring, oceanographic research, barometric pressure monitoring

Flood and storm monitoring, wave studies and rapid sampling, stream and stage gaging, slug and pump test, aquifer characterization

 Barometric pressure monitoring
 

KPSI 500, 501

KPSI 351, 353, 355

KPSI 600, 601 - Ceramic

Accuracy
±0.05% FS TEB (KPSI 500) ±0.01 ft H2O (KPSI 501)
±0.10% FS TEB (KPSI 353) ±0.05% FS TEB (KPSI 355) ±0.01 ft H2O (KPSI 351)
±0.05% FS TEB (KPSI 600) ±0.01 ft H2O (KPSI 601)

Range

10 - 230 ft (KPSI 500) 10 - 50 ft (KPSI 501)

10 - 230 ft (KPSI 353, 355) 10 - 50 ft (KPSI 351)

10 - 230 ft (KPSI 500) 10 - 50 ft (KPSI 501)

Maximum Over-range

 2X FS

 2X FS

 5X FS

Output

SDI - 12, RS-485

SDI - 12, RS-485

SDI - 12, RS-485

Operating Temperature 

-20°C to 60°C

-20°C to 60°C

-20°C to 60°C

Dimensions (mm)

Ø25.4 x 197.0

Ø19.0 x 243.0

Ø25.4 x 197.0

Typical Applications
Groundwater monitoring, surface water monitoring, oceanographic research
Groundwater monitoring, surface water monitoring, oceanographic research
Dissolved gas monitoring, trailrace egress monitoring, ground water monitoring, oceanographic research

Digital Temerature Sensors 

 

KPSI 380

Output

 SDI - 12, RS-485

Connection

 Open port nosepiece

Range

 -20°C to 60°C

Accuracy

 ±0.1°C

Dimensions (mm)

 Ø19.0 x 127.0

Typical Applications

 Groundwater monitoring, surfacewater monitoring, storm water, dam operations and stream gaging

Anlog Level Sensors - 1" Bore

 

KPSI 700, 710, 720

KPSI 730, 735
Accuracy  ±1.00%, ±0.50%, ±0.25% FSO  ±0.10%, ±0.05% FSO
Range

Custom ranges from:

2.3 - 700 ft H2O (Vented)

10 - 700 ft H2O (Sealed)

35 - 700 ft H2O (Absolute)

Custom ranges from:

5 - 700 ft H2O (Vented: KPSI 730)

0 - 5 ft H2O to 0 - 700 ft H2O

Sealed, Absolute: KPSI 730)

6 - 700 ft H2O (Vented KPSI 735)
Maximum Over-range  2X FS  2X FS
Output
4 - 20 mA, 0 - 5 VDC,
0 - 2.5 VDC, 0 - 4 VDC,
0 - 10 VDC, 1.5 - 7.5 VDC
4 - 20 mA, 0 - 5 VDC, 0 - 2.5 VDC,
0 - 4 VDC, 0 - 10 VDC,
1.5 - 7.5 VDC
Operating Temperature  -20°C to 60°C  -20°C to 60°C
Dimensions (mm)  Ø25.4 x 86.6 Ø25.4 x 86.6 
Typical Applications Groundwater monitoring, surface water monitoring, oceanographic research, pump control, life stations, landfill leachate Groundwater monitoring, surface water monitoring, oceanographic research, pump control, life stations, landfill leachate
Agency Approvals 
CE, WEEE, RoHS, UL and FM (Intrinsically safe)
 CE, WEEE, RoHS, UL and FM (Intrinsically safe)

Analog Level Sensors - 0.75" Bore 

 

KPSI 320, 330, 335, 342

KPSI 300DS

Accuracy

±0.10%, ±0.05% FSO (KPSI 330, 335)

±0.25% FSO (KPSI 320)

±0.25% FS TEB (KPSI 342)

±0.50% FSO

Range

Custom ranges from:

5 - 700 ft H2O (Vented: KPSI 320, 330, 335)

10 - 700 ft H2O (Vented KPSI 342)

0 - 5 ft H2O to 0-700 ft H2O (Sealed: KPSI 330, 342)

10 - 700 ft H2O (Sealed: KPSI 320)

35 - 700 ft H2O (Absolute: KPSI 320, 330, 342)

Custom ranges from:

700 - 6,921 ft H2O

Maximum Over-range

 2X FS

 2X FS

Output

4- 20 mA, 0 - 5 VDC, 0 - 2.5 VDC, 0 - 4 VDC,

0 - 10 VDC, 1.5 - 7.5 VDC (KPSI 320, 330, 335)

4 - 20 mA (KPSI 342)

4 - 20 mA, 0 - 5 VDC, 0 - 2.5 VDC,

0 - 4 VDC, 0 - 10 VDC, 1.5 - 7.5 VDC

Operating Temperature

-20°C to 60°C (KPSI 320, 330, 335)

-20°C to 85°C (KPSI 342)

-20°C to 60°C

Dimensions (mm)

Ø19.0 x 151.0

Ø19.0 x 215.0

Typical Applications

Groundwater monitoring, surface water monitoring, oceanographic research, pump control, lift stations, landfill leachate, tailrace and forebay monitoring

Down hole, level control, pump control

Agency Approvals 

CE, WEEE, RoHS, UL and FM (Intrinsically safe)

(KPSI 320, 330, 335) CE, WEEE, RoHS (KPSI 342)

CE, WEEE, RoHS

Level Sensors - OEM

 

KPSI 705

KPSI 745, 750

LTA, LT

LTB, LTR

Accuracy

±0.25% FSO

±0.25% FSO

 ±0.25% FSO

 ±0.25% FSO

Options

Optional ETFE

Optional standoff (KPSI 745)

 Optional lightning protection

 Optional lightning protection

Range

Custom ranges from 6 - 115 ft H2O

Custom ranges from 10 - 115 H2O

0 - 1 psi up to 0 - 300 psi

Custom ranges available

0 - 11.5, 23.1, 34.6, 69.2, 115.4 ft H2O

Custom ranges available

Operating Temperature

 -20°C to 60°C

 -20°C to 60°C

 -20°C to 60°C

 -20°C to 60°C

Maximum Over-range

 2X FS

 2X FS

 2X FS

 2X FS

Output

4 - 20 mA, 0 - 5 VDC, 0 - 2.5 VDC, 0 - 4 VDC, 0 - 10 VDC, 1.5 - 7.5 VDC

4 - 20 mA, 0 - 5 VDC, 0 - 2.5 VDC, 0 - 4 VDC, 0 - 10 VDC, 1.5 - 7.5 VDC

4 - 20 mA

4 – 20 mA, 0 – 5 VDC, 0 – 10 VDC, 0 – 2.5 VDC, 0 – 4 VDC, 1.5 – 7.5 VDC

Dimensions (mm)

 Ø25.4 x 86.6

KPSI 745: Ø88.9 x 279.4 (With standoff)

Ø88.9 x 253.3 (Without standoff)

KPSI 750: Ø104.1 x 279.4

LTA: Ø25.4 x 93.0 LT: Ø25.4 x 170.5 (Dependent on fitting)

LTB: Ø104.1 x 206.5 LTR: 287.1 with overmold conduit connection, 253.5 with gland seal conduit connection

Typical Applications

Wastewater, lift stations, pump control, slurry tank liquid level, tank level

Wastewater, lift stations, pump control, slurry tank liquid level, tank level

Pump control, tank liquid level, landfill leachate monitoring, construction bypass pumping, dewatering, lift station monitoring, submersible tank liquid level, liquid line pressure, slurry tank liquid level, wastewater

Pump control, tank liquid level, landfill leachate monitoring, construction bypass pumping, dewatering, lift station monitoring, submersible tank liquid level, liquid line pressure, slurry tank liquid level, wastewater

Agency Approvals 

CE, WEEE, RoHS, UL and FM (Intrinsically safe)

CE, WEEE, RoHS, UL and FM (Intrinsically safe)

CE, WEEE, RoHS, with optional UL, CUL, and FM (Intrinsically safe)

CE, WEEE, RoHS, with optional UL, CUL, and FM (Intrinsically safe)

Non-subersible pressure Transducers - OEM Level Sensors

 

NON-SUBMERSIBLE PRESSURE TRANSDUCERS OEM Level Sensors

KPSI 27,28

NON-SUBMERSIBLE PRESSURE TRANSDUCERS OEM Level Sensors

KPSI 30
Accuracy   ±0.5%, ±0.25%  ±0.1%
Options  IP68 submersible option  IP68 submersible option
Range

 1 - 300 psi (Vented) 5 - 2000 psi (Sealed)

 15 - 2,000 psi (Absolute)

  2 - 300 psi (Vented) 5 - 500 psi (Sealed, absolute)
Maximum Over-range   2X FS  2X FS
Output  4-20 mA, 0-5 VDC, 0-2.5 VDC 0-4 VDC, 0-10 VDC, 1.5-7.5 VDC 4-20 mA, 0-5 VDC, 0-2.5 VDC 0-4 VDC, 0-10 VDC, 1.5-7.5 VDC
Operating Temperature   -20°C to 60°C  -20°C to 60°C
Dimensions (mm)  Ø25.4 x 86.6  Ø25.4 x 86.6
Typical Applications  Line pressure monitoring, pump and lift stations, pump control, tank levelmonitoring, underwater research Line pressure monitoring, pump and lift stations, pump control, tank level monitoring, underwater research
Agency Approvals  CE, WEEE, RoHS, UL and FM (Intrinsically safe) CE, WEEE, RoHS, UL and FM (Intrinsically safe)