APPLICATION
The LD31 general purpose submersible pressure level transmitter provides continuous liquid level measurement up to 34.65’ (10.5m) of water column with a 4-20 mA signal output. Offered in three level measurement ranges, select the appropriate model based on your tank height or well depth. For convenient installation with junction box termination, package your level sensor with the pressure sensor mounting kit. Each kit includes a junction box with terminal strip, mounting plug and liquid tight cable connector. The LD31 level pressure sensor is well suited for clean liquids compatible with 316 SS and polyurethane such as well water and diluted chemicals.
FEATURES
- Rugged sensor designed for complete submergibility
- 316 stainless steel sensor body with polyurethane cable
- Maintenance-free vent tube with filter ensures accuracy
- Mounting kit for easy tank install and conduit termination
- Integral surge protection for lightning strikes or power surges
- Automatic temperature compensation for reliable measurement
PRICING
| P/N | Description | From | |
|---|---|---|---|
 |
LD31-S101 | GP submersible pressure level sensor, 11.55’ wc (5 psi), 40’ cable | $600.00 |
| LD31-S111 | GP submersible pressure level sensor, 23.1’ wc (10 psi), 40’ cable | $650.00 | |
| LD31-S121 | GP submersible pressure level sensor, 34.65’ wc (15 psi), 60’ cable | $700.00 |
COMPATIBLE ACCESSORIES
| P/N | Description | From | |
|---|---|---|---|
 |
LI55-1001 | GP level sensor controller, 85-265 VAC, relay & repeater options | $700.00 |
 |
LI23-1001 | GP level sensor indicator, 12-30 VDC, relay & repeater options | $502.00 |
 |
LM92-1002 | Single NEMA box, 1/8 DIN, windowed, PC | $458.00 |
 |
LM92-2002 | Double NEMA box, 1/8 DIN, windowed, PC | $490.00 |
 |
LC95-2001 | Power supply, 100-240 VAC, 24 VDC @ 0.45A | $335.00 |
DOCUMENTATION
SPECIFICATIONS
Range: -S101: 0 to 5 psi (0.34 bar) or 0 to 11.55’ (0 to 3.5m) wc; -S111: 0 to 10 psi (0.69 bar) or 0 to 23.1’ (0 to 7.0m) wc; -S121: 0 to 15 psi (1 bar) or 0 to 34.65’ (0 to 10.6m) wc
Accuracy: ± 0.25% of full scale
Configuration: None, fixed span
Supply voltage: 11 to 28 VDC
Loop resistance: 900 Ohms max @ 30 VDC
Signal output: 4-20 mA, two-wire
Process temp.: F: 14º to 176º; C: -10º to 80º
Temp. comp.: Automatic
Burst pressure: 2 x full scale
Response time: 50ms
Sensor material: 316 stainless steel, Buna-N, PVC
Enclosure rating: NEMA 6P (IP68)
Cable type: 2-conductor, shielded with filtered vent tube
Cable material: PUR (polyurethane)
Cable length: -S101 & S111: 40’ (12.2m); -S121: 60’ (18.3m)
Classification: General purpose
Compliance: CE, RoHS
MOUNTING KIT
The pressure mounting kit makes installation easy. Route the sensor cable through the liquid tight connector, drop the sensor through the tank fitting and terminate in the junction box.
