SENSVISION HLS 330 – An Equivalent to the BD Sensors LMP 331
The BD Sensors LMP 331 is a stainless steel screw-in level transmitter with a G 3/4″ flush pressure port. It is mounted into the vessel wall or process line rather than suspended in the liquid, and the flush diaphragm sits level with the process boundary so there is no cavity for product to collect in. That makes it the right choice for viscous, pasty or crystallising media that would block the narrow bore of a conventional recessed port. Nominal ranges run from 0 … 100 mbar to 0 … 40 bar with standard accuracy of ±0.35% FSO.
The SENSVISION HLS 330 is the direct equivalent: a stainless steel screw-in transmitter with a G 3/4″ flush process connection to DIN 3852, covering nominal level ranges from 0 … 1 mH₂O to 0 … 400 mH₂O — equivalent to 0.1 to 40 bar gauge, matching the LMP 331 span. Standard accuracy is up to ±0.35% of span from 0.4 bar (up to ±0.5% below 0.4 bar), with a ±0.25% option and a 0.1% precision option, mirroring the LMP 331 accuracy grades exactly.
Neither of these is a submersible probe. Both are process-mounted instruments that thread into a boss, flange adaptor or pipe fitting and measure the hydrostatic head of liquid above the diaphragm. Because the sensing surface is flush and easily wiped or cleaned in place, both suit process tanks and vessels, water and wastewater treatment, pumping stations, recycling plant, industrial storage and closed-vessel level control.
Output and supply options line up closely. Both offer a 4–20 mA two-wire output as standard with 0–20 mA and 0–10 V three-wire alternatives; the HLS 330 runs from 8–32 VDC on the two-wire version, the same supply window as the LMP 331. Response time is 10 ms or less on two-wire and 3 ms or less on three-wire for both instruments, with 200 ms on the 0.1% precision option. Thermal behaviour matches too: up to ±1% of span below 0.4 bar and ±0.75% from 0.4 bar, with long-term stability of ±0.1% of span per year.
Materials, approvals and environmental ratings align. Both use a stainless steel 1.4404 (316L) pressure port and housing with a 1.4435 (316L) diaphragm and FKM seals as standard, EPDM and NBR available. Both offer intrinsically safe Ex ia versions for gas and dust atmospheres on the 4–20 mA two-wire output and SIL 2 configurations to IEC 61508 and IEC 61511, and both share a permissible medium temperature range of −40 to 125 °C. Whether you are replacing an existing BD Sensors LMP 331 or specifying a flush-diaphragm screw-in level transmitter for a new application, the SENSVISION HLS 330 provides a dependable, cost-effective alternative.
BD SensorsTM and associated part numbers (e.g., LMP 331) are trademarks or registered trademarks of BD Sensors GmbH. Diversified Technologies is an independent distributor and is not affiliated with, endorsed by, or sponsored by BD Sensors GmbH. References to BD Sensors and associated part numbers on this website are used strictly for informational, comparative, and cross-referencing purposes to assist customers in finding functional alternatives. All trademarks are the property of their respective owners.
Further Information on the HLS 330
The SENSVISION HLS 330 has been engineered to provide the same fit, form, function and performance as the BD Sensors LMP 331, making it a direct alternative for existing installations and for new specifications.
Key Features:
G 3/4″ flush process connection to DIN 3852 — crevice-free diaphragm for viscous, pasty and crystallising media
Nominal level ranges from 0 … 1 mH₂O to 0 … 400 mH₂O (0.1 to 40 bar gauge)
Standard accuracy up to ±0.35% of span from 0.4 bar; up to ±0.5% below 0.4 bar
Optional ±0.25% accuracy, and a 0.1% precision option to IEC 60770
4–20 mA two-wire output as standard; 0–20 mA and 0–10 V three-wire options
Supply voltage 8–32 VDC for the 4–20 mA two-wire version
Response time 10 ms or less (two-wire), 3 ms or less (three-wire)
Long-term stability up to ±0.1% of span per year
Stainless steel 1.4404 (316L) port and housing, 1.4435 (316L) diaphragm
FKM seals as standard, with EPDM and NBR options
Permissible medium temperature −40 to 125 °C; electronics and ambient −40 to 85 °C
Intrinsically safe Ex ia versions for gases and dusts (4–20 mA two-wire)
SIL 2 configurations to IEC 61508 and IEC 61511
IP65 to IP68 depending on electrical connection; ISO 4400, Binder 723, M12, field housing, cable gland and cable outlet options
Vibration 10 g RMS, shock 500 g, operational life over 100 million cycles
The SENSVISION HLS 330 is built to deliver equivalent performance, reliability and installation compatibility to the BD Sensors LMP 331, allowing users to change over with confidence while retaining the same G 3/4″ flush process connection, measuring range, accuracy grades and safety approvals.