SENSVISION HLC 890 – An Equivalent to the BD Sensors LMK 809
The BD Sensors LMK 809 is a plastic submersible hydrostatic level probe for continuous measurement in highly polluted and chemically aggressive liquids. It uses a flush-mounted capacitive ceramic sensor with a 99.9% high-purity Al₂O₃ diaphragm in a PP-HT housing, with PVDF available as an option, and covers nominal ranges from 0 … 0.4 mH₂O up to 0 … 100 mH₂O at a standard accuracy of ±0.35% FSO, or ±0.25% FSO optionally to IEC 60770.
The SENSVISION HLC 890 is a directly equivalent plastic level probe covering the same 0 to 0.4 mH₂O through 0 to 100 mH₂O span across thirteen standard steps, corresponding to nominal pressures of 0.04 bar to 10 bar gauge, with matching accuracy of up to ±0.35% of span as standard and up to ±0.25% of span optionally. Long-term stability is quoted at up to ±0.1% of span per year and thermal error at up to ±0.1% of span per 10 K.
The high-purity ceramic is what separates this pair from lighter-duty plastic probes. Both the LMK 809 and the HLC 890 specify a 99.9% Al₂O₃ diaphragm rather than the 96% grade, mounted flush so that solids carried in the liquid cannot pack into a cavity in front of the sensor. Wetted materials are plastic throughout – PP-H or PP-HT as standard with PVDF optional, and FKM, EPDM or FFKM seals – which is what allows these probes to be submerged in acids, alkalis, viscous media and heavily contaminated water where a stainless steel probe would not survive. The HLC 890 body is 45 mm in diameter and weighs approximately 320 g without cable, matching the LMK 809.
Both probes hang on a suspension cable that carries the integrated atmospheric reference tube for gauge measurement, with PUR, FEP and TPE-U sheaths common to both and PVC additionally offered on the HLC 890 at 7.4 mm cable diameter. Both are sealed to IP 68 for permanent submersion. The LMK 809 offers a 2-wire 4 … 20 mA output and a 3-wire 0 … 10 V alternative; the HLC 890 matches this with 4 to 20 mA two-wire on a 9 to 32 VDC supply and an optional 0 to 10 V three-wire version on 12.5 to 32 VDC, adding integrated lightning protection on the two-wire version. Note that the PVDF housing restricts the permissible temperature to −30 °C to 60 °C against −20 °C to 80 °C for the standard plastic body, so the housing material should be chosen against the medium temperature as well as its chemistry.
Whether you are replacing an installed BD Sensors LMK 809 or specifying a chemically resistant level probe for a new acid, alkali or effluent storage application, the SENSVISION HLC 890 delivers equivalent measurement performance, wetted materials and output options as a dependable, cost-effective alternative.
BD SensorsTM and associated part numbers (e.g., LMK 809) 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 HLC 890
The SENSVISION HLC 890 has been engineered to provide the same fit, form, function and performance as the BD Sensors LMK 809, making it an ideal replacement for existing installations and new OEM applications.
Key Features:
Nominal level ranges from 0 to 0.4 mH₂O up to 0 to 100 mH₂O across thirteen standard steps
Nominal pressure ranges from 0.04 bar to 10 bar gauge
Standard accuracy up to ±0.35% of span, optional up to ±0.25% of span
Long-term stability up to ±0.1% of span per year; thermal error up to ±0.1% of span per 10 K
4 to 20 mA, two-wire output on 9 to 32 VDC, or optional 0 to 10 V, three-wire on 12.5 to 32 VDC
Chemically resistant PP-H housing as standard, PVDF optional, 45 mm diameter
Flush-mounted ceramic Al₂O₃ 99.9% high-purity diaphragm
Seal options in FKM, EPDM or FFKM to suit the medium
PVC, PUR, FEP or TPE-U cable, 7.4 mm diameter, with integrated atmospheric reference tube
Overpressure resistance 2 to 25 bar; maximum ambient housing pressure 10 bar
Mean response time under 200 ms, maximum 380 ms; 5 measurements per second
Compensated temperature range −20 °C to 80 °C; PVDF version −30 °C to 60 °C
Maximum current consumption 21 mA; turn-on time 700 ms
IP 68 ingress protection, approximately 320 g without cable
Short-circuit, reverse-polarity and integrated lightning protection on the two-wire version
Electromagnetic compatibility in accordance with EN 61326
R1 inch preparation for mounting with plastic pipe
The SENSVISION HLC 890 is manufactured to deliver equivalent performance, reliability and installation compatibility, offering a cost-effective alternative for aggressive media and heavily contaminated liquid level measurement.