Detailed Product Description

Capacitive level meters BCLM-36

Description

Capacitive level meters BCLM are designed for continuous level measurement of liquids, powders and bulk-solid materials in vessels, tanks, sumps, containers, silos, etc.

BCLM consists of the stainless steel housing with removable electronic module and the

measuring electrode. Type of measuring electrode is defi ned by kind of use and type

of measured media. The electrode and its surroundings (the wall of vessel, the reference

tube, etc.) make a capacitor. The value of which is proportional to the depth of immersion

of the electrode. The dielectric is made either from the medium (non-conductive materials) or from the coating of the electrode (conductive materials). Electronic module transforms the capacity to output current signal 4 ? 20 mA, transmittable on big distances by 2-wire cable.

The sensitivity of electronic module can be selected from 8 ranges. Sensitivity (SPAN) and initial capacity compensation (ZERO) can be fl uently set.

BCLMs are offered in version (N) for non-hazardous environments or (Xi) version to explosive areas up to zone 0 or zone 20, high temperature performance and several types of process coupling are also available.

version with rod electrode

BCLM-36_ _-10-_

BCLM-36_ _-11-_

BCLM-36_ _-12-_

 

version with rod electrode and reference tube

BCLM-36_ _-20-_

BCLM-36_ _-21-_

BCLM-36_ _-22-_

 

versions with rope electrode

BCLM-36_ _-30-_

BCLM-36_ _-32-_

 

version with rope electrode with anchor

BCLM-36_ _-31-_

 

high temperature performance

BCLM-36_T-_ _-_

Features of variants

BCLM-36_ _-_ _-M thread process coupling M36x2

BCLM-36_ _-_ _-G thread process coupling G1"

BCLM-36_ _-_ _-Cl sanitary Triclamp process coupling Working areas (acc. to EN 60079-14, EN 50281-1-2) and performance

BCLM-36N(T)-_ _-_ non-explosive

BCLM-36Xi-_ _-_ II1GDT83?CEEXiaIIBT5 with isolating repeater (e.g. IRU-420) whole CLM zone 0, zone 20

BCLM-36XiT-_ _-_ II1/2GDT83?CEEXiaIIBT5 with isolating repeater (e.g. IRU-420) electrode part zone 0, zone 20 housing zone 1, zone 21

 

Technical specifications

Type BCLM-36

Supply voltage: BCLM-36N(T)-_ _-_ BCLM-36Xi(T)-_ _-_

9 ? 36 V DC

9 ? 30 V DC

Current output: low level 4mA high level 20mA

Max. internal values of Xi version Ui=30VDC Ii=132mA Pi=0,99W Ci=370nF Li=0,9mH

Sensitivity ranges 20, 30, 50, 100, 150, 300, 500, 1000 pF

Maximum capacity of medium overrun level 70, 250, 600, 1200, 3000, 7000, 18000, 36000 pF

Initial capacity regulation ratio min. 1:2

Nonlinearity max. 1 %

Temperature error max. 0,05% / K

Voltage error max. 0,3 ?A / V

Internal resistance / electric strength (electrode - housing) 1 M? / 250 V AC

Coupling capacity / electric strength (housing - supply leads)

var. N 51 nF / 250 V AC

var. Xi 26 nF / 500 V AC

Allowed temperature range in zone 0 (EN 50284) -20 to +60?C

Allowed pressure range in zone 0 (EN 50284) 0,8 to 1,1 bar (0,08 to 0,11 MPa)

BCLM-36_ _-10-_ with uncoated rod electrode - for level measurement of non-conductive liquids (oils, diesel, petrol)

and powder or bulk-solid materials (flour, sand, cement, plastic granulates, etc.)

BCLM-36_ _-11-_ with fully PTFE-coated rod electrode - for level measurement of water and electrically conductive liquids incl.

wasted liquids in metallic vessels, concrete sumps, reservoirs, etc., max. length 3 m

BCLM-36_ _-12-_ the same as type 11, insulation of electrode by FEP - better behaviour against aggressive media, lower

adhesion to some complicated media with comparison to PTFE, the same chemical resistance

BCLM-36_ _-20-_ with uncoated rod electrode and reference tube - for accurate level measurement of clean non-conductive liquids (oils, diesel, petrol). By means of reference tube the output signal does not depend on the dimensions and shapes of a vessel. Impossible to use for waste and high viscosity liquids and bulk solid materials.

BCLM-36_ _-22-_ the same as type 21, insulation of electrode by FEP

BCLM-36_ _-30-_ with rope electrode with polyolefin-coated steel rope and stainless steel weight, for level measurement of various bulk-solid materials (grain, plastic granulates, sand, cement, flour, etc.) and non-conductive liquids.

BCLM-36_ _-31-_ as the type 30, in addition dynamic anchorage, for higher silos - up to 20 m

BCLM-36_ _-32-_ with fully coated rope electrode (rope insulation FEP, weight insulation PTFE), for level measurement of electrically conductive and non-conductive liquids - lengths up to 20 m

BCLM-36N_-_ _-_ performance for normal areas

BCLM-36Xi_-_ _-_ performance for explosive areas (combustible dusts, gases or vapours)

BCLM-36_T-_ _-_ high-temperature performance, for max. temperatures in coupling place +200?C

BCLM-36_ _-21-_ with fully PTFE coated rod electrode and reference tube - for accurate level measurement of conductive liquids. Main use is for measurement in plastic vessels or tanks. Impossible to use for waste and high viscosity iquids and bulk-solid materials.