Level Sensors Optical Type VP, Unmodulated * Unmodulated infrared sensor for liquid level detection * Approved for Ex-applications (DC-types) * Built-in amplifier, Ga-As diode * Output: Transistor NPN/PNP or SCR, make or break switching * High chemical resistance to most acids and bases * VP01/03: Output OFF when sensor in liquid * VP02/04: Output ON when sensor in liquid * No electrical or thermal connection between liquid and electrical circuit * LED-indication for output ON (only DC types) * Power supply: DC types: 10 to 40 VDC AC types: 110 or 230 VAC Product Description Optical level sensor with unmodulated, infrared light for the detection of liquids. Fitted with built-in amplifier. Transmitter and receiver are completely self-contained in solid plastic housing designed for mounting into container Ordering Key wall. VP01/02 are available in a Polysulphone housing resistant to most acids and bases. VP03/04 are available in a Polyamide 12 housing resistant to various solvents. VP 0 3 E P Type Housing Output status Output type PNP output Type Selection - DC Types (Ex-approved) Housing material Ordering no. Transistor NPN Make switching Ordering no. Transistor NPN Break switching Ordering no. Transistor PNP Make switching Ordering no. Transistor PNP Break switching Polysulphone Polyamide 12 VP 02 E VP 04 E VP 01 E VP 03 E VP 02 EP VP 04 EP VP 01 EP VP 03 EP Type Selection - AC Types Housing material Ordering no. Make switching 110 VAC Ordering no. Break switching 110 VAC Ordering no. Make switching 230 VAC Ordering no. Break switching 230 VAC Polysulphone VP 02-110TB VP 01-110TB VP 02-230TB VP 01-230TB Specifications Rated operational voltage Rated operational current Continuous Voltage drop No-load supply current Sensing accuracy Liquid level difference Ambient light Frequency of operating cycles (f) Transistor NPN/PNP SCR output AC types 10 - 40 VDC 110 VAC: 100 - 121 VAC, 45 - 60 Hz 230 VAC: 195 - 265 VAC, 45 - 60 Hz 200 mA 1.0 VDC 12 mA 10 - 100 mA 9.0 VAC 7 mA Horizontal mounting: 5 mm Vertical mounting: 2.5 mm 0 - 100 lux 30 Hz Horizontal mounting: 5 mm Vertical mounting: 2.5 mm 0 - 100 lux 5 Hz Specifications are subject to change without notice (05.11.99) 1 VP, unmodulated Specifications (cont.) Environment Degree of protection Operating temperature Storage temperature Indication for output status Housing and tip material VP01/02 VP03/04 Weight Connection Pressure Pipe thread Ex-approval Transistor NPN/PNP SCR output AC types IP 67 -20 to +80C (-4 to +176F) -40 to +100C (-40 to + 100F) LED, yellow IP 67 -20 to +80C (-4 to +176F) -40 to +100C (-40 to + 100F) - Polysulphone Polyamide 12 90 g Cable (PVC), 2 m 10 bar at + 60C 3/8" PT DEMKO certificate of conformity no. 92C.103973X Polysulphone 90 g Cable (PVC), 2 m 10 bar at + 60C 3/8" PT Mode of Operation The conical tip of the sensor forms an angle of 90C. This angle acts as a prism, i.e. the beam, emitted from the GaAs diode placed in one side of the sensor head, is reflected internally to the phototransistor placed in the other side of the sensor head, provided that the tip of the sensor is situated in free air. If the sensor tip is immersed in a liquid, always having a refractive index different from air, the beam will not be refracted by the prism and the photo transistor will not receive any signal. The sensor types can operate in oil, waste water, aqueous solutions such as beer, wine, alcohol etc. without any kind of accessory. Wiring Diagrams Dimensions BU BK BK A BN BU VP01E, VP03E BU BK BK BU BN BU VP01-...TB 2 BN VP01EP, VP03EP BN VP02E, VP04E B The sensor contains IR transmitter, receiver and amplifier with transistor or SCR output. The light source is a Ga-As diode emitting infrared light. BN Pipe thread ISO 228/1-G 3/8" DC-types AC-types A mm O 6.0 O 6.7 B mm O 4.1 O 5.2 VP02EP, VP04EP BN BU VP02-...TB Specifications are subject to change without notice (05.11.99)