© Siemens AG 2016 Level Measurement Continuous level measurement - Ultrasonic transducers ST-H ■ Overview ■ Technical specifications Mode of operation Measuring principle Ultrasonic transducer Input Measuring range 0.3 ... 10 m (1 ... 33 ft) Output Frequency 44 kHz Beam angle 12° Accuracy Temperature compensation Compensated by integral temperature sensor Rated operating conditions Pressure 4 Normal atmospheric pressure Ambient conditions Ambient temperature ST-H transducers use ultrasonic technology to measure level in chemical storage and liquid tanks. -40 ... +73 °C (-40 ... +163 °F) (CSA/FM approved model) Design ■ Benefits • Can be mounted on a narrow standpipe • Immune to corrosive and harsh environments • Integral temperature sensor ■ Application The narrow design of the ST-H allows the transducer to be mounted on a narrow standpipe. When mounted correctly, it is completely protected from the process and can even be used in harsh, corrosive environments. During operation, the ultrasonic transducer emits acoustic pulses in a narrow beam perpendicular to the transducer face. The level transceiver measures the propagation time between pulse emission and reception of the echo to calculate the distance from the transducer to the material. Variations in sound velocity due to changes in temperature within the permissible range are automatically compensated by the integral temperature sensor. • Key Applications: chemical storage, liquid tanks Weight1) 1.4 kg (3 lb) Material (enclosure) Base and lid made of ETFE or PVDF (epoxy fitted joint)2) Process connection 2" NPT [(Taper), ANSI/ASME B1.20.1], R 2" [(BSPT), EN 10226] or G 2" [(BSPP), EN ISO 228-1] Degree of protection IP68 Cable connection 2-core shielded/twisted, 0.519 mm² (20 AWG), PVC sheath Cable (max. length) 365 m (1 200 ft) with RG 62 A/U coaxial cable Options Flange adapter 3" Universal (fits DN 65, PN 10 and 3" ASME) Certificates and approvals CE, CSA Class I, II, III, Div. 1, Groups A, B, C, D, E, F, G T3 (ETFE only), FM Class I, II, Div. 1, Groups C, D, E, F, G T4A, ATEX II 2G / INMETRO Ex mb IIC T5 Gb, RCM, KCC 1) 2) 4/174 -20 ... +60 °C (-5 ... +140 °F) (ATEX approved model) Siemens FI 01 · 2016 Approximate shipping weight of transducer with standard cable length When measuring chemicals, check compatibility of ETFE or PVDF and epoxy, or mount joint external to process. © Siemens AG 2016 Level Measurement Continuous level measurement - Ultrasonic transducers ST-H Selection and Ordering data Article No. Selection and Ordering data EchoMax ST-H ultrasonic transducer Level measurement in chemical storage and liquid tanks. The narrow design of the ST-H allows the transducer to be mounted on a 2 inch standpipe. Measuring range: min. 0.3 m (1 ft), max. 10 m (33 ft). 7ML1100- Further designs 77 A 7 0 Please add "-Z" to Article No. and specify Order code(s). Acrylic coated, stainless steel tag [13 x 45 mm (0.5 x 1.75 inch)]: Measuring-point number/ identification (max. 16 characters) specify in plain text Y17 Accessories Article No. 0 1 2 Universal box bracket, mounting kit 7ML1830-1BK 3" ASME, DN 65 PN 10, JIS 10K 3B ETFE flange adapter for 2" NPT 7ML1830-1BT 3 3" ASME, DN 65 PN 10, JIS 10K 3B ETFE flange adapter for 2" BSPT 7ML1830-1BU 4 5 Easy Aimer 2, aluminum, NPT with ¾" x 1" PVC coupling 7ML1830-1AQ Easy Aimer 2, aluminum with M20 adapter and 1" and 1½" BSPT aluminum couplings 7ML1830-1AX Easy Aimer 304, NPT with 1" stainless steel coupling 7ML1830-1AU Easy Aimer 304, with M20 adapter and 1" and 1½" BSPT 304 stainless steel couplings 7ML1830-1GN Click on the Article No. for the online configuration in the PIA Life Cycle Portal. Process connection ETFE, 2" NPT [(Taper), ANSI/ASME B1.20.1] ETFE, R 2" [(BSPT), EN 10226] ETFE, G 2" [(BSPP), EN ISO 228-1] PVDF copolymer, 2" NPT [(Taper), ANSI/ASME B1.20.1] PVDF copolymer, R 2" [(BSPT), EN 10226] PVDF copolymer, G 2" [(BSPP), EN ISO 228-1] Cable length 5 m (16.40 ft) 10 m (32.81 ft) 30 m (98.43 ft) A B C 50 m (164.04 ft) 100 m (328.08 ft) D E Approvals CE, FM Class I, II, Div. 1, Groups C,D,E,F,G T4A ATEX 2G / INMETRO Ex mb IIC T5 Gb, RCM, KCC CSA Class I, II, III, Div. 1, Groups A,B,C,D,E,F,G T3 CE, ATEX 2G / INMETRO Ex mb IIC T5 Gb, RCM, KCC Order code 2 3 4 Operating Instructions Article No. Quick Start Manual, multi-language A5E32105880 Applications Guidelines, multi-language Note: The Operating Instructions should be ordered as a separate line item on the order. All literature is available to download for free, in a range of languages, at http://www.siemens.com/ processinstrumentation/documentation 7ML1998-5HV61 This device is shipped with the Siemens Level and Weighing manual DVD containing the ATEX Quick Start and Operating Instructions library. 1) Available with Process connection options 0 ... 2 only 2) Available with Process connection options 3 ... 5 only 3) Not suitable for Ketone, Hexane, Ester or Ethyl Acetate atmospheres Siemens FI 01 · 2016 4/175 4 © Siemens AG 2016 Level Measurement Continuous level measurement - Ultrasonic transducers ST-H ■ Dimensional drawings 1" NPT Conduit thread 119 (4.7) 20.9 (0.82) Mounting thread (process connection) 74 (2.9) 22 (0.87) Flange Adapter 82 (3.2) 87 (3.4) Diameter 4 ST-H ultrasonic transducer, dimensions in mm (inch) ■ Schematics Direct connection Black White Shield Coaxial extension White Shield 3 Terminal direct* Black White Shield 3 Terminal extension* Black White Shield * For SITRANS LUT400, MultiRanger 100/200, HydroRanger 200 ST-H ultrasonic transducer connections 4/176 Siemens FI 01 · 2016 Coupling Siemens flange adapter