Catalog excerpts
STANDARD SUBMERSIBLE PRESSURE TRANSMITTER DESCRIPTION ALZ 3720 is a general purpose submersible hydrostatic level transmitter. High quality silicon piezoresistive sensor, robust stainless steel housing and a hydrometric cable with the ventilation tube make ALZ 3720 reliable and cost effective solution for a wide variety of industrial level measurement applications. SPECIFICATIONS Ranges: 1 mH2O up to 250 mH2O Basic accuracy: ±0.25% Probe: Ø27 mm, AISI 316L stainless steel Outputs: 4...20 mA; 0...20 mA; 0...10 V; 0...5 V; RS-485 / Modbus RTU Sensor: silicon piezoresistive Optional: Ex ia, HART®, Pt100 temperature sensor APPLICATIONS Water, wastewater Fuels, oils Tanks, wells Pump protection Appearance, mounting kit contents and/or specifications are subject to change without prior notice. We are constantly working on further improvement of our products. Delivery is subject to standard terms of delivery. © 2020 Piezus Page 1. Version: 11.0 Date: 20.05.2020
Open the catalog to page 1TECHNICAL SPECIFICATIONS MEASURING RANGES Pressure range, bar 0...0.10 0...0.16 0...0.25 0...0.40 0...0.60 0...1.0 0...1.6 P > 0.4 bar P ≤ 0.4 bar Accuracy, % of span* ≤ ±0.25 (standard) / 0.20 (optional) ≤ ±0.5 (standard) Temperature effect, (% of span / 10 °C) ≤ ±0.1 ≤ ±0.2 Compensated range -20…+70 °C 0…+70 °C Power supply effect ≤ ±0.05% of span / 10 V Load resistance effect ≤ ±0.05% of span / kOhm (transmitters with current output) Long term stability ≤ ±0.1% of span / year Response time (10...90%) ≤ 1 ms * Accuracy includes non-linearity, hysteresis and non-repeatability. OPERATING...
Open the catalog to page 2ELECTRICAL SPECIFICATIONS Output signal Power supply, US Load resistance, R 4…20 mA / 2-wire 12…36 V ≤ [(US – 12 V) / 0,02 A] Ohm* 4…20 mA / HART® 4…20 mA / 3-wire ≤ 500 Ohm 0…20 mA / 3-wire 12…36 V 0…10 V / 3-wire ≥ 10 kOhm 0…5 V / 3-wire ≥ 5 kOhm 0.5…4.5 V / 3-wire 5 V / 6…15 V RS-485 / Modbus RTU 12…36 V * For output signal 4…20 mA / HART® minimum load resistance for digital communication: 250 Ohm. Safe values for intrinsically safe design Ex ia IIC T6…T4 Ga X: Voltage: Ui = 28 V Current: Ii = 93 mA Power: Pi = 660 mW Maximum internal capacitance: Ci = 15 nF Maximum internal inductance:...
Open the catalog to page 3ORDERING CODE UNIT OF MEASUREMENT CABLE LENGTH OUTPUT SIGNAL PVC PUR FEP Other (specify when ordering) any length in meters (e.g., 010M means 10 meters) 4…20 mA / 2-wire (standard) 4…20 mA / 2-wire Ex ia IIC T6…T4 Ga X 4…20 mA / 3-wire 0…20 mA / 3-wire 0…10 V / 3-wire 0…5 V / 3-wire 0.5…4.5 V / 3-wire Ex ia IIC T6…T4 Ga X RS-485 / Modbus RTU 4…20 mA / HART® Other (specify when ordering) Page. 4. Ordering code. Version: 11.0 Date: 2
Open the catalog to page 4ORDERING CODE (CONTINUED) ALZ 3720 FKM NBR EPDM Other (specify when ordering) Standard Pt100 temperature sensor Other (specify when ordering) Anchoring clamp for submersible transmitter PZ 1024 Power supply unit BZ 05 / BZ 10 Dry air junction box for submersible transmitters Page. 5. Ordering code. Version: 11.0 Date: 20.05.2020
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