SCHMIDT® Flow Sensor SS 20.600
| Technical Data | |
|---|---|
| Measuring quantity wN | Standard flow velocity wN normalized to TN = 20 °C and pN = 1,013.25 hPa |
| Measuring fluid | Air or nitrogen Optional: natural gas, biogas, CO2, special gases and gas mixtures |
| Measuring range flow wN | 0 … 10 / 20 / 60 / 90 / 140 / 220 m/s Optional: customised measuring ranges in 0.1 m/s steps |
| Lower detection limit wN | 0,2 m/s |
| Measuring range temperature TM | SS 20.600: -20 … +120 °C SS 20.600 EX: -40 … +120 °C |
| Accuracy | |
| Standard wN | ± 3 % of measured value + (0.4 % fmr; min. 0.08 m/s)* |
| High precision wN (option for air, nitrogen, oxygen only) |
± 1 % of measured value + (0,4 % fmr; min. 0,08 m/s)* |
| Repeatability wN | ± 1 % of measured value |
| Response time (t90) wN | 1 s (jump from 0 to 5 m/s air) |
| Temperature gradient wN | < 8 K/min at wN = 5 m/s |
| Measurement accuracy temperature TM | ± 1 K (10 … 30 °C); ± 2 K remaining measuring range (at wN > 5 m/s) |
| Operating temperature | |
| Sensor | SS 20.600: -20 … +120 °C SS 20.600 EX: -40 … +120 °C |
| Electronics | -20 … +70 °C |
| Storage temperature | -20 … +85 °C |
| Material | |
| Housing | Aluminium, anodized |
| Sensor tube, screw connection | Stainless steel 1.4571 |
| Sensor head | Platinum resistor element (glass-passivated), PPO / PA |
| Protective sleeve (ATEX-Option) | Aluminium, anodized |
| Sensor cable |
Jacket (PUR, halogen free, UL) |
| Allgemeine Daten | |
| Medium, environment | Non-condensing (up to 95 % rH) |
| Maximum pressure | 16 bar or 40 bar |
| Display | 4 x duo-LEDs green / red / orange |
| Supply voltage | 24 V DC ± 20 % |
| Current intake | Approx. 50 mA (without impulse outputs); max. 250 mA |
| Analogue outputs for temperature and flow (type: Auto U / I) |
0 … 10 V / 4 … 20 mA (protected against short circuits) Voltage output: ≥ 550 Ω Current output: ≤ 500 Ω Hysteresis: 50 Ω |
| Impulse outputs | Frequency wN / 0 … 100 Hz optional: 1 impulse / 1 m3; 1 Impulse / 0.1 m3; 1 impulse / 0.01 m3 (max. 100) |
| Impulse outputs | 1. Highside driver to supply voltage (not galvanically isolated) high level: > supply voltage - 3 V 2. Semiconductor relay (galvanically isolated) max. 30 V / 50 mA |
| Electrical connection | Plug-in connector M 12, screwed, 8-pin, male |
| Maximum line length | Voltage signal: 15 m, Current signal/ impulse: 100 m |
| Mounting position | Any, (with vertical downdraft: lower limit of measuring range 2 m/s at 16 bar) |
| Installation tolerance | ± 3° to the flow direction |
| Minimum immersion depth | DN 25 |
| Type/ class of protection | Sensor: IP 67; housing: IP 65 / III or PELV |
| ATEX-category | II 3G Ex nA ic IIC T4 Gc |
| Sensor length | Compact sensor: 120 / 250 / 400 / 600 mm; special lengths from 120 to 1,000 mm Remoted: Sensor 120 / 250 / 400 / 600 mm Cable: 1 … 10 m (in steps from 0.1 m) |
| Weight | Approx. 500 g max. (without connection cable) |
* under reference conditions, related to adjustment reference
Subject to technical changes.
