SCHMIDT Technology
Technical Data
Measuring quantity Standard velocity wN based on standard conditions of TN = 20 °C and pN = 1,013.25
Media temperature TM
Medium to be measured Clean air, nitrogen, other gases upon request
Measuring range flow wN 0 … 10 / 20 / 40 / 60 m/s
Lower measuring range limit wN 0.2 m/s @ 20 °C
Measurement accuracy 0 … +200 / +350 °C
Measurement accuracy wN Standard: ±3 % of measured value + (0.4 % of final value; min. 0.08 m/s 1)
High precision: ±1 % of measured value + (0.4 % of final value; min. 0.08 m/s 1)
Response time (t90) wN 3 s (jump from 0 to 5 m/s in air)
Temperature gradient wN 8 K/min @ wN = 5 m/s
Recovery time < 10 s after temperature change of ∆ϑ = 40 K @ wN = 5 m/s
Measurement accuracy TM
(wM > 2 m/s)
± 2 K (TM = 10 ... 30 °C)
± 4 K (remaining measuring range)
Operating temperature
Sensor tip 0 … +200 °C / +350 °C
Electronics -20 … +70 °C
Storage temperature -20 ... +85 °C
Humidity Non-condensing, high relative air humidity in combination with high temperature can cause measurement deviations
Operating pressure Atmospheric / 16 bar (over pressure)
Electronic data
Supply voltage 24 V DC ± 20 %
Current consumption typ. 50 mA (max. 250 mA)
Display 4 x Duo LEDs (green / red / orange)
Start up time Approx. 10 s after switch-on
Type / class of protection IP 65 (housing), IP 54 (probe) / III (SELV) or PELV (EN 50178)
Analogue outputs for temperature
and flow rate Auto U / I
 0 … 10 V / 4 … 20 mA (protected against short circuits)
Voltage output: ≥ 550 Ω
Current output: ≤ 500 Ω
Hysteresis: 50 Ω
Load capacity: ≤ 10 nF
Impulse outputs 1. Highside driver to supply voltage (not galvanically isolated)
High level: > supply voltage - 3 V
Short circuit current limitation: 100 mA
2. Semiconductor relay (galvanically isolated); max. 30 V / 50 mA
Frequency of digital outputs 0 ... 100 Hz or 1 impulse / m3 or free selectable frequency (10 ... 100 Hz)
Feldbus (optional) Profibus DP / DeviceNet
Electrical connection Plug-in connector M 12, 8-pole, male, screwed
Maximum cable length Voltage signal: 15 m
Current signal / impulse: 100 m
Mounting position Arbitrary (atmospheric; under higher pressure preferred horizontally)
Installation tolerance ± 3° to flow direction
Weight 550 g max. (400 mm input length),
800 g (field bus version)
Mounting tolerance ±3° relative to flow direction
Minimum tube diameter DN 20 (depending on media temperature)
Weight 750 g max. (fieldbus version)
Probe length (L) 250 / 400 / 600 / 1,000 mm (both versions)
Cable length (remote version) Selectable: 1 ... 10 m (in steps of 10 cm)
Material
Housing Aluminium, anodized
Sensor tube Stainless steel 1.4571
Screw connection Stainless steel 1.4571 or brass (depending on sensor option)
Sensor head Platinum resistor element (glass-passivated), ceramics

1) under reference conditions, related to adjustment reference

Subject to technical changes.