SCHMIDT® Flow Sensor HVAC 100

Cylindrical sensor head (largely independent from flow direction, easy to clean)
Flow and temperature signal
Probe length 144 mm (optional extendable)
Measuring ranges 0 … 2.5 m/s to 0 … 20 m/s

At many applications like ventilation, exhaust and air-conditioning systems, it is necessary to measure flow velocity, mass flow as well as the temperature of the medium to ensure an energy efficient operation of the unit.

The measuring ranges of this sensor have been tailored for the HVAC industry but also for other applications.

Easy-to-install: The HVAC 100 with its 360° measuring head does not have to be aligned to the flow direction and can be extended by additional tubes (variable immersion depth). Furthermore this sensor is maintenance-free, robust, long-term stable and easy-to-clean and therefore fulfills the main requirements for an efficient installation process.

The operating status display via LED enables safe operation at a glance and due to the fully integrated evaluation electronics in the sensor tube there are no further transmitters required.

Ventilation, exhaust and air-conditioning systems
Control of supply air and exhaust air in fume chambers
Filter monitoring
Supply and exhaust air control in digestories

SCHMIDT Technology – Simply a question of better measurement

Specifications

General data
Humidity	Measuring mode: Non-condensing (< 95 % RH)
Operating pressure (max.)	Atmospheric (700 … 1,300 hPa)
Supply voltage	24 V DC ± 20 %
Current consumption	Typ. < 35 mA (max. 80 mA)
Analog outputs for w_N and T_M	2 x 0 … 10 V (R_L ≥ 10 kΩ; C_L ≤ 1 nF)
Electrical connection	Non-detachable cable, pigtail, 4 x 0,25 mm², length 2 m, PVC
Maximum cable length	15 m
Type of protection	IP40
Protection class	III (SELV)
Minimum immersion depth	35 mm
Dimensions	ø 12 mm, probe length 144 mm, extension tube 97 mm (extending length 85 mm)
Weight	50 g (probe)
Delivery content	Probe, mounting clamp, 1 pc. extension tube, manual
Technical data
Measuring quantity	Standard flow velocity w_N based on standard conditions ¹⁾ Medium temperature T_M
Measured medium	Clean air or nitrogen
Measuring range w_N	0 ... 2.5 / 10 / 20 m/s
Lower detection limit w_N	0.2 m/s
Measuring range T_M	0 … +60 °C
Measuring accuracy
Flow w_N	0 ... 2.5 m/s: ±(4 % of measured value + 0.05 m/s)²⁾ 0 ... 10 m/s: ±(4 % of measured value + 0.2 m/s)²⁾ 0 ... 20 m/s: ±(4 % of measured value + 0.4 m/s)²⁾
Response time (t₉₀) w_N	Approx. 10 s (jump of w_N from 0 to 5 m/s)
Temperature gradient w_N	< 1,5 K/min at 5 m/s
Temperature T_M (w_N > 2 m/s)	±1 K (10 … 30 °C); ±2 K (remaining interval)
Operating temperature
Sensor	-10 … +60 °C
Material
Sensor	PC, ABS, Brass nickel plated, PVC (cable sheath)
Extension tube	ABS
Mounting clamp	PA-GF