SCHMIDT® Flow Sensor SS 23.400 ATEX

Specifications

Technical data
Measuring quantity	Standard flow velocity w_N based on standard conditions ¹⁾
Measured medium	Clean air or nitrogen, additional gases on request
Measuring range w_N	(±)0 … 1 / 2.5 / 5 / 10 / 20 m/s (uni- or bidirectional)
Lower detection limit w_N	(±)0.05 m/s
Measuring accuracy
Standard w_N	±(3 % of measured value + [2 % of fmr; min. 0.05 m/s]) ²⁾
High precision (optional) w_N	±(1 % of measured value + [2 % of fmr; min. 0.04 m/s]) ²⁾
Response time (t₉₀) w_N	1 s (configurable: 0.01 … 10 s)
Operating temperature
Sensor	0 … +60 °C
Storage temperature	-20 … +85 °C
Material
Sensor head	Stainless steel 1.4404
Sensor tube	Stainless steel 1.4404
Plug-in connector, nut screw	Stainless steel 1.4404
General data
Humidity	Measuring mode: Non-condensing (< 95 % RH)
Operating pressure (max.)	Atmospheric (700 … 1,300 hPa)
Supply voltage	12 … 26.4 V DC
Current consumption	Typ. < 35 mA (max. 150 mA; including signal current of switching outputs)
Analog output w_N	0 … 10 V (R_L > 10 kΩ; C_L ≤ 10 nF; short-circuit protected) 4 … 20 mA (R_L < 300 Ω; C_L ≤ 100 nF)
Switching outputs	2 x open collector (at GND), current-limited and short-circuit protected, configurable -Channel 1 (OC1): Flow direction or threshold value - Channel 2 (OC2): Threshold value - External switching voltage / current: Max. 26.4 V DC / 55 mA (typ. 50 mA) - Hysteresis: 5 % of threshold value (min. ±0.05 m/s)
Electrical connection	Plug-in-connector M9, male, 7-pin (shielded), screwed
Maximum cable length	Voltage interface: 15 m; Current interface: 100 m
Mounting position	Arbitrary
Protection type	Sensor probe: IP66 Plug-in connection: IP67 (with correct attached cable)
Protection class	III / PELV (EN 50178)
ATEX declaration	Gas (zone 2): II 3G Ex nA IIC T4 Gc
Probe length	130/200/300 mm
Weight	Approx. 60 g max. (300 mm Sensor length)

¹⁾ Standard conditions: T_N = 20 °C and p_N = 1,013.25 hPa

²⁾ Related to adjustment reference; "fmr" = final measuring range

Subject to technical changes

Order information

	Description	Article-Number
Basic sensor	SCHMIDT^® Flow Sensor SS 23.400 ATEX, thermopile head, with ATEX* category 3G, zone 2)	513 970 -	X	Y	D	Z	R	4	P
	Options
Mechanical type	Sensor length 130 mm (only with 0 … 10 V output available)		1
	Sensor length 200 mm		2
	Sensor length 300 mm		3
Measuring range	Measuring range 0 … 1 m/s			1
	Measuring range 0 … 2.5 m/s			2
	Measuring range 0 … 5 m/s			3
	Measuring range 0 … 10 m/s			4
	Measuring range 0 … 20 m/s			5
Measurement direction, adjustment accuracy and calibration	Unidirectional – standard adjustment				1
	Unidirectional – standard adjustment with factory calibration certificate				6
	Bidirectional – standard adjustment				2
	Bidirectional – standard adjustment with factory calibration certificate				7
	Unidirectional – high precision adjustment incl. factory calibration certificate				3
	Bidirectional – high precision adjustment incl. factory calibration certificate				4
	Unidirectional LF - optimized for Laminar Flow application, high precision, with factory calibration certificate (only for measuring range 1 m/s)				5
Output signals	0 … 10 V					1
Output signals	4 … 20 mA (not for length 130 mm)					5
Direction representation	Bidirectional: switching output OC 1						1
	Bidirectional: halved analog signal (0 m/s = 12 mA / 5 V)						2
	Unidirectional						3
Sensor programming	Factory setting								S
Sensor programming	Customer-specific programming								K

* Use of the sensor in the ATEX zone only in conjunction with the original connecting cable 535 279

Accessories

Connection technology

Description	Article-Number
Connection cable with coupler socket, 5 m length, open cable ends, material PUR	535 279
Power supply unit: output 24 V / 1A DC, supply voltage 115/230 V AC (strip terminal)	535 282

Mounting and fixing technology

Description	Article-Number
Wall mounting flange, stainless steel 1.4571	520 181
Compression fitting stainless steel, G½, atmospheric pressure	532 160
Wall mounting bracket, aluminium, anodized	503 895
Mounting flange, stainless steel 1.4404	551 740
Assembly kit for pipe assembly suitable for MD 10.010/10.015 including pipe clamps and collar for adjustment to pipe diameter	531 394

Measured value display

Description	Article-Number
LED display MD 10.010 in wall housing to show volume flow and flow velocity, 85 … 250 V AC and sensor power supply	527 320
LED display MD 10.010, similar to 527 320 but with 24 V DC voltage supply	528 240
LED display MD 10.015, similar to 527 320 but with an additional sum function and a second measuring input	527 330
LED display MD 10.015, similar to 527 330 but with 24 V DC voltage supply	528 250

Miscellaneous