SR50ATH

Measurement Time

< 1.0 s

Output Options

SDI-12 version 1.3, RS-232, RS-485

(output options selected by configuring internal jumpers)

Baud Rates

1200 to 38400 bps

(RS-232, RS-485 modes)

Power Requirements

9 to 18 Vdc

(typically powered by data logger’s 12 Vdc power supply)

Quiescent Power Consumption in SDI-12 Mode

< 1.0 mA

without heater

Quiescent Power Consumption in RS-232/RS-485 Mode

< 1.25 mA

(≤ 9600 bps) without heater

Quiescent Power Consumption in RS-232/RS-485 Mode

< 2.0 mA

(> 9600 bps) without heater

Active Power Consumption

250 mA typical

without heater

Measurement Range

0.5 to 10 m

(1.6 to 32.8 ft)

Beam Acceptance

~30°

Resolution

0.25 mm

(0.01 in.)

Accuracy

±1 cm (0.4 in.) or 0.4% of distance to target (whichever is greatest).

Operating Temperature Range

-45° to +50°C

Temperature Accuracy

±0.2°C

(at 0° to 50°C)

Temperature Accuracy

±0.75°C

(at -45° to 0°C)

Compliance

CE compliant

Diameter

7.5 cm

(3 in.)

Length

10.1 cm

(4.0 in.)

Weight

375 g

(13.2 oz) without cable

Cable Weight

250 g

(8.2 oz) for a 4.57-m (15-ft) cable

Heater

Heater Resistance

75 ohm

Nominal Operating Voltage

12 V

(ac or dc) Use a properly conditioned low-noise power source. A noisy power source will affect operation of the sensor.

Maximum Rated Wattage

3 W

Maximum Rated Voltage

15 V

(ac or dc)

Maximum Operating Temperature

25°C

(Turn the heater power off at temperatures above 25°C. This prevents damage to the sensor and reduces power consumption.)

Maximum Cable Length

-NOTE-

Cable lengths greater than 60 m require a heavier gage wire if the power supply drops below 11 Vdc.

SDI-12

60 m

(200 ft)

RS-232

60 m

(200 ft) Baud rates ≤ 9600 bps

RS-485

300 m

(984 ft)