CS250DM

Pt-1000 Class A, Precision Air Temperature Sensor with Digital Modbus RS-485 Output
CS250DM

CS250DM

RetiredConfigurable

Pt-1000 Class A, Precision Air Temperature Sensor with Digital Modbus RS-485 Output

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Model:
CS250DM
Item Number:
35037
Warranty:
1 year
Lead time:
21 days

Overview

CS250DM PT-1000 Class A PRECISION AIR TEMPERATURE SENSOR (-50 to 350C) w/DIGITAL MODBUS RS-485 Output

The CS250DM is a Pt-1000 Class-A air temperature sensor for temperature gradient and stability analysis. This sensor delivers extremely accurate and precise air temperature data that is necessary for IEC 61724 Class-A solar monitoring applications and Delta Temperature (ΔT) calculations. It also includes a digital Modbus RS-485 output, ensuring data quality over long cable lengths.

Technical Description

The CS250DM uses a precision Pt-1000 Class A platinum resistor thermometer (PRT) to provide the highest level of accuracy. The cable includes a Campbell Scientific precision analog-to-digital, smart-sensor module for making the measurements. The module design is optimized for the class A PRT that minimizes self-heating and lead-wire resistance. Measurement electronics are surge protected with 1200 V isolation and environmentally protected with a rugged overmolding with an IP65 rating.

When exposed to sunlight, the CS250DM should be housed in the RAD06 6-plate radiation shield.

Benefits

  • High accuracy and precision
  • Exceeds IEC 61724-1 standards for ambient air temperature measurements
  • Exceeds EPA standards for ΔT measurements
  • Digital Modbus RS-485 output ensuring data quality over long cable lengths
  • Best-in-class noise protection and isolation meet IEC Class 4 standards
  • NIST-traceable, serialized calibration certificate supplied with every sensor

Specifications

Measurement Uncertainty
±0.3°C
Element Stem Material
316L stainless steel sheathed
Surge Protection
1200 V isolation
Supply Voltage
5 to 30 Vdc
Power Draw
15 mA
Temperature Coefficient
TCR = 3850 ppm/K
Stem Diameter
0.32 cm

(0.125 in.)

Overall Stem Length
6.35 cm

(2.5 in>0

Sensor Dimensions
17.15 x 11.13 x 6.05 cm

(6.75 x 4.38 x 2.38 in.)

Sensor Weight
90.7 g

(0.2 lb)

Sensing Element

Precision
1000 ohm Class A platinum

(Pt 1000)

Accuracy
±(0.15 + 0.002T)°C
Long-Term Stability
Maximum Ro drift = 0.04% after 1000 hours at 400°C
Measurement Temperature Range
–75° to +250°C
Time Constant
15 seconds in 5 m/s wind

Communications

Protocol
Modbus RTU protocol

(over RS-485)

Format
8 data bits, 1 stop bit, even parity as default

(user-configurable)

Baud Rate
19,200 bps as default

(user-configurable)

Modbus ID
Last two digits of serial number as default

(user-configurable)

Cable (Sensor Head to DM Board)

Wire Size and Type
24 AWG (7/32,RT38) copper
Insulation Type
PFA insulated

(Teflon®)

Insulation Rating
–75° to +250°C
Sheath
Thin PFA sheathed overall
Number of Cores
3
Physical Properties
Good abrasion and moisture resistance
Overall Diameter
2.1 mm

(0.08 in.)

Cable (DM Board to PT)

Wire Size and Type
24 AWG (7/32) tinned copper
Insulation Type
PVC
UL
AWM 10012 1000V 105°C
Filler
Fibrillated polypropylene as required for uniform round construction
Drain
24 AWG (7/32) tinned copper

(cabled, touching foil)

Shield
Aluminum/Mylar

(100% coverage, 25% minimum overlap, foil facing in)

Nominal Wire Diameter
0.61 mm

(0.024 in.)

Related Resources

Documents

Connect With Us

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Phone Numbers
General: (435) 227-9000
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Corporate Address
815 W 1800 N
Logan, UT 84321
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Email Address
sales@campbellsci.com

As a trusted leader in measurement systems for more than 50 years, our top priority at Campbell Scientific has always been to provide the most accurate, reliable data for research and industry.