Technical data

Measurement performance

Property

Methane CH4

Carbon dioxide

CO2

Water vapor H2O

Sensor

CARBOCAPâ

CARBOCAPâ

CARBOCAPâ

Measurement unit Volume-%

Volume-%

Volume-%, dew

point °C

Measurement

range

0–100 vol-%

0–100 vol-%

0–25 vol-%,

−10 … +60 °C

(14 … +140 °F)

Accuracy at

+25 °C (+77 °F)

and 1013 hPa 1) 2)

• 0–40 vol-%:

±2 vol-%

• 40–70 vol-%:

±1 vol-%

• 70–100 vol-%:

±2 vol-%

• 0–30 vol-%:

±2 vol-%

• 30–50 vol-%:

±1 vol-%

• 50–100 vol-%:

±2 vol-%

0–25 vol-%:

±0.5 vol-%

Repeatability 2)

±0.5 vol-% at

60 vol-%

±0.3 vol-% at

40 vol-%

±0.1 vol-% at

2.5 vol-%

Temperature

dependence,

compensated

Compensated, 0–

100 vol-%:

±0.1 % of

reading/°C

Compensated, 0–

100 vol-%:

±0.1 % of

reading/°C

Compensated,

0–25 vol-%:

±0.1 % of

reading/°C

Temperature

dependence,

uncompensated

Uncompensated,

0–100 vol-%:

-0.9 % of

reading/°C

Uncompensated,

0–100 vol-%:

-0.9 % of

reading/°C

Uncompensated,

0–25 vol-%:

-0.4 % of

reading/°C

Pressure

dependence,

compensated

Compensated, 0–

100 vol-%:

±0.015 % of

reading/hPa

Compensated, 0–

100 vol-%:

±0.01 % of

reading/hPa

Compensated,

0–25 vol-%:

±0.06 % of

reading/hPa

Pressure

dependence,

uncompensated

Uncompensated,

0–100 vol-%:

+0.2 % of

reading/hPa

Uncompensated,

0–100 vol-%:

+0.2 % of

reading/hPa

Uncompensated,

0–25 vol-%:

+0.2 % of

reading/hPa

Long-term

stability

±2 vol-%/year

±2 vol-%/year

±2 vol-%/year

Start-up time 3)

30 s

Warm-up time 4)

2 min 5)

Response time

(T90)

90 s 6)

Response time

with flow-through

adapter

90 s at ≥ 0.5 l/min 6)

(recommended: 0.5–1 l/min)

1)

Excluding cross-interferences to other gases.

2) Accuracy specification at 25 °C (+77 °F) and 1013 hPa including non-linearity, calibration uncertainty,

and repeatability; temperature and pressure compensated.

3) Time to first reading

4) Time to specified accuracy

5) At +20 °C (+68 °F) ambient temperature

6) With standard PTFE filter

Inputs and outputs

Operating voltage

18–30 V DC

Power consumption

Typical: 3 W

Maximum: 6 W

Digital output

RS-485 (Modbus RTU)

Analog output

3 × 4–20 mA scalable, isolated

Analog output load

Minimum: 0 Ω

Maximum: 500 Ω

Analog output accuracy

±0.2 % of full scale at 25 °C (77 °F)

Analog output temperature

dependence

0.005 %/˚C (0.003 %/°F) full scale

Analog input (optional)

1 × 4–20 mA (Ex ia) for external

pressure or temperature sensor 1)

1)

The optional analog input is galvanically isolated and provides power for the connected external

pressure sensor.

Compliance

Electromagnetic compatibility (EMC)

EN 61326‑1, industrial environment

Compliance marks

CE, China RoHS, RCM

Ex approval marks

EU (ATEX), international (IECEx),

US/CAN (cMETus), Japan (CML),

UK(UKEX), Korea (KCs) 1)

Ex classification

Ex II 1/2 (1) G Ex eb mb [ia] IIB T3

Ga/Gb -40 °C ≤ Tamb ≤ +60 °C

Class I, Division 2, Groups C, D; T3

1)

See product documentation for full Ex classifications for each region.

Operating environment

Operating temperature range

−40 ... +60 °C (−40 ... +140 °F)

Operating humidity range

0–100 %RH

Storage temperature range

−40 ... +60 °C (−40 ... +140 °F)

Storage humidity range

0–90 %RH

Process pressure range

−500 ... +500 hPa

Process temperature range

+0 ... +60 °C (+32 ... +140 °F)

Process flow range

0–20 m/s

Mechanical specification

Weight

3 kg (6.6 lb)

Thread type

1.5" male NPT

Mechanical pressure tolerance

20 bar(g)

Cable lead-throughs

1 × M16×1.5

2 × M20×1.5

IP rating

IP66

Materials

Probe body

AISI316L stainless steel, PPS

Filter cap

Sintered PTFE

Options and accessories

Configuration cable (RS-485/USB) 1)

257295

Flow-through adapter

258877

Sintered PTFE filter (includes O-ring)

DRW249919SP

NPT 1.5" thread test plug

257525SP

1)

Vaisala Insight software for Windowsâ available at www.vaisala.com/insight

Ø 32

[1.26]

mm

[in]

NPT 1 .5” (MALE)

Ø 40 [1.57]

Ø 68 [2.67]

403 [15.87]

Ø 34 [1.34]

30 [1.18]

[1.85]

47

210 [8.27]

193 [7.6]

16.5 [0.65]

Ø 94 [3.7]

28 [1.1]

155 [6.1]

414 [16.3]

248 [9.76]

WRENCH 50 [1.97]

ALLEN 5 [3/16]

MGP261 dimensions

Published by Vaisala | B211728EN-F © Vaisala 2023

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