GMP251

GMP251 VAISALA | Alldatasheet

Document overview

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Technical content

Features

• Measurement range 0 … 20 %CO 2
• Intelligent, standalone probe with analog and digital outputs
• Compatible with Vaisala Indigo products, Insight PC software, and RFL100 data logger
• Wide operating temperature range (−40 … +60 °C) (−40 … +140 °F)
• IP65-classified housing
• Integrated temperature measurement for CO2 compensation purposes
• Compensations also for pressure, oxygen, and humidity
• Sensor head heated to prevent condensation Vaisala CARBOCAPâ Carbon Dioxide Probe GMP251 is an intelligent probe for measuring carbon dioxide. This robust, standalone measurement device is designed for use in demanding applications, such as life science incubators, where stable, reliable, and accurate performance is required. Benefits
• Excellent long-term stability
• Reliable and accurate
• Calibration certificate included GMP251 is based on Vaisala’s patented, latest-generation CARBOCAP technology that enables exceptional stability. A new type of infrared (IR) light source is used instead of the traditional incandescent light bulb, which extends the lifetime of GMP251. GMP251 incorporates an internal temperature sensor for compensation of the CO2 measurement according to ambient temperature. The effects of pressure and background gas can also be compensated for. The measurement range is 0 ... 20 %CO2 and the sensor performance is optimized at 5 %CO2 measurement. The operating temperature range of the probe is wide (−40 … +60 °C (−40 ... +140 °F)), and the probe housing is classified as IP65. Condensation is prevented as the internal sensor head is heated. GMP251 is resistant to dust and most chemicals, such as H2O2 and alcohol-based cleaning agents. Ease of use GMP251 is a compact probe with easy and fast plug-in, plug-out installation. The surface of the probe is smooth, which makes it easy to clean. The probe provides several output options, including analog current and voltage outputs and digital RS-485 output with Modbusâ protocol. GMP251 can be connected to Indigo series transmitters and the Indigo80 handheld indicator for an extended range of output and configuration options. See www.vaisala.com/indigo. For easy-to-use access to field calibration, device analytics, and configuration functionality, the probe can be connected to Vaisala Insight software for Windowsâ. See www.vaisala.com/ insight.

Applications

GMP251 is ideal for life science incubators, cold storages, fruit and vegetable transportation, and for all demanding applications where stable and accurate %-level CO2 measurements are needed. A flow-through adapter with gas ports is available as an accessory, enabling tubing for easy and flexible remote measurement with a separate pump. A multiplexer can also be added for sampling gas from several locations. 1) 1) Third-party pump and multiplexer not provided by Vaisala.

Measurement range 0 ... 20 %CO2 Accuracy 1) At 5 %CO2 ±0.1 %CO2 Calibration uncertainty At 5 %CO2 ±0.07 %CO2 At 20 %CO2 ±0.27 %CO2 Long-term stability At 0 ... 8 %CO2 ±0.3 %CO2/year At 8 ... 12 %CO2 ±0.5 %CO2/year at 12 ... 20 %CO2 ±1.0 %CO2/year Temperature dependence With compensation at 5 %CO2, < ±0.05 %CO2 With compensation, 0 … 20 %CO2, ±0.045 % of reading/°C without temperature compensation at 5 %CO2 (typical) -0.25 % of reading/°C Pressure dependence With compensation at 5 %CO2 700 ... 1100 hPa ±0.05 %CO2 With compensation, 0 … 20 %CO2 500 ... 1100 hPa ±0.015 % of reading/hPa Without compensation (typical) +0.15 % of reading/hPa Humidity dependence With compensation, 0 … 20 %CO2, 0 … 100 %RH ±0.7 % of reading (at +25 °C (+77 °F)) Without compensation (typical) +0.05 % of reading / %RH O2 dependence With compensation, 0 … 20 %CO2, 0 ... 90 %O2 ±0.6 % of reading (at +25 °C (+77 °F)) Without compensation (typical) -0.08 % of reading / %O2 Start-up, warm-up, and response time Start-up time at +25 °C (+77 °F) < 10 s Warm-up time for full spec. < 4 min Response time (T90): With standard filter < 1 min Flow-through option with > 0.1 l/min < 1 min With spray shield < 2 min Flow rate dependence (for flow-through option) Flow rate dependence: < 1 l/min flow No effect 1 … 10 l/min flow < 0.6 % of reading/ l/min 1) At 25 °C (77 °F) and 1013 hPa (incl. repeatability and non-linearity). Compliance EU directives and regulations EMC, RoHS EMC compatibility EN 61326‑ 1, basic electromagnetic environment EMC emissions CISPR 32 / EN 55032, Class B Compliance marks CE, RCM Operating environment Operating temperature of CO2 measurement Humidity 0 ... 100 %RH, non-condensing Condensation prevention Sensor head heating, when power on IP rating, probe body IP65 Chemical tolerance (temporary exposure during cleaning)

• H 2O2 (2000 ppm, non- condensing)
• Alcohol-based cleaning agents (for example ethanol and IPA)
• Acetone
• Acetic acid Pressure Compensated 500 ... 1100 hPa Operating < 1.5 bar Gas flow (for flow-through option) Operating range < 10 l/min Recommended range 0.1 … 0.8 l/min 1) Occasional short-term exposure to up to +90 °C (+194 °F) allowed, provided that the probe is fully installed inside the measured condition and power is switched on. Accuracy specification not applicable if used in temperatures above +60 °C (+140 °F). Mechanical specifications Weight, probe 45 g (1.59 oz) Connector type M12 5-pin male Materials Probe housing PBT polymer Filter PTFE membrane, PBT polymer grid Connector Nickel plated brass Dimensions Probe diameter 25 mm (0.98 in) Probe length 96 mm (3.78 in) M12 male connector mm [in] Filter 96 [3.78] [0.47] 75 [2.95] [0.35] Ø 25 [0.98] GMP251 dimensions

Analog outputs • 0 ... 5/10 V (scalable), min. load 10 kΩ 0/4 ... 20 mA (scalable), max. load 500 Ω Digital output Over RS-485: Modbus

• Vaisala Industrial Protocol Operating voltage With digital output in use 12 ... 30 VDC With voltage output in use 12 ... 30 VDC With current output in use 20 ... 30 VDC Power consumption Typical (continuous operation) 0.4 W Maximum 0.5 W Spare parts and accessories Standard membrane filt er ASM211650SP Porous sintered PTFE filt er DRW243649SP Probe connection cable with open wires (1.5 m) 223263SP Probe connection cable with open wires (1.5 m), shielded 254294SP Probe connection cable with open wires (3 m) 26719SP Probe connection cable with open wires (10 m) 216546SP Probe connection cable with open wires and 90° plug (0 .6 m) 244669SP Probe connection cable with open wires and 90° plug (1.5 m) 255102 MI70 connection cable, M12 5-pin CBL210472 Flat cable for GMP250 probes, M12 5-pin CBL210493SP Indigo USB adapter 1) USB2 Probe mounting clips (2 pcs) 243257SP Probe mounting flange 243261SP Probe holder assembly ASM213582 Flow-through adapter with gas ports ASM211697SP Calibration adapter DRW244827SP Spray shield ASM212017SP 1) Vaisala Insight software for Windows available at w ww.vaisala.com/insight mm Ø 4.2 35.4 Probe mounting flange 2 43261SP dimensions mm Ø 4.6 Ø 2 15.9 32.5 Ø 25 Flow-through adapter with gas ports ASM211697SP. Suitable f or tubes with 4 mm inner diameter. 5 17 Ø 36 Ø 60 Ø 25.6 Ø 28.5 Ø 42 mm Probe mounting flange 2 43261SP dimensions, cross section 52 [2.05] Ø 5.9 [0.23] 4 mm hex 57 [2.24] 38 [1.50] mm [in] 25 [0.98] Probe holder ASM213582 dimensions Published by Vaisala | B211487EN-L © Vaisala 2023 www.vaisala.com All rights reserved. Any logos and/or product names are trademarks of Vaisala or its individual partners. Any reproduction, transfer, distribution or storage of information contained in this document is strictly prohibited. All specifications — technical included — are subject to change without notice.