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Humidity >
Arh2 Series

A/RH2 Series

ACI 2% Wall, Duct and OSA Humidity Transmitters

The ACI A/RH2 Series Relative Humidity Transmitters utilize a capacitive humidity sensor element to deliver a proportional 4 to 20 mA, 0 to 5 volt DC, or 0 to 10 volt DC output. Each relative humidity transmitter can monitor room and duct humidity as well as outside moisture. The transmitters are compatible with stainless steel wall plate applications and are designed for use in Building Automation Systems, BAS, and HVAC applications. The A/RH2 Series has on board DIP switches. These allow the user to select the desired output signal and can be powered by AC or DC power sources. Each A/RH2 Series humidity transmitter is calibrated using a NIST Traceable Temperature/Humidity Chamber. Three and five point NIST calibration certificates are available.

Products

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Qty	Model	Description	In Stock	List Price	Internet Price
	A/RH2-100-D	2% DUCT RH XMTR W/TEMP SENSOR 100 OHM RTD	INFO	361.67	180.84
	A/RH2-100-O	2% OUTSIDE AIR RH XMTR W/TEMP SENSOR 100 OHM RTD	INFO	370.74	185.37
	A/RH2-100-R	2% WALL MOUNT RH XMTR W/TEMP SENSOR 100 OHM RTD	INFO	350.21	175.10
	A/RH2-100-RO	2% WALL MOUNT RH XMTR W/TEMP 100 OHM RTD OVR	INFO	360.97	180.49
	A/RH2-100KS-D	2% DUCT RH XMTR W/TEMP SENSOR 100K OHM THMS	INFO	361.67	180.84
	A/RH2-100KS-O	2% OUTSIDE AIR RH XMTR W/TEMP SENSOR 100K OHM THMS	INFO	352.78	176.39
	A/RH2-100KS-R	2% WALL RH XMTR W/TEMP SENSOR 100K OHM THMS	INFO	350.21	175.10
	A/RH2-100KS-RO	2% WALL RH XMTR W/TEMP 100K OHM THMS OVR	INFO	360.97	180.49
	A/RH2-1K-D	2% DUCT RH XMTR W/TEMP SENSOR 1K OHM RTD 383		361.67	180.84
	A/RH2-1K-O	2% OUTSIDE AIR RH XMTR W/TEMP SNSR 1K OHM RTD 383	INFO	352.78	176.39
	A/RH2-1K-R	2% WALL MOUNT RH XMTR W/TEMP SENSOR 1K OHM RTD 383		350.21	175.10
	A/RH2-1K-RO	2% WALL MOUNT RH XMTR W/TEMP 1K OHM RTD 383 OPVR	INFO	360.97	180.49
	A/RH2-20K-D	2% DUCT RH XMTR W/TEMP SENSOR 20K OHM THMS	INFO	361.67	180.84
	A/RH2-20K-O	2% OUTSIDE AIR RH XMTR W/TEMP SNSR 20K OHM THMS		352.78	176.39
	A/RH2-20K-R	2% WALL MOUNT RH XMTR W/TEMP SENSOR 20K OHM THMS	INFO	350.21	175.10
	A/RH2-20K-RO	2% WALL MOUNT RH XMTR W/TEMP 20K OHM THMS OVR	INFO	360.97	180.49
	A/RH2-AN-D	2% DUCT RH XMTR W/TEMP SENSOR 10K OHM 3 THMS		361.68	180.84
	A/RH2-AN-O	2% OUTSIDE AIR RH XMTR W/TEMP SNSR 10K OHM 3 THMS		352.78	176.39
	A/RH2-AN-R	2% WALL MOUNT RH XMTR W/TEMP SENSOR 10K OHM 3 THMS		350.21	175.10
	A/RH2-AN-RO	2% WALL MOUNT RH XMTR W/TEMP 10K OHM 3 THMS OVR	INFO	360.97	180.49
	A/RH2-CP-D	2% DUCT RH XMTR W/TEMP SENSOR 10K OHM 2 THMS		361.67	180.84
	A/RH2-CP-O	2% OUTSIDE AIR RH XMTR W/TEMP SNSR 10K OHM 2 THMS		352.78	176.39
	A/RH2-CP-R	2% WALL MOUNT RH XMTR W/TEMP SENSOR 10K OHM 2 THMS		350.21	175.10
	A/RH2-CP-RO	2% WALL MOUNT RH XMTR W/TEMP 10K OHM 2 THMS OVR	INFO	360.97	180.49
	A/RH2-D	2% DUCT RH XMTR		345.05	172.52
	A/RH2-D-3PTNIST	2% DUCT HUMIDITY SENSOR 3 POINT NIST	INFO	416.15	208.08
	A/RH2-D-5PTNIST	2% DUCT HUMIDITY SENSOR 5 POINT NIST		471.98	235.99
	A/RH2-O	2% OUTSIDE AIR RH XMTR		336.56	168.28
	A/RH2-R	2% WALL MOUNT RH XMTR		333.11	166.56
	A/RH20SUN	2% OUTSIDE AIR RH XMTR	INFO	627.55	313.78
	A/RH21000SUN	2% OUTSIDE AIR RH XMTR 100 RTD	INFO	637.21	318.60
	A/RH2100D1010	2% DUCT RH XMTR W/TMP SNSR 100 OHM RTD 0/10V	INFO	370.19	185.10
	A/RH2100D5	2% DUCT RH XMTR W/TMP SNSR 100 OHM RTD 0/5V	INFO	356.33	178.16
	A/RH2100KS0SUN	2% OUTSIDE AIR RH XMTR 100K THMS	INFO	637.21	318.60
	A/RH2100KSD1010	2% DUCT RH XMTR W/TMP SNSR 100K OHM THMS 0/10V	INFO	370.19	185.10
	A/RH2100KSD5	2% DUCT RH XMTR W/TMP SNSR 100K OHM THMS 0/5V	INFO	356.33	178.16
	A/RH2100KSO1010	2% OSA RH XMTR W/TMP SNSR 100K OHM THMS 0/10V	INFO	370.74	185.37
	A/RH2100KSO5	2% OSA RH XMTR W/TMP SNSR 100K OHM THMS 0/5V	INFO	370.74	185.37
	A/RH2100KSP1010	2% WALL PLT RH XMTR W/TMP SNSR 100K OHM THMS 0/10V	INFO	381.13	190.57
	A/RH2100KSR10	2% WALL RH XMTR W/TMP SNSR 100K OHM THMS 0/10V	INFO	357.31	178.66
	A/RH2100KSR210	2% WALL RH XMTR W/TMP SNSR 100K OHM THMS 0/10V	INFO	357.31	178.66
	A/RH2100KSR25	2% WALL RH XMTR W/TMP SNSR 100K OHM THMS 0/5V	INFO	357.31	178.66
	A/RH2100KSR5	2% WALL RH XMTR W/TMP SNSR 100K OHM THMS 0/5V	INFO	357.31	178.66
	A/RH2100KSSP5	2% WALL PLT RH XMTR W/TMP SNSR 100K OHM THMS 0/5V	INFO	381.13	190.57
	A/RH2100O1010	2% OSA RH XMTR W/TMP SNSR 100 OHM RTD 0/10V	INFO	370.74	185.37
	A/RH2100O55	2% OSA RH XMTR W/TMP SNSR 100 OHM RTD 0/5V	INFO	347.57	173.78
	A/RH2100R10	2% WALL RH XMTR W/TMP SNSR 100 OHM RTD 0/10V	INFO	357.31	178.66
	A/RH2100R210	2% WALL RH XMTR W/TMP SNSR 100 OHM RTD 0/10V	INFO	357.31	178.66
	A/RH2100R25	2% WALL RH XMTR W/TMP SNSR 100 OHM RTD 0/5V	INFO	357.31	178.66
	A/RH2100R5	2% WALL RH XMTR W/TMP SNSR 100 OHM RTD 0/5V	INFO	357.31	178.66
	A/RH2100SP1010	2% WALL PLT RH XMTR W/TMP SNSR 100 OHM RTD 0/10V	INFO	381.13	190.57
	A/RH2100SP5	2% WALL PLT RH XMTR W/TMP SNSR 100 OHM RTD 0/5V	INFO	381.13	190.57
	A/RH21K0SUN	2% OUTSIDE AIR RH XMTR 1K RTD	INFO	637.21	318.60
	A/RH21K2WRP10	REMOTE RH 2% 10FT CABLE 4/20MA OUT TEMP 1K RTD	INFO	607.74	303.87
	A/RH21K2WRP1010	REMOTE RH 2% 10FT CABLE 0/10V OUT TEMP 1K RTD	INFO	607.74	303.87
	A/RH21K2WRP105	REMOTE RH 2% 10FT CABLE 0/5V OUT TEMP 1K RTD	INFO	607.74	303.87
	A/RH21K2WRP20	REMOTE RH 2% 20FT CABLE 4/20MA OUT TEMP 1K RTD	INFO	740.37	370.19
	A/RH21K2WRP2010	REMOTE RH 2% 20FT CABLE 0/10V OUT TEMP 1K RTD	INFO	740.37	370.19
	A/RH21K2WRP205	REMOTE RH 2% 20FT CABLE 0/5V OUT TEMP 1K RTD	INFO	740.37	370.19
	A/RH21K2WRP3	REMOTE RH 2% 3FT CABLE 4/20MA OUT TEMP 1K RTD	INFO	502.81	251.41
	A/RH21K2WRP310	REMOTE RH 2% 3FT CABLE 0/10V OUT TEMP 1K RTD	INFO	502.81	251.41
	A/RH21K2WRP35	REMOTE RH 2% 3FT CABLE 0/5V OUT TEMP 1K RTD	INFO	502.81	251.41
	A/RH21K2WRP6	REMOTE RH 2% 6FT CABLE 4/20MA OUT TEMP 1K RTD	INFO	552.31	276.16
	A/RH21K2WRP610	REMOTE RH 2% 6FT CABLE 0/10V OUT TEMP 1K RTD	INFO	552.31	276.16
	A/RH21K2WRP65	REMOTE RH 2% 6FT CABLE 0/5V OUT TEMP 1K RTD	INFO	552.31	276.16
	A/RH21KD1010	2% DUCT RH XMTR W/TMP SNSR 1K OHM RTD 0/10V 385	INFO	370.19	185.10
	A/RH21KD5	2% DUCT RH XMTR 0/5V W/TMP SNSR 1K OHM RTD 385	INFO	370.19	185.10
	A/RH21KO1010	2% OSA RH XMTR W/TMP SNSR 1K OHM RTD 0/10V 385	INFO	370.74	185.37
	A/RH21KO5	2% OSA RH XMTR 0/5V W/TMP SNSR 1K OHM RTD 385	INFO	370.74	185.37
	A/RH21KR10	2% WALL RH XMTR W/TMP SNSR 1K OHM RTD 0/10V 385	INFO	357.31	178.66
	A/RH21KR210	2% WALL RH XMTR W/TMP SNSR 1K OHM RTD 0/10V 385	INFO	357.31	178.66
	A/RH21KR25	2% WALL RH XMTR 0/5V W/TMP SNSR 1K OHM RTD 385	INFO	357.31	178.66
	A/RH21KR5	2% WALL RH XMTR 0/5V W/TMP SNSR 1K OHM RTD 385	INFO	357.31	178.66
	A/RH21KSP1010	2% WALL PLT RH XMT W/TMP SNSR 1K OHM RTD 0/10V 385	INFO	381.13	190.57
	A/RH21KSP5	2% WALL PLT RH XMTR 0/5V W/TMP SNR 1K OHM RTD 385	INFO	381.13	190.57
	A/RH220K0SUN	2% OUTSIDE AIR RH XMTR 20K THMS	INFO	637.21	318.60
	A/RH220KD10	2% DUCT RH XMTR W/TMP SNSR 20K OHM THMS 0/10V	INFO	370.19	185.10
	A/RH220KD5	2% DUCT RH XMTR W/TMP SNSR 20K OHM THMS 0/5V	INFO	370.19	185.10
	A/RH220KO10	2% OSA RH XMTR W/TMP SNSR 20K OHM THMS 0/10V	INFO	370.74	185.37
	A/RH220KO5	2% OSA RH XMTR W/TMP SNSR 20K OHM THMS 0/5V	INFO	370.74	185.37
	A/RH220KR10	2% WALL RH XMTR W/TMP SNSR 20K OHM THMS 0/10V	INFO	357.31	178.66
	A/RH220KR210	2% WALL RH XMTR W/TMP SNSR 20K OHM THMS 0/10V	INFO	357.31	178.66
	A/RH220KR25	2% WALL RH XMTR W/TMP SNSR 20K OHM THMS 0/5V	INFO	357.31	178.66
	A/RH220KR5	2% WALL RH XMTR W/TMP SNSR 20K OHM THMS 0/5V	INFO	357.31	178.66
	A/RH220KSP10	2% WALL PLT RH XMTR W/TMP SNSR 20K OHM THMS 0/10V	INFO	381.13	190.57
	A/RH220KSP5	2% WALL PLT RH XMTR W/TMP SNSR 20K OHM THMS 0/5V	INFO	381.13	190.57
	A/RH23K0SUN	2% OUTSIDE AIR RH XMTR 3K THMS	INFO	637.21	318.60
	A/RH23KD	2% DUCT RH XMTR W/TMP 3K THMS	INFO	361.67	180.84
	A/RH23KD10	2% DUCT RH XMTR W/TMP 3K THMS 0/10V	INFO	345.05	172.52
	A/RH23KD5	2% DUCT RH XMTR W/TMP 3K THMS 0/5V	INFO	370.19	185.10
	A/RH23KO	2% OSA RH XMTR W/TMP 3K THMS	INFO	352.78	176.39
	A/RH23KO10	2% OSA RH XMTR W/TMP 3K THMS 0/10V	INFO	336.56	168.28
	A/RH23KO5	2% OSA RH XMTR W/TMP 3K THMS 0/5V	INFO	370.74	185.37
	A/RH23KR	2% WALL RH XMTR W/TMP 3K THMS	INFO	341.81	170.91
	A/RH23KR10	2% WALL RH XMTR W/TMP 3K THMS 0/10V	INFO	325.13	162.57
	A/RH23KR2	2% WALL RH XMTR W/TMP 3K THMS	INFO	341.81	170.91
	A/RH23KR210	2% WALL RH XMTR W/TMP 3K THMS 0/10V	INFO	325.13	162.57
	A/RH23KR25	2% WALL RH XMTR W/TMP 3K THMS 0/5V	INFO	357.31	178.66
	A/RH23KR5	2% WALL RH XMTR W/TMP 3K THMS 0/5V	INFO	357.31	178.66
	A/RH23KSP	2% SS PLT RH XMTR W/TMP 3K THMS	INFO	396.01	198.01
	A/RH23KSP10	2% SS PLT RH XMTR W/TMP 3K THMS 0/10V	INFO	367.22	183.61
	A/RH23KSP5	2% SS PLT RH XMTR W/TMP 3K THMS 0/5V	INFO	381.13	190.57
	A/RH2AN0SUN	2% OUTSIDE AIR RH XMTR 10K 3 THMS	INFO	637.21	318.60
	A/RH2AND10	2% DUCT RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/10V	INFO	370.19	185.10
	A/RH2AND5	2% DUCT RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/5V	INFO	370.19	185.10
	A/RH2ANO10	2% OSA RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/10V	INFO	370.74	185.37
	A/RH2ANO5	2% OSA RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/5V	INFO	370.74	185.37
	A/RH2ANR10	2% WALL RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/10V	INFO	357.31	178.66
	A/RH2ANR210	2% WALL RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/10V	INFO	357.31	178.66
	A/RH2ANR25	2% WALL RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/5V	INFO	357.31	178.66
	A/RH2ANR5	2% WALL RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/5V	INFO	357.31	178.66
	A/RH2ANSP10	2% WALL PLT RH XMT W/TMP SNSR 10K OHM 3 THMS 0/10V	INFO	381.13	190.57
	A/RH2ANSP5	2% WALL PLT RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/5V	INFO	381.13	190.57
	A/RH2CP0SUN	2% OUTSIDE AIR RH XMTR 10K 2 THMS	INFO	637.21	318.60
	A/RH2CPD10	2% DUCT RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/10V	INFO	370.19	185.10
	A/RH2CPD5	2% DUCT RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/5V	INFO	370.19	185.10
	A/RH2CPO10	2% OSA RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/10V	INFO	370.74	185.37
	A/RH2CPO5	2% OSA RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/5V	INFO	370.74	185.37
	A/RH2CPR10	2% WALL RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/10V	INFO	357.31	178.66
	A/RH2CPR210	2% WALL RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/10V	INFO	357.31	178.66
	A/RH2CPR25	2% WALL RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/5V	INFO	357.31	178.66
	A/RH2CPR5	2% WALL RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/5V	INFO	357.31	178.66
	A/RH2CPSP10	2% WALL PLT RH XMT W/TMP SNSR 10K OHM 2 THMS 0/10V	INFO	381.13	190.57
	A/RH2CPSP5	2% WALL PLT RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/5V	INFO	381.13	190.57
	A/RH2D10	2% DUCT RH XMTR 0/10V	INFO	357.00	178.50
	A/RH2D5	2% DUCT RH XMTR 0/5V	INFO	345.05	172.52
	A/RH2O10	2% OSA RH XMTR 0/10V	INFO	336.56	168.28
	A/RH2O5	2% OSA RH XMTR 0/5V	INFO	336.56	168.28
	A/RH2R10	2% WALL RH XMTR 0/10V	INFO	325.13	162.57
	A/RH2R2	2% WALL RH XMTR 4/20 MA		325.13	162.57
	A/RH2R210	2% WALL RH XMTR 0/10V	INFO	325.13	162.57
	A/RH2R25	2% WALL RH XMTR 0/5V	INFO	325.13	162.57
	A/RH2R5	2% WALL RH XMTR 0/5V	INFO	325.13	162.57
	A/RH2RP10	REMOTE RH 2% 10FT CABLE 4/20MA OUT	INFO	598.84	299.42
	A/RH2RP1010	REMOTE RH 2% 10FT CABLE 0/10V OUT	INFO	598.84	299.42
	A/RH2RP105	REMOTE RH 2% 10FT CABLE 0/5V OUT	INFO	598.84	299.42
	A/RH2RP20	REMOTE RH 2% 20FT CABLE 4/20MA OUT	INFO	732.45	366.23
	A/RH2RP2010	REMOTE RH 2% 20FT CABLE 0/10V OUT	INFO	732.45	366.23
	A/RH2RP205	REMOTE RH 2% 20FT CABLE 0/5V OUT	INFO	732.45	366.23
	A/RH2RP3	REMOTE RH 2% 3FT CABLE 4/20MA OUT	INFO	494.90	247.45
	A/RH2RP310	REMOTE RH 2% 3FT CABLE 0/10V OUT	INFO	494.90	247.45
	A/RH2RP35	REMOTE RH 2% 3FT CABLE 0/5V OUT	INFO	494.90	247.45
	A/RH2RP6	REMOTE RH 2% 6FT CABLE 4/20MA OUT	INFO	544.39	272.19
	A/RH2RP610	REMOTE RH 2% 6FT CABLE 0/10V OUT	INFO	544.39	272.19
	A/RH2RP65	REMOTE RH 2% 6FT CABLE 0/5V OUT	INFO	544.39	272.19
	A/RH2SP10	2% WALL PLT RH XMTR 0/10V	INFO	381.11	190.56
	A/RH2SP5	2% WALL PLT RH XMTR 0/5V	INFO	381.11	190.56
	A/RH2TT1000SUN	2% OUTSIDE AIR RH XMTR TEMP XMTR 100 RTD -40/160F	INFO	666.17	333.09
	A/RH2TT1K0SUN	2% OUTSIDE AIR RH XMTR TEMP XMTR 1K RTD -40/160F	INFO	666.17	333.09
	A/RH2-R-LCDR	2%SPACE DSPLY		439.29	219.65

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Accessories

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Features

Popular room housing

Five-year warranty

Duct and OSA twist-off NEMA 4 housing

24 VDC or 24 VAC power

Field selectable current or voltage outputs

Single point field calibration

Optional temperature sensor

Specifications

Accuracy: ±2% @ 77°F (25°C) from 10% to 95%

Stability:±2% RH/5 years

Supply Voltage:12-40 VDC or 18-28 VAC

Signal Output:4-20 mA @ 300Ω, 0-5/10 VDC @ 4kΩ min, (field selectable) except SP 0-5/10 VDC only

Measurement Range:0% to 100%

Sensing Technology:Capacitive

Operating Temperature:

Room:32° to 122°F (0° to 50°C)

Duct/OSA:-40° to 140°F (-40° to 60°C)

Enclosure:

Room:Plastic Delta-style

Duct/OSA:Plastic weatherproof

Dimensions:

Room:3.8"H x 2.8"W x 0.9"D (9.8 x 7 x 2.3 cm)

Duct:3.6" (9 cm) Ø head with 8.15"L (20 cm) probe 0.75" (1.9 cm) Ø

OSA:3.6" (9 cm) Ø head with 3.0"L (7.6 cm) probe 1.4" (3.6 cm) Ø

Weight:

Room: 0.22 lb (0.1 Kg)

Duct :1.2 lb (0.54 Kg)

OSA: 0.6 lb (0.27 Kg)

SP :0.2 lb (0.09 Kg)

Approvals: CE, RoHS

Warranty: 5 years

Certifications

Download Additional Data

A_RH2 Series Catalog Page

ACI RH Duct and OSA Series Installation and Operation Instructions

A/RH2 Series

A/RH2 Series

ACI 2% Wall, Duct and OSA Humidity Transmitters

Accessories

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