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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	365.29	182.65
	A/RH2-100-O	2% OUTSIDE AIR RH XMTR W/TEMP SENSOR 100 OHM RTD	INFO	374.45	187.22
	A/RH2-100-R	2% WALL MOUNT RH XMTR W/TEMP SENSOR 100 OHM RTD	INFO	353.71	176.85
	A/RH2-100-RO	2% WALL MOUNT RH XMTR W/TEMP 100 OHM RTD OVR	INFO	364.58	182.29
	A/RH2-100KS-D	2% DUCT RH XMTR W/TEMP SENSOR 100K OHM THMS	INFO	308.05	154.03
	A/RH2-100KS-O	2% OUTSIDE AIR RH XMTR W/TEMP SENSOR 100K OHM THMS	INFO	317.14	158.57
	A/RH2-100KS-R	2% WALL RH XMTR W/TEMP SENSOR 100K OHM THMS	INFO	305.02	152.51
	A/RH2-100KS-RO	2% WALL RH XMTR W/TEMP 100K OHM THMS OVR	INFO	364.58	182.29
	A/RH2-1K-D	2% DUCT RH XMTR W/TEMP SENSOR 1K OHM RTD 383		308.05	154.03
	A/RH2-1K-O	2% OUTSIDE AIR RH XMTR W/TEMP SNSR 1K OHM RTD 383	INFO	301.99	151.00
	A/RH2-1K-R	2% WALL MOUNT RH XMTR W/TEMP SENSOR 1K OHM RTD 383		353.71	176.85
	A/RH2-1K-RO	2% WALL MOUNT RH XMTR W/TEMP 1K OHM RTD 383 OPVR	INFO	364.58	182.29
	A/RH2-20K-D	2% DUCT RH XMTR W/TEMP SENSOR 20K OHM THMS	INFO	308.05	154.03
	A/RH2-20K-O	2% OUTSIDE AIR RH XMTR W/TEMP SNSR 20K OHM THMS	INFO	301.99	151.00
	A/RH2-20K-R	2% WALL MOUNT RH XMTR W/TEMP SENSOR 20K OHM THMS	INFO	305.02	152.51
	A/RH2-20K-RO	2% WALL MOUNT RH XMTR W/TEMP 20K OHM THMS OVR	INFO	364.58	182.29
	A/RH2-20K-SP	2% WALL PLATE RH XMTR W/TEMP SENSOR 20K OHM THMS	INFO	444.00	222.00
	A/RH2-AN-D	2% DUCT RH XMTR W/TEMP SENSOR 10K OHM 3 THMS		308.05	154.03
	A/RH2-AN-O	2% OUTSIDE AIR RH XMTR W/TEMP SNSR 10K OHM 3 THMS		301.99	151.00
	A/RH2-AN-R	2% WALL MOUNT RH XMTR W/TEMP SENSOR 10K OHM 3 THMS	INFO	305.02	152.51
	A/RH2-AN-RO	2% WALL MOUNT RH XMTR W/TEMP 10K OHM 3 THMS OVR	INFO	316.13	158.07
	A/RH2-CP-D	2% DUCT RH XMTR W/TEMP SENSOR 10K OHM 2 THMS	INFO	308.05	154.03
	A/RH2-CP-O	2% OUTSIDE AIR RH XMTR W/TEMP SNSR 10K OHM 2 THMS		301.99	151.00
	A/RH2-CP-R	2% WALL MOUNT RH XMTR W/TEMP SENSOR 10K OHM 2 THMS		305.02	152.51
	A/RH2-CP-RO	2% WALL MOUNT RH XMTR W/TEMP 10K OHM 2 THMS OVR	INFO	316.13	158.07
	A/RH2-D	2% DUCT RH XMTR		295.93	147.97
	A/RH2-D-3PTNIST	2% DUCT HUMIDITY SENSOR 3 POINT NIST	INFO	421.00	210.50
	A/RH2-D-5PTNIST	2% DUCT HUMIDITY SENSOR 5 POINT NIST		477.00	238.50
	A/RH2-O	2% OUTSIDE AIR RH XMTR		289.87	144.94
	A/RH2-R	2% WALL MOUNT RH XMTR		288.86	144.43
	A/RH2-SP	2% WALL PLATE RH XMTR	INFO	420.00	210.00
	A/RH20SUN	2% OUTSIDE AIR RH XMTR	INFO	633.83	316.91
	A/RH21000SUN	2% OUTSIDE AIR RH XMTR 100 RTD	INFO	643.58	321.79
	A/RH2100D1010	2% DUCT RH XMTR W/TMP SNSR 100 OHM RTD 0/10V	INFO	373.89	186.95
	A/RH2100D5	2% DUCT RH XMTR W/TMP SNSR 100 OHM RTD 0/5V	INFO	359.89	179.94
	A/RH2100KS0SUN	2% OUTSIDE AIR RH XMTR 100K THMS	INFO	643.58	321.79
	A/RH2100KSD1010	2% DUCT RH XMTR W/TMP SNSR 100K OHM THMS 0/10V	INFO	373.89	186.95
	A/RH2100KSD5	2% DUCT RH XMTR W/TMP SNSR 100K OHM THMS 0/5V	INFO	359.89	179.94
	A/RH2100KSO1010	2% OSA RH XMTR W/TMP SNSR 100K OHM THMS 0/10V	INFO	374.45	187.22
	A/RH2100KSO5	2% OSA RH XMTR W/TMP SNSR 100K OHM THMS 0/5V	INFO	374.45	187.22
	A/RH2100KSP1010	2% WALL PLT RH XMTR W/TMP SNSR 100K OHM THMS 0/10V	INFO	384.94	192.47
	A/RH2100KSR10	2% WALL RH XMTR W/TMP SNSR 100K OHM THMS 0/10V	INFO	360.88	180.44
	A/RH2100KSR210	2% WALL RH XMTR W/TMP SNSR 100K OHM THMS 0/10V	INFO	360.88	180.44
	A/RH2100KSR25	2% WALL RH XMTR W/TMP SNSR 100K OHM THMS 0/5V	INFO	360.88	180.44
	A/RH2100KSR5	2% WALL RH XMTR W/TMP SNSR 100K OHM THMS 0/5V	INFO	360.88	180.44
	A/RH2100KSSP5	2% WALL PLT RH XMTR W/TMP SNSR 100K OHM THMS 0/5V	INFO	384.94	192.47
	A/RH2100O1010	2% OSA RH XMTR W/TMP SNSR 100 OHM RTD 0/10V	INFO	374.45	187.22
	A/RH2100O55	2% OSA RH XMTR W/TMP SNSR 100 OHM RTD 0/5V	INFO	351.04	175.52
	A/RH2100R10	2% WALL RH XMTR W/TMP SNSR 100 OHM RTD 0/10V	INFO	360.88	180.44
	A/RH2100R210	2% WALL RH XMTR W/TMP SNSR 100 OHM RTD 0/10V	INFO	360.88	180.44
	A/RH2100R25	2% WALL RH XMTR W/TMP SNSR 100 OHM RTD 0/5V	INFO	360.88	180.44
	A/RH2100R5	2% WALL RH XMTR W/TMP SNSR 100 OHM RTD 0/5V	INFO	360.88	180.44
	A/RH2100SP1010	2% WALL PLT RH XMTR W/TMP SNSR 100 OHM RTD 0/10V	INFO	384.94	192.47
	A/RH2100SP5	2% WALL PLT RH XMTR W/TMP SNSR 100 OHM RTD 0/5V	INFO	384.94	192.47
	A/RH21K0SUN	2% OUTSIDE AIR RH XMTR 1K RTD	INFO	643.58	321.79
	A/RH21K2WRP10	REMOTE RH 2% 10FT CABLE 4/20MA OUT TEMP 1K RTD	INFO	613.82	306.91
	A/RH21K2WRP1010	REMOTE RH 2% 10FT CABLE 0/10V OUT TEMP 1K RTD	INFO	613.82	306.91
	A/RH21K2WRP105	REMOTE RH 2% 10FT CABLE 0/5V OUT TEMP 1K RTD	INFO	613.82	306.91
	A/RH21K2WRP20	REMOTE RH 2% 20FT CABLE 4/20MA OUT TEMP 1K RTD	INFO	747.78	373.89
	A/RH21K2WRP2010	REMOTE RH 2% 20FT CABLE 0/10V OUT TEMP 1K RTD	INFO	747.78	373.89
	A/RH21K2WRP205	REMOTE RH 2% 20FT CABLE 0/5V OUT TEMP 1K RTD	INFO	747.78	373.89
	A/RH21K2WRP3	REMOTE RH 2% 3FT CABLE 4/20MA OUT TEMP 1K RTD	INFO	507.84	253.92
	A/RH21K2WRP310	REMOTE RH 2% 3FT CABLE 0/10V OUT TEMP 1K RTD	INFO	507.84	253.92
	A/RH21K2WRP35	REMOTE RH 2% 3FT CABLE 0/5V OUT TEMP 1K RTD	INFO	507.84	253.92
	A/RH21K2WRP6	REMOTE RH 2% 6FT CABLE 4/20MA OUT TEMP 1K RTD	INFO	557.84	278.92
	A/RH21K2WRP610	REMOTE RH 2% 6FT CABLE 0/10V OUT TEMP 1K RTD	INFO	557.84	278.92
	A/RH21K2WRP65	REMOTE RH 2% 6FT CABLE 0/5V OUT TEMP 1K RTD	INFO	557.84	278.92
	A/RH21KD1010	2% DUCT RH XMTR W/TMP SNSR 1K OHM RTD 0/10V 385	INFO	373.89	186.95
	A/RH21KD5	2% DUCT RH XMTR 0/5V W/TMP SNSR 1K OHM RTD 385	INFO	373.89	186.95
	A/RH21KO1010	2% OSA RH XMTR W/TMP SNSR 1K OHM RTD 0/10V 385	INFO	374.45	187.22
	A/RH21KO5	2% OSA RH XMTR 0/5V W/TMP SNSR 1K OHM RTD 385	INFO	374.45	187.22
	A/RH21KR10	2% WALL RH XMTR W/TMP SNSR 1K OHM RTD 0/10V 385	INFO	360.88	180.44
	A/RH21KR210	2% WALL RH XMTR W/TMP SNSR 1K OHM RTD 0/10V 385	INFO	360.88	180.44
	A/RH21KR25	2% WALL RH XMTR 0/5V W/TMP SNSR 1K OHM RTD 385	INFO	360.88	180.44
	A/RH21KR5	2% WALL RH XMTR 0/5V W/TMP SNSR 1K OHM RTD 385	INFO	360.88	180.44
	A/RH21KSP1010	2% WALL PLT RH XMT W/TMP SNSR 1K OHM RTD 0/10V 385	INFO	384.94	192.47
	A/RH21KSP5	2% WALL PLT RH XMTR 0/5V W/TMP SNR 1K OHM RTD 385	INFO	384.94	192.47
	A/RH220K0SUN	2% OUTSIDE AIR RH XMTR 20K THMS	INFO	643.58	321.79
	A/RH220KD10	2% DUCT RH XMTR W/TMP SNSR 20K OHM THMS 0/10V	INFO	373.89	186.95
	A/RH220KD5	2% DUCT RH XMTR W/TMP SNSR 20K OHM THMS 0/5V	INFO	373.89	186.95
	A/RH220KO10	2% OSA RH XMTR W/TMP SNSR 20K OHM THMS 0/10V	INFO	374.45	187.22
	A/RH220KO5	2% OSA RH XMTR W/TMP SNSR 20K OHM THMS 0/5V	INFO	374.45	187.22
	A/RH220KR10	2% WALL RH XMTR W/TMP SNSR 20K OHM THMS 0/10V	INFO	360.88	180.44
	A/RH220KR210	2% WALL RH XMTR W/TMP SNSR 20K OHM THMS 0/10V	INFO	360.88	180.44
	A/RH220KR25	2% WALL RH XMTR W/TMP SNSR 20K OHM THMS 0/5V	INFO	360.88	180.44
	A/RH220KR5	2% WALL RH XMTR W/TMP SNSR 20K OHM THMS 0/5V	INFO	360.88	180.44
	A/RH220KSP10	2% WALL PLT RH XMTR W/TMP SNSR 20K OHM THMS 0/10V	INFO	384.94	192.47
	A/RH220KSP5	2% WALL PLT RH XMTR W/TMP SNSR 20K OHM THMS 0/5V	INFO	384.94	192.47
	A/RH23K0SUN	2% OUTSIDE AIR RH XMTR 3K THMS	INFO	643.58	321.79
	A/RH23KD	2% DUCT RH XMTR W/TMP 3K THMS	INFO	365.29	182.65
	A/RH23KD10	2% DUCT RH XMTR W/TMP 3K THMS 0/10V	INFO	348.50	174.25
	A/RH23KD5	2% DUCT RH XMTR W/TMP 3K THMS 0/5V	INFO	373.89	186.95
	A/RH23KO	2% OSA RH XMTR W/TMP 3K THMS	INFO	301.99	151.00
	A/RH23KO10	2% OSA RH XMTR W/TMP 3K THMS 0/10V	INFO	339.93	169.96
	A/RH23KO5	2% OSA RH XMTR W/TMP 3K THMS 0/5V	INFO	374.45	187.22
	A/RH23KR	2% WALL RH XMTR W/TMP 3K THMS	INFO	297.95	148.98
	A/RH23KR10	2% WALL RH XMTR W/TMP 3K THMS 0/10V	INFO	328.39	164.19
	A/RH23KR2	2% WALL RH XMTR W/TMP 3K THMS	INFO	297.95	148.98
	A/RH23KR210	2% WALL RH XMTR W/TMP 3K THMS 0/10V	INFO	328.39	164.19
	A/RH23KR25	2% WALL RH XMTR W/TMP 3K THMS 0/5V	INFO	360.88	180.44
	A/RH23KR5	2% WALL RH XMTR W/TMP 3K THMS 0/5V	INFO	360.88	180.44
	A/RH23KSP	2% SS PLT RH XMTR W/TMP 3K THMS	INFO	399.97	199.99
	A/RH23KSP10	2% SS PLT RH XMTR W/TMP 3K THMS 0/10V	INFO	370.89	185.44
	A/RH23KSP5	2% SS PLT RH XMTR W/TMP 3K THMS 0/5V	INFO	384.94	192.47
	A/RH2AN0SUN	2% OUTSIDE AIR RH XMTR 10K 3 THMS	INFO	643.58	321.79
	A/RH2AND10	2% DUCT RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/10V	INFO	373.89	186.95
	A/RH2AND5	2% DUCT RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/5V	INFO	373.89	186.95
	A/RH2ANO10	2% OSA RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/10V	INFO	374.45	187.22
	A/RH2ANO5	2% OSA RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/5V	INFO	374.45	187.22
	A/RH2ANR10	2% WALL RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/10V	INFO	360.88	180.44
	A/RH2ANR210	2% WALL RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/10V	INFO	360.88	180.44
	A/RH2ANR25	2% WALL RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/5V	INFO	360.88	180.44
	A/RH2ANR5	2% WALL RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/5V	INFO	360.88	180.44
	A/RH2ANSP10	2% WALL PLT RH XMT W/TMP SNSR 10K OHM 3 THMS 0/10V	INFO	384.94	192.47
	A/RH2ANSP5	2% WALL PLT RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/5V	INFO	384.94	192.47
	A/RH2CP0SUN	2% OUTSIDE AIR RH XMTR 10K 2 THMS	INFO	643.58	321.79
	A/RH2CPD10	2% DUCT RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/10V	INFO	373.89	186.95
	A/RH2CPD5	2% DUCT RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/5V	INFO	373.89	186.95
	A/RH2CPO10	2% OSA RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/10V	INFO	374.45	187.22
	A/RH2CPO5	2% OSA RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/5V	INFO	374.45	187.22
	A/RH2CPR10	2% WALL RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/10V	INFO	360.88	180.44
	A/RH2CPR210	2% WALL RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/10V	INFO	360.88	180.44
	A/RH2CPR25	2% WALL RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/5V	INFO	360.88	180.44
	A/RH2CPR5	2% WALL RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/5V	INFO	360.88	180.44
	A/RH2CPSP10	2% WALL PLT RH XMT W/TMP SNSR 10K OHM 2 THMS 0/10V	INFO	384.94	192.47
	A/RH2CPSP5	2% WALL PLT RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/5V	INFO	384.94	192.47
	A/RH2D10	2% DUCT RH XMTR 0/10V	INFO	360.57	180.29
	A/RH2D5	2% DUCT RH XMTR 0/5V	INFO	348.50	174.25
	A/RH2O10	2% OSA RH XMTR 0/10V	INFO	339.93	169.96
	A/RH2O5	2% OSA RH XMTR 0/5V	INFO	339.93	169.96
	A/RH2R10	2% WALL RH XMTR 0/10V	INFO	328.39	164.19
	A/RH2R2	2% WALL RH XMTR 4/20 MA		281.79	140.90
	A/RH2R210	2% WALL RH XMTR 0/10V	INFO	328.39	164.19
	A/RH2R25	2% WALL RH XMTR 0/5V	INFO	328.39	164.19
	A/RH2R5	2% WALL RH XMTR 0/5V	INFO	328.39	164.19
	A/RH2RP10	REMOTE RH 2% 10FT CABLE 4/20MA OUT	INFO	604.83	302.41
	A/RH2RP1010	REMOTE RH 2% 10FT CABLE 0/10V OUT	INFO	604.83	302.41
	A/RH2RP105	REMOTE RH 2% 10FT CABLE 0/5V OUT	INFO	604.83	302.41
	A/RH2RP20	REMOTE RH 2% 20FT CABLE 4/20MA OUT	INFO	739.78	369.89
	A/RH2RP2010	REMOTE RH 2% 20FT CABLE 0/10V OUT	INFO	739.78	369.89
	A/RH2RP205	REMOTE RH 2% 20FT CABLE 0/5V OUT	INFO	739.78	369.89
	A/RH2RP3	REMOTE RH 2% 3FT CABLE 4/20MA OUT	INFO	499.85	249.93
	A/RH2RP310	REMOTE RH 2% 3FT CABLE 0/10V OUT	INFO	499.85	249.93
	A/RH2RP35	REMOTE RH 2% 3FT CABLE 0/5V OUT	INFO	499.85	249.93
	A/RH2RP6	REMOTE RH 2% 6FT CABLE 4/20MA OUT	INFO	549.83	274.91
	A/RH2RP610	REMOTE RH 2% 6FT CABLE 0/10V OUT	INFO	549.83	274.91
	A/RH2RP65	REMOTE RH 2% 6FT CABLE 0/5V OUT	INFO	549.83	274.91
	A/RH2SP10	2% WALL PLT RH XMTR 0/10V	INFO	384.92	192.46
	A/RH2SP5	2% WALL PLT RH XMTR 0/5V	INFO	384.92	192.46
	A/RH2TT1000SUN	2% OUTSIDE AIR RH XMTR TEMP XMTR 100 RTD -40/160F	INFO	672.84	336.42
	A/RH2TT1K0SUN	2% OUTSIDE AIR RH XMTR TEMP XMTR 1K RTD -40/160F	INFO	672.84	336.42
	A/RH2-R-LCDR	2%SPACE DSPLY		443.68	221.84

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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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