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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		372.60	208.65
	A/RH2-100-O	2% OUTSIDE AIR RH XMTR W/TEMP SENSOR 100 OHM RTD	INFO	381.94	213.89
	A/RH2-100-R	2% WALL MOUNT RH XMTR W/TEMP SENSOR 100 OHM RTD	INFO	360.78	202.04
	A/RH2-100-RO	2% WALL MOUNT RH XMTR W/TEMP 100 OHM RTD OVR	INFO	371.88	208.25
	A/RH2-100KS-D	2% DUCT RH XMTR W/TEMP SENSOR 100K OHM THMS	INFO	357.00	199.92
	A/RH2-100KS-O	2% OUTSIDE AIR RH XMTR W/TEMP SENSOR 100K OHM THMS	INFO	368.22	206.20
	A/RH2-100KS-R	2% WALL RH XMTR W/TEMP SENSOR 100K OHM THMS	INFO	350.88	196.49
	A/RH2-100KS-RO	2% WALL RH XMTR W/TEMP 100K OHM THMS OVR	INFO	371.88	208.25
	A/RH2-1K-D	2% DUCT RH XMTR W/TEMP SENSOR 1K OHM RTD 383		357.00	199.92
	A/RH2-1K-O	2% OUTSIDE AIR RH XMTR W/TEMP SNSR 1K OHM RTD 383	INFO	327.42	183.36
	A/RH2-1K-R	2% WALL MOUNT RH XMTR W/TEMP SENSOR 1K OHM RTD 383		350.88	196.49
	A/RH2-1K-RO	2% WALL MOUNT RH XMTR W/TEMP 1K OHM RTD 383 OPVR	INFO	371.88	208.25
	A/RH2-20K-D	2% DUCT RH XMTR W/TEMP SENSOR 20K OHM THMS	INFO	357.00	199.92
	A/RH2-20K-O	2% OUTSIDE AIR RH XMTR W/TEMP SNSR 20K OHM THMS	INFO	327.42	183.36
	A/RH2-20K-R	2% WALL MOUNT RH XMTR W/TEMP SENSOR 20K OHM THMS	INFO	350.88	196.49
	A/RH2-20K-R2	2% WALL RH XMTR W/TMP SNSR 20K OHM THMS 0/10V	INFO	357.00	199.92
	A/RH2-20K-RO	2% WALL MOUNT RH XMTR W/TEMP 20K OHM THMS OVR	INFO	371.88	208.25
	A/RH2-20K-SP	2% WALL PLATE RH XMTR W/TEMP SENSOR 20K OHM THMS	INFO	452.88	253.61
	A/RH2-AN-D	2% DUCT RH XMTR W/TEMP SENSOR 10K OHM 3 THMS	INFO	357.00	199.92
	A/RH2-AN-O	2% OUTSIDE AIR RH XMTR W/TEMP SNSR 10K OHM 3 THMS	INFO	327.42	183.36
	A/RH2-AN-R	2% WALL MOUNT RH XMTR W/TEMP SENSOR 10K OHM 3 THMS		350.88	196.49
	A/RH2-AN-RO	2% WALL MOUNT RH XMTR W/TEMP 10K OHM 3 THMS OVR	INFO	363.12	203.35
	A/RH2-CP-D	2% DUCT RH XMTR W/TEMP SENSOR 10K OHM 2 THMS		357.00	199.92
	A/RH2-CP-O	2% OUTSIDE AIR RH XMTR W/TEMP SNSR 10K OHM 2 THMS	INFO	327.42	183.36
	A/RH2-CP-R	2% WALL MOUNT RH XMTR W/TEMP SENSOR 10K OHM 2 THMS		350.88	196.49
	A/RH2-CP-R2	2% WALL RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/10V	INFO	360.20	201.71
	A/RH2-CP-RO	2% WALL MOUNT RH XMTR W/TEMP 10K OHM 2 THMS OVR	INFO	363.12	203.35
	A/RH2-D	2% DUCT RH XMTR		345.78	193.64
	A/RH2-D-10	2% DUCT HUMIDITY SENSOR 0-10VDC OUTPUT	INFO	444.47	248.90
	A/RH2-D-3PTNIST	2% DUCT HUMIDITY SENSOR 3 POINT NIST	INFO	429.42	240.48
	A/RH2-D-5	2% DUCT HUMIDITY SENSOR 0-5VDC OUTPUT	INFO	367.20	205.63
	A/RH2-D-5PTNIST	2% DUCT HUMIDITY SENSOR 5 POINT NIST	INFO	486.54	272.46
	A/RH2-O	2% OUTSIDE AIR RH XMTR	INFO	314.16	175.93
	A/RH2-O-BB	2% OSA RH XMTR 0-5, 0-10VDC AND 4-20MA NEMA 3R ENCL		359.04	201.06
	A/RH2-R	2% WALL MOUNT RH XMTR	INFO	339.66	190.21
	A/RH20SUN	2% OUTSIDE AIR RH XMTR	INFO	646.51	362.04
	A/RH21000SUN	2% OUTSIDE AIR RH XMTR 100 RTD	INFO	656.45	367.61
	A/RH2100D1010	2% DUCT RH XMTR W/TMP SNSR 100 OHM RTD 0/10V	INFO	381.37	213.57
	A/RH2100D5	2% DUCT RH XMTR W/TMP SNSR 100 OHM RTD 0/5V	INFO	367.09	205.57
	A/RH2100KS0SUN	2% OUTSIDE AIR RH XMTR 100K THMS	INFO	656.45	367.61
	A/RH2100KSD1010	2% DUCT RH XMTR W/TMP SNSR 100K OHM THMS 0/10V	INFO	381.37	213.57
	A/RH2100KSD5	2% DUCT RH XMTR W/TMP SNSR 100K OHM THMS 0/5V	INFO	367.09	205.57
	A/RH2100KSO1010	2% OSA RH XMTR W/TMP SNSR 100K OHM THMS 0/10V	INFO	381.94	213.88
	A/RH2100KSO5	2% OSA RH XMTR W/TMP SNSR 100K OHM THMS 0/5V	INFO	381.94	213.88
	A/RH2100KSP1010	2% WALL PLT RH XMTR W/TMP SNSR 100K OHM THMS 0/10V	INFO	392.64	219.88
	A/RH2100KSR10	2% WALL RH XMTR W/TMP SNSR 100K OHM THMS 0/10V	INFO	368.10	206.14
	A/RH2100KSR210	2% WALL RH XMTR W/TMP SNSR 100K OHM THMS 0/10V	INFO	337.00	188.72
	A/RH2100KSR25	2% WALL RH XMTR W/TMP SNSR 100K OHM THMS 0/5V	INFO	368.10	206.14
	A/RH2100KSR5	2% WALL RH XMTR W/TMP SNSR 100K OHM THMS 0/5V	INFO	368.10	206.14
	A/RH2100KSSP5	2% WALL PLT RH XMTR W/TMP SNSR 100K OHM THMS 0/5V	INFO	392.64	219.88
	A/RH2100O1010	2% OSA RH XMTR W/TMP SNSR 100 OHM RTD 0/10V	INFO	381.94	213.88
	A/RH2100O55	2% OSA RH XMTR W/TMP SNSR 100 OHM RTD 0/5V	INFO	358.06	200.52
	A/RH2100R10	2% WALL RH XMTR W/TMP SNSR 100 OHM RTD 0/10V	INFO	368.10	206.14
	A/RH2100R210	2% WALL RH XMTR W/TMP SNSR 100 OHM RTD 0/10V	INFO	368.10	206.14
	A/RH2100R25	2% WALL RH XMTR W/TMP SNSR 100 OHM RTD 0/5V	INFO	368.10	206.14
	A/RH2100R5	2% WALL RH XMTR W/TMP SNSR 100 OHM RTD 0/5V	INFO	368.10	206.14
	A/RH2100SP1010	2% WALL PLT RH XMTR W/TMP SNSR 100 OHM RTD 0/10V	INFO	392.64	219.88
	A/RH2100SP5	2% WALL PLT RH XMTR W/TMP SNSR 100 OHM RTD 0/5V	INFO	392.64	219.88
	A/RH21K0SUN	2% OUTSIDE AIR RH XMTR 1K RTD	INFO	656.45	367.61
	A/RH21K2WRP10	REMOTE RH 2% 10FT CABLE 4/20MA OUT TEMP 1K RTD	INFO	626.10	350.61
	A/RH21K2WRP1010	REMOTE RH 2% 10FT CABLE 0/10V OUT TEMP 1K RTD	INFO	626.10	350.61
	A/RH21K2WRP105	REMOTE RH 2% 10FT CABLE 0/5V OUT TEMP 1K RTD	INFO	626.10	350.61
	A/RH21K2WRP20	REMOTE RH 2% 20FT CABLE 4/20MA OUT TEMP 1K RTD	INFO	762.73	427.13
	A/RH21K2WRP2010	REMOTE RH 2% 20FT CABLE 0/10V OUT TEMP 1K RTD	INFO	762.73	427.13
	A/RH21K2WRP205	REMOTE RH 2% 20FT CABLE 0/5V OUT TEMP 1K RTD	INFO	762.73	427.13
	A/RH21K2WRP3	REMOTE RH 2% 3FT CABLE 4/20MA OUT TEMP 1K RTD	INFO	518.00	290.08
	A/RH21K2WRP310	REMOTE RH 2% 3FT CABLE 0/10V OUT TEMP 1K RTD	INFO	518.00	290.08
	A/RH21K2WRP35	REMOTE RH 2% 3FT CABLE 0/5V OUT TEMP 1K RTD	INFO	518.00	290.08
	A/RH21K2WRP6	REMOTE RH 2% 6FT CABLE 4/20MA OUT TEMP 1K RTD	INFO	568.99	318.64
	A/RH21K2WRP610	REMOTE RH 2% 6FT CABLE 0/10V OUT TEMP 1K RTD	INFO	568.99	318.64
	A/RH21K2WRP65	REMOTE RH 2% 6FT CABLE 0/5V OUT TEMP 1K RTD	INFO	568.99	318.64
	A/RH21KD1010	2% DUCT RH XMTR W/TMP SNSR 1K OHM RTD 0/10V 385	INFO	381.37	213.57
	A/RH21KD5	2% DUCT RH XMTR 0/5V W/TMP SNSR 1K OHM RTD 385	INFO	381.37	213.57
	A/RH21KO1010	2% OSA RH XMTR W/TMP SNSR 1K OHM RTD 0/10V 385	INFO	381.94	213.88
	A/RH21KO5	2% OSA RH XMTR 0/5V W/TMP SNSR 1K OHM RTD 385	INFO	381.94	213.88
	A/RH21KR10	2% WALL RH XMTR W/TMP SNSR 1K OHM RTD 0/10V 385	INFO	368.10	206.14
	A/RH21KR210	2% WALL RH XMTR W/TMP SNSR 1K OHM RTD 0/10V 385	INFO	368.10	206.14
	A/RH21KR25	2% WALL RH XMTR 0/5V W/TMP SNSR 1K OHM RTD 385	INFO	368.10	206.14
	A/RH21KR5	2% WALL RH XMTR 0/5V W/TMP SNSR 1K OHM RTD 385	INFO	368.10	206.14
	A/RH21KSP1010	2% WALL PLT RH XMT W/TMP SNSR 1K OHM RTD 0/10V 385	INFO	392.64	219.88
	A/RH21KSP5	2% WALL PLT RH XMTR 0/5V W/TMP SNR 1K OHM RTD 385	INFO	392.64	219.88
	A/RH220K0SUN	2% OUTSIDE AIR RH XMTR 20K THMS	INFO	656.45	367.61
	A/RH220KD10	2% DUCT RH XMTR W/TMP SNSR 20K OHM THMS 0/10V	INFO	381.37	213.57
	A/RH220KD5	2% DUCT RH XMTR W/TMP SNSR 20K OHM THMS 0/5V	INFO	381.37	213.57
	A/RH220KO10	2% OSA RH XMTR W/TMP SNSR 20K OHM THMS 0/10V	INFO	344.00	192.64
	A/RH220KO5	2% OSA RH XMTR W/TMP SNSR 20K OHM THMS 0/5V	INFO	381.94	213.88
	A/RH220KR10	2% WALL RH XMTR W/TMP SNSR 20K OHM THMS 0/10V	INFO	368.10	206.14
	A/RH220KR25	2% WALL RH XMTR W/TMP SNSR 20K OHM THMS 0/5V	INFO	368.10	206.14
	A/RH220KR5	2% WALL RH XMTR W/TMP SNSR 20K OHM THMS 0/5V	INFO	368.10	206.14
	A/RH220KSP10	2% WALL PLT RH XMTR W/TMP SNSR 20K OHM THMS 0/10V	INFO	392.64	219.88
	A/RH220KSP5	2% WALL PLT RH XMTR W/TMP SNSR 20K OHM THMS 0/5V	INFO	392.64	219.88
	A/RH23K0SUN	2% OUTSIDE AIR RH XMTR 3K THMS	INFO	656.45	367.61
	A/RH23KD	2% DUCT RH XMTR W/TMP 3K THMS	INFO	372.60	208.65
	A/RH23KD10	2% DUCT RH XMTR W/TMP 3K THMS 0/10V	INFO	355.47	199.06
	A/RH23KD5	2% DUCT RH XMTR W/TMP 3K THMS 0/5V	INFO	381.37	213.57
	A/RH23KO	2% OSA RH XMTR W/TMP 3K THMS	INFO	327.42	183.36
	A/RH23KO10	2% OSA RH XMTR W/TMP 3K THMS 0/10V	INFO	346.73	194.17
	A/RH23KO5	2% OSA RH XMTR W/TMP 3K THMS 0/5V	INFO	381.94	213.88
	A/RH23KR	2% WALL RH XMTR W/TMP 3K THMS	INFO	350.88	196.49
	A/RH23KR10	2% WALL RH XMTR W/TMP 3K THMS 0/10V	INFO	334.95	187.57
	A/RH23KR2	2% WALL RH XMTR W/TMP 3K THMS	INFO	350.88	196.49
	A/RH23KR210	2% WALL RH XMTR W/TMP 3K THMS 0/10V	INFO	334.95	187.57
	A/RH23KR25	2% WALL RH XMTR W/TMP 3K THMS 0/5V	INFO	368.10	206.14
	A/RH23KR5	2% WALL RH XMTR W/TMP 3K THMS 0/5V	INFO	368.10	206.14
	A/RH23KSP	2% SS PLT RH XMTR W/TMP 3K THMS	INFO	407.97	228.46
	A/RH23KSP10	2% SS PLT RH XMTR W/TMP 3K THMS 0/10V	INFO	378.31	211.85
	A/RH23KSP5	2% SS PLT RH XMTR W/TMP 3K THMS 0/5V	INFO	392.64	219.88
	A/RH2AN0SUN	2% OUTSIDE AIR RH XMTR 10K 3 THMS	INFO	656.45	367.61
	A/RH2AND10	2% DUCT RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/10V	INFO	381.37	213.57
	A/RH2AND5	2% DUCT RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/5V	INFO	381.37	213.57
	A/RH2ANO5	2% OSA RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/5V	INFO	381.94	213.88
	A/RH2ANR10	2% WALL RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/10V	INFO	368.10	206.14
	A/RH2ANR25	2% WALL RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/5V	INFO	368.10	206.14
	A/RH2ANR5	2% WALL RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/5V	INFO	368.10	206.14
	A/RH2ANSP10	2% WALL PLT RH XMT W/TMP SNSR 10K OHM 3 THMS 0/10V	INFO	368.22	206.20
	A/RH2ANSP5	2% WALL PLT RH XMTR W/TMP SNSR 10K OHM 3 THMS 0/5V	INFO	392.64	219.88
	A/RH2CP0SUN	2% OUTSIDE AIR RH XMTR 10K 2 THMS	INFO	697.00	390.32
	A/RH2CPD10	2% DUCT RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/10V	INFO	381.37	213.57
	A/RH2CPD5	2% DUCT RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/5V	INFO	381.37	213.57
	A/RH2CPR10	2% WALL RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/10V	INFO	368.10	206.14
	A/RH2CPR5	2% WALL RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/5V	INFO	368.10	206.14
	A/RH2CPSP10	2% WALL PLT RH XMT W/TMP SNSR 10K OHM 2 THMS 0/10V	INFO	392.64	219.88
	A/RH2CPSP5	2% WALL PLT RH XMTR W/TMP SNSR 10K OHM 2 THMS 0/5V	INFO	392.64	219.88
	A/RH2D10	2% DUCT RH XMTR 0/10V	INFO	367.78	205.96
	A/RH2D5	2% DUCT RH XMTR 0/5V	INFO	355.47	199.06
	A/RH2O10	2% OSA RH XMTR 0/10V	INFO	346.73	194.17
	A/RH2O5	2% OSA RH XMTR 0/5V	INFO	346.73	194.17
	A/RH2R10	2% WALL RH XMTR 0/10V	INFO	334.95	187.57
	A/RH2R2	2% WALL RH XMTR 4/20 MA		304.98	170.79
	A/RH2R210	2% WALL RH XMTR 0/10V	INFO	334.95	187.57
	A/RH2R25	2% WALL RH XMTR 0/5V	INFO	334.95	187.57
	A/RH2R5	2% WALL RH XMTR 0/5V	INFO	334.95	187.57
	A/RH2RP10	REMOTE RH 2% 10FT CABLE 4/20MA OUT	INFO	616.92	345.48
	A/RH2RP1010	REMOTE RH 2% 10FT CABLE 0/10V OUT	INFO	616.92	345.48
	A/RH2RP105	REMOTE RH 2% 10FT CABLE 0/5V OUT	INFO	616.92	345.48
	A/RH2RP20	REMOTE RH 2% 20FT CABLE 4/20MA OUT	INFO	754.57	422.56
	A/RH2RP2010	REMOTE RH 2% 20FT CABLE 0/10V OUT	INFO	754.57	422.56
	A/RH2RP205	REMOTE RH 2% 20FT CABLE 0/5V OUT	INFO	754.57	422.56
	A/RH2RP3	REMOTE RH 2% 3FT CABLE 4/20MA OUT	INFO	509.85	285.52
	A/RH2RP310	REMOTE RH 2% 3FT CABLE 0/10V OUT	INFO	509.85	285.52
	A/RH2RP35	REMOTE RH 2% 3FT CABLE 0/5V OUT	INFO	509.85	285.52
	A/RH2RP6	REMOTE RH 2% 6FT CABLE 4/20MA OUT	INFO	560.83	314.06
	A/RH2RP610	REMOTE RH 2% 6FT CABLE 0/10V OUT	INFO	560.83	314.06
	A/RH2RP65	REMOTE RH 2% 6FT CABLE 0/5V OUT	INFO	560.83	314.06
	A/RH2SP10	2% WALL PLT RH XMTR 0/10V	INFO	392.62	219.87
	A/RH2SP5	2% WALL PLT RH XMTR 0/5V	INFO	392.62	219.87
	A/RH2TT1000SUN	2% OUTSIDE AIR RH XMTR TEMP XMTR 100 RTD -40/160F	INFO	686.29	384.32
	A/RH2TT1K0SUN	2% OUTSIDE AIR RH XMTR TEMP XMTR 1K RTD -40/160F	INFO	686.29	384.32
	A/RH2-R-LCDR	2%SPACE DSPLY		452.56	253.43

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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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